Publications , White Papers , Talks and Patents


Publications:

[YWF87]
Yen, C., R. Walker and B. McFarland, Delay Calculation for Emitter-Coupled Logic Gates - How Fast is HP1X Process?, Proceedings of the Hewlett-Packard 1987 VLSI Design Technology Conference, May 18-20, 1987, S10.3.1-8.
[WSM87] [clean paper (no figures)] [scanned paper w/figures)]
Walker, R., W. McFarland, C. Stout, C. Yen, A 46 I/O Package for Prototyping Multi-GHz Circuits, 1987 HPL Internal Report.
[Wal87] [paper] [figs1] [figs2] [scanned paper w/figs]
Walker, R., A Monolithic High-Speed Voltage Controlled Ring Oscillator , Proceedings of the Hewlett-Packard 1987 VLSI Design Technology Conference, May 18-20, 1987, S10.6.1-5.
[CKM88] [paper]
Colinge, J. P., J. Kang, W. McFarland, C. Stout and R. Walker, Evaluation Results For Several High-Speed SOI CMOS Circuits, Proceedings of the Hewlett-Packard 1988 VLSI Design Technology Conference, May 23-25, 1988, 356-363.
[Wal88]
Walker, R., A Monolithic Clock Extraction and Retiming Circuit for Gigahertz Rate Data Links , Proceedings of the Hewlett-Packard 1988 VLSI Design Technology Conference, May 23-25, 1988, 279.
[WPS89] [paper]
Walker, R., K. Poulton, C. Stout, B. McFarland and J. Kang, Circuit Optimization Using the Simplex Algorithm, Proceedings of the Hewlett-Packard 1989 VLSI Design Technology Conference, May 22-24, 1989, 390-397.
[CKM88]
Colinge, J.P., J. Kang, W. McFarland, C. Stout, R. Walker, Gigahertz CMOS/SIMOX circuits, SOS/SOI Technology Workshop, 1988. Proceedings., 1988 IEEE.
[WHY89] [paper]
Walker, R. C., T. Hornak, C. Yen and K. Springer, A Chipset for Gigabit Rate Data Communication, Proceedings of the 1989 Bipolar Circuits and Technology Meeting, September 18-19, 1989, 288- 290.
[WHY90] [scanned paper]
Walker, R. C., T. Hornak, C. Yen, J. Doernberg and K. Springer, A 1.5 Gb/s Link Interface Chipset For Computer Data Transmission, HP Laboratories Technical Report HPL-90-105(July 1990).
[LaW90]
Lai, B. and R. Walker, A Monolithic 622 MBit/s Clock Extraction Data Retiming Circuit, Proceedings of the Hewlett-Packard 1990 VLSI Design Technology Conference, May 22-25, 1990, 237-244.
[DMW91]
Doernberg, J., W. McFarland, R. C. Walker and T. A. Knotts, Rapid Techniques to Beat the Competition, An 8-week, 1.5 Gwords/s, PRWS IC Design, Proceedings of the Hewlett-Packard 1991 VLSI Design Technology Conference, May 21-24, 1991 , 249-256.
[LaW91] [paper]
Lai, B. and R. Walker, A Monolithic 622 MBit/s Clock-Extraction Data Retiming Circuit, ISSCC Digest of Technical Papers 34 (February 13-15, 1991), 144-145.
[WHY91] [paper]
Walker, R. C., T. Hornak, C. Yen, J. Doernberg and K. H. Springer, A 1.5 Gb/s Link Interface Chipset For Computer Data Transmission, IEEE Journal on Selected Areas in Communications 9, 5 (June 1991).
[Wal92a] [thesis]
Walker, R. C., The Design and Implementation of a Chipset for Gigabit/Second Computer Networks, Graduate Thesis for Master of Science in Computer Science, California State University, Chico CA. Summer 1992, 1-51.
[Wal92b] [scanned paper]
Walker, R. C., Bang-Bang Loop Analysis, Hewlett- Packard Journal, October 1992, 110.
[WWS92] [paper]
Walker, R., J. Wu, C. Stout, B. Lai, C. Yen, T. Hornak and P. Petruno, A 2-Chip 1.5Gb/s Bus- Oriented Serial Link Interface, ISSCC Digest of Technical Papers 35(February 19-21, 1992).
[WSL92]
Walker, R., C. Stout, B. Lai, C. Yen, T. Hornak and P. Petruno, A 2-Chip 1.5Gb/s Bus-Oriented Serial Link Interface , Proceedings of the Hewlett-Packard 1992 VLSI Design Technology Conference, May 19-22, 1992, 85-91.
[WSW92] [paper]
Walker, R. C., C. L. Stout, J. Wu, B. Lai, C. Yen, T. Hornak and P. T. Petruno, A 2-Chip 1.5 Gigabaud Serial Link Interface, IEEE Journal of Solid State Circuits 27, 12 (December 1992), 1805-1.
[LaW92]
Lai, B. and R. C. Walker, Monolithic Chip Retimes Data at 622 Mb/s, Microwaves & RF, March 1992, 202-205.
[MWS92] [paper]
McFarland, W., R. Walker, C. Stout, J. Wu, B. Lai, G. Kwan and C. Yen, HP's Link Interface Chipset for Serial-HIPPI, Compcon Proceedings, February 24-28, 1992.
[YWP92] [scanned paper]
Yen, C., R. C. Walker, P. T. Petruno, C. Stout, B. W. H. Lai and W. J. McFarland, G-Link: A Chipset for Gigabit-Rate Data Communication, Hewlett- Packard Journal, October 1992, 103-109, 111-116.
[LWS92]
Lai, B., R. Walker, C. Stout, J.T. Wu, A 1.5 GBaud/sec Serial Link Monolithic Chip Set, Microwave Conference, 1992. 22nd European, Volume: 1.
[YWM92] [paper]
Yen, C., R. Walker, W. McFarland, D. Cunningham, G. Kwan, T. Hornak, Serial Extension for 800/1600 Mb/s Computer Interconnect , Supercomm ICC 14-18 June, 1992, 981-4 vol.2.
[YWS92] [paper]
Yen, C., R. Walker, C. Stout, B. Lai, J. Wu, A General Purpose Link Interface Chipset for Gigabit Rate Data Communication, IEEE Conference 6-9 Dec. 1992, 197-200 vol.1
[TeW92] [paper]
Teetzel, A. and R. Walker, A GaAs IC Broadband Variable Ring Oscillator and Arbitrary Integer Divider , Trans. MTT Symposium, December 1992.
[WuW92] [paper]
Wu, J. and R. C. Walker, A Bipolar 1.5 Gb/s Monolithic Phase-Locked Loop for Clock and Data Extraction, Symposium on VLSI Circuits Digest of Technical Papers, June 1992, pp. 70-71.
[HGM93]
Hornak, T., A. Grzegorek, B. McFarland, R. Walker, S. Willingham Image Rejection Improvements in Superheterodyne Radio Receivers by Time Sharing, HP Laboratories Technical Report, HPL-93-53, June, 1993, pp 1-56.
[WFW93] [paper]
Wuppermann, B., B. Fox, R. Walker, S. Atkinson, D. Budin, C. Lanzl and S. Bleiweiss, A 16-PSK Modulator with Phase Error Correction , ISSCC Digest of Technical Papers 36, 27 (February 24-25 1993), 138-139.
[HMW94]
Hornak, T., B. McFarland, R. Walker Quadrature Mixers with Improved Gain Matching and Single Phase Local Oscillator Signal, HP Laboratories Technical Report, HPL-94-80, August, 1994, pp 1-56.
[YTW94]
Young, I.A., S.S. Taylor, R.C. Walker INTRODUCTION TO THE SPECIAL ISSUE, IEEE Journal of Solid-State Circuits 29(12):1412-1414, November 1994.
[WSY97] [paper]
Walker, R. C., C. Stout, C. Yen and L. R. Dove, A 2.488-Gbit/s Silicon Bipolar Clock and Data Recovery Circuit for SONET Fiber-Optic Communications Networks , Hewlett-Packard Journal, December 1997, 111-119.
[WSY97a] [paper] [pdf slides]
Walker, R.C., C. Stout, C. Yen, 2.488 Gb/s Si-Bipolar Clock and Data Recovery IC with Robust Loss of Signal Detection, ISSCC Digest of Technical Papers 40 (February 1997), 246,247,466.
[WSY97b] [paper]
Yen, R. W. C. S. C., A 2.488 Gb/s Si-Bipolar Clock and Data Recovery IC with Robust Loss of Signal Detection, HP Design Conference Digest of Technical Papers 40(May 23, 1997).
[WHK98] [paper] [pdf slides]
Walker, R. C., K. Hsieh, T. A. Knotts and C. Yen, A 10Gb/s Si-Bipolar TX/RX Chipset for Computer Data Transmission , ISSCC Digest of Technical Papers 41(February 1998), 302,303,450.
[Wal03] [preprint]
Walker, R.C., Designing Bang-bang PLLs for Clock and Data Recovery in Serial Data Transmission Systems, pp. 34-45, a chapter appearing in "Phase-Locking in High-Performance Sytems - From Devices to Architectures", edited by Behzad Razavi, IEEE Press, 2003, ISBN 0-471-44727-7.

White Papers:

[Wal00]
Walker, R., "A monolithic calibration technique for precise multi-phase clock generation", Agilent Labs Patent Disclosure, February 25, 2000. (See patent application [Wal03c], below)
[Wal01a]
Walker, R., "A tuneable 40Gb/s CDR with jitter stimulus/response designed for fast-track implementation in Agilent test equipment (draft)", Agilent Labs Internal Memo, May 23, 2001.
[Wal09a]
Walker, R., "PBUS+, A flexible network for factory control", Project Report, February 2, 2009. "A simple RS485 network is implemented for factory control using Microchip PIC processors for $5/node".
[Wal09b]
Walker, R., "Watchdog", Project Report, February 23, 2009. A Hardware device for alerting operators to a firmware-lockup condition in a Czochralski crystal growth furnace.
[Wal09c]
Walker, R., "Czochralski Process Development and Control with Dsim", Project Report, March 23, 2009. "A simple timestep-based simulation of a Czochralski Crystal Growth Control Algorithm is presented".
[Wal09d]
Walker, R., "A High-Efficiency Control Algorithm for Electric Vehicles", Project Report, June 15, 2009. "It is shown that a substantial efficiency gain can be achieved by dynamically limiting the duty cycle of the motor controller based on RPM to force the system to avoid the low efficiency regime".
[Wal11a]
Walker, R., "Baseline tracking and touch detection", Project Report, May 20, 2011. Outlines an algorithm for Baseline tracking and touch detection for a prototype optical touch screen.
[Wal11b]
Walker, R., "Photocurrent signal to noise ratio", Project Report, May 23, 2011. Analyzes the noise of a photdiode signal using both transimpedance and switched integrator amplifier circuits.
[Wal11c]
Walker, R., "A single-inductor multiple-output buck-boost converter", Project Report, July 20, 2011. Presents a novel multi-voltage converter that requires a single inductor to generatre an arbitrary number of regulated output voltages.
[Wal12]
Walker, R., "Encrypted Product Sequence Numbers", Project Report, October 15, 2012. Putting a sequential number in a product can leak build volumes to competitors. This report presents a scheme using the skipjack32 encryption system to create a random permutation of sequence numbers based on a secret 80 bit key. The code allows a sequential factory build number to be converted into a random product ID for public perusal, and then later converted back to the original sequence number by product support.
[Wal13b]
Walker, R., "Reflection and Transmission Coefficient", Project Report, April 22, 2016, Searching for "reflection coefficient" yields immediate results. However, the transmission coefficient is rarely mentioned. In any practical problem involving scattering of waves in non-uniform structures, it is important to be able to calculate both the forward and reverse waves at each scattering site. Although many engineers take the reflection coefficient as a given, it is instructive to note that the expression is uniquely determined by just two principles. These are 1) voltage continuity at the scattering boundary, and 2) conservation of power between the incident wave and the two scattered waves.
[Wal16]
Walker, R., "Mutual Inductance of Collinear Solenoids", Project Report, July 29, 2016, "Efficient and accurate approximations to solenoidal inductance exist. By breaking a given solenoid into two pieces, it is possible to compute the mutual coupling between two adjacent solenoids. Breaking a solenoid into three segments, it is possible to bootstrap the process to calculate the coupling between all three segments. From this it possible to create an accurate model for either an arbitrarily tapped inductor, or two collinear solenoids separated by an arbitrary gap."

Talks:

Tutorials and Short Courses

[Wal97]
Walker, R., Clock and Data Recovery for Serial Data Communications, ISSCC Tutorial, February 1997. (Wal98, Wal02a are successively updated versions).
[Wal98] [cdr checklist and references]
Walker, R., Clock and Data Recovery for Serial Data Communications (with a tutorial on Bang-Bang Loop design), BCTM Tutorial, September 27 1998. (Wal02a is an updated version).
[Wal02a] [mp3 audio file (40Meg)]
Walker, R. C. Clock and Data Recovery for Serial Data Communications, focussing on bang-bang CDR design methodology, ISSCC Short Course, February 2002.

IEEE802.3 10 Gigabit Ethernet Presentations

[Wal99b]
R. C. Walker, 10GbE over coaxial cable, prepared for IEEE 802.3 High Speed Study Group, July 6-7, 1999, Montreal, PQ.
[WaD99]
R. C. Walker, R. Dugan Low overhead coding proposal for 10Gb/s serial links, IEEE 802.3 High Speed Study Group, November 9-10, 1999, Kauai, HI. http://grouper.ieee.org/groups/802/3/ 10G_study/public/nov99/walker_1_1199.pdf
[WaD00]
R. C. Walker, R. Dugan 64b/66b low-overhead coding proposal for serial links, IEEE 802.3 High Speed Study Group, January 18-20, 2000 Dallas, TX. http://grouper.ieee.org/groups/802/3/10G_study/public/jan00/walker_1_0100.pdf
[WAK00]
Rick Walker, Birdy Amrutur, Tom Knotts, Richard Dugan, 64b/66b coding update, IEEE 802.3 High Speed Study Group, March 7-8, 2000, Albuquerque, NM. http://grouper.ieee.org/groups/802/3/ae/public/mar00/walker_1_0300.pdf
[WDA00]
Rick Walker, Richard Dugan, Birdy Amrutur, John Ewen, Rich Taborek, Don Alderrou, Howard Frazier, Paul Bottorff, Brad Booth, Kevin Daines, Osamu Ishida, 64b/66b PCS, 802.3 High Speed Study Group, May 23-25, 2000, Ottowa, Ontario, Canada. (Final presentation to IEEE as accepted for the "blue book" draft standard). http://grouper.ieee.org/groups/802/3/ae/public/may00/walker_1_0500.pdf
[ThW01]
Pat Thaler, Rick Walker An optimized self-test function for 64b/66b 802.3 High Speed Study Group, March 12, 2001, Hilton Head, South Carolina. http://grouper.ieee.org/groups/802/3/ae/public/mar01/thaler_1_0301.pdf

Optical Internetworking Forum Presentations

[WaD01]
R. C. Walker, R. Dugan, SFI-4 Phase 2 Interface using the 64b/66b Line Code Optical Internetworking Forum, Contribution OIF2001.586, November 6-8, 2001, Frisco, Texas.
[WDL02]
R. C. Walker, R. Dugan, Allan Lui SFI-4 Phase 2: 64b/66b Line Code Update Optical Internetworking Forum, Contribution OIF2002.018.00, January 28-30, 2002, San Diego, CA.

Industry trends

[Wal99]
R. C. Walker, Tb/s Chip I/O - how close are we to practical reality?, 10th Annual Workshop on Interconnections within High Speed Digital Systems, May 9-12, 1999, Santa Fe, New Mexico.

Philosophy

[Wal01 (pdf slides)] [mp3 audio file 14Meg]
Rick Walker, Conciousness, Communication and Cooperation - in brains, bodies, businesses and biospheres, A chalk talk presented at Agilent Labs, Palo Alto, CA, June 29, 2001. Present the philosophical underpinnings of, and a model of human conciousness based on quantum computation and eastern thought.

Patents:

[McW88]
McFarland, W. and R. C. Walker, Pseudo-Random Word Sequence Generator and Synchronizer, U.S. Patent (1) #4791653, December 13, 1988.
[Wal89]
Walker, R. C., A Fully Integrated High-Speed Voltage Controlled Ring Oscillator, U.S. Patent (2) #4884041, Nov. 28, 1989.
[CHN90]
Corsetto, C., T. Hornak, R. Nordby, R. C. Walker and C. Yen, Phase Locked Loop for Clock Extraction in Gigabit Rate Data Communication Links, U.S. Patent (3) #4926447, May 15, 1990.
[LaW91]
Lai, B. and R. C. Walker, Method and Apparatus for Clock Recovery and Data Retiming for Random NRZ data, United States Patent (4) #5012494, April 30, 1991.
[WaB91]
Walker, R. C. and H. Braun, Device to block unauthorized modem access over a PBX line, United States Patent (5) #5018190, May 21, 1991.
[CHH91]
Crandall, D., S. R. Hessel, T. Hornak, R. Nordby, K. H. Springer, C. Corsetto and R. C. Walker, DC- Free Line Code for Arbitrary Data Transmission, United States Patent (6) #5022051, June 4, 1991.
[DWM92]
Domokos, J., R. C. Walker and W. J. McFarland, High Frequency Common Mode Choke, United States Patent (7) #5138287, August 11, 1992.
[CHH95]
Crandall, D., S. R. Hessel, T. Hornak, R. Nordby, K. H. Springer, C. Corsetto and R. C. Walker, DC- Free Line Code for Arbitrary Data Transmission, United States Patent (8) #5438621, August 1, 1995.
[LaW96]
Lai, B. and R. C. Walker, Unity Gain Positive Feedback Integrator with Programmable Charging Currents, U.S. Patent (9) #5498992, March 12, 1996.
[HGM97]
Hornak, T., A. Z. Grzegorek, W. J. McFarland, R. C. Walker and S. D. Willingham, Modulation and Frequency Conversion by Time Sharing, United States Patent (10) #5678222, October 14, 1997.
[KSW98]
Knotts, T., Stout, C., Walker, R. C., Fully Integrated High-Speed Interleaved Voltage-Controlled Ring Oscillator, United States Patent (11) #5841325, November 24, 1998.
[WuW00]
Wu, Bin, R. C. Walker, Oversampling Rotational Frequency Detector, United States Patent (12) #6055286, April 25, 2000.
[BGW01]
Blalock, Travis, N. Gaddis, R. Walker, Analog pixel drive circuit for an electro-optical material-based display device, United States Patent (13) #6249269, June 19, 2001.
[WBG01]
Walker, Richard C., Travis N. Blalock, Neela B. Gaddis, Electro-optic material based display device having analog pixel drivers, United States Patent (14) #6329974, December 11, 2001.
[WAD01a]
Walker, Richard C., B. Amrutur, R. Dugan, Coding for packetized serial data, European Patent Application EP1133124A2, Sept. 12, 2001.
[WAD01b]
Walker, Richard C., B. Amrutur, R. Dugan, 64b/66b decoding for packetized serial data, European Patent Application EP1133123A2, Sept. 12, 2001.
[WMB01]
Walker, Richard C., P. Mertz, B. Bronson, K. Nishimura, Personal viewing device with system for providing information to a connected system, European Patent Application EP1132870A2, Sept. 12, 2001.
[Wal02b]
Walker, Richard C., Method and system for compensating for defects in a multi-light valve display system, United States Patent (15) #6359662. March 19, 2002.
[WAM01]
Walker, Richard C., Bharadwaj Amrutur, Peter Mottishaw, Steven C. Joiner, Larry A. Chesler, Ian Hardcastle, Network monitoring system with built-in monitoring data gathering, European Patent Application EP1152570A2, November 7, 2001.
[WaT01]
Walker, Richard C., Patricia A. Thaler, Data Communication System with Self-Test Function, European Patent Application EP1241823A1, March 6, 2002.
[WMT01]
Walker, Richard C., Pierre Mertz, Barclay J. Tullis, Immersive Display System, European Patent Application EP1152279A2, Sept. 12, 2001.
[HFW02]
Ho, Peter, Graham M. Flower, Richard C. Walker, Multiplexer with channel sectioning, selectively actuated current sources, and common-base amplifiers European Patent Application EPEP1187382a2, March 13, 2002.
[Wal02c]
Walker, Richard C., System and method for encoding an input data stream by utilizing a predictive, look-ahead feature, United States Patent (16) #6501404. December 31, 2002.
[Wal03b]
Walker, Richard C., Immersive Display System, United States Patent (17) #6552698. April 22, 2003.
[AmW03]
Amrutur, Bharadwaj S., Richard C. Walker, Serial communications system and method, European Patent Application EP1320208A2, September 30, 2002.
[Wal03c]
Walker, Richard C., Multi-phase sampling United States Patent Application #20030123591. July 3, 2003.
[WAD03d]
Walker, Richard C., B. Amrutur, R. Dugan, Decoding method and decoder for 64b/66b coded packetized serial data, United States Patent (18) #6650638. November 18, 2003.
[WAD04a]
Walker, Richard C., B. Amrutur, R. Dugan, Coding method and coder for packetized serial data with low overhead, United States Patent (19) #6718491. April 6, 2004.
[HWM04]
Helbing, Rene P., Walker, Richard C., Mertz, Pierre, Bronson, Barry, Nishimura, Ken A., Personal viewing device with system for providing identification information to a connected system, United States Patent (20) #6735328. May 11, 2004.
[HFW04]
Ho, Peter, Graham M. Flower, Richard C. Walker, Multiplexer with channel sectioning, selectively actuated current sources, and common-base amplifiers, United States Patent (21) #6760349, July 6, 2004.
[SNW04]
Seet, Adrian Wan-Chew, Ken Nishimura, Richard C. Walker, Adaptive decoder for skin effect limited signals, United States Patent (22) #6760551, July 6, 2004.
[WBN04]
Walker, Richard C., Travis N. Blalock, Neela B. Gaddis, Electro-optical material-based grey scale generating method , United States Patent (23) #6795064, September 21, 2004.
[WaT05]
Walker, Richard C., Patricia A. Thaler, Data communication system with self-test facility, United States Patent (24) #6862701, March 1, 2005.
[WMT05]
Walker, Richard C., Pierre H. Mertz, Barclay J. Tullis, Immersive Display System, United States Patent (25) #6870520, March 22, 2005.
[WAM05]
Walker, Richard C., Bharadwaj Amrutur, Peter Mottishaw, Steven C. Joiner, Larry A. Chesler, Ian Hardcastle, Network monitoring system with built-in monitoring data gathering, United States Patent (26) #6975617, December 13, 2005.
[Wal06]
Walker, Richard C., B. Amrutur, R. Dugan, Coding method for coding packetized serial data with low overhead, United States Patent (27) #7055073 May 30, 2006.
[AmW07]
Amrutur, Bharadwaj S.,Walker, Richard C., Serial communications system and method, United States Patent Application () #20070168835 July 19, 2007.
[Wal07]
Walker, Richard C., Multi-phase sampling United States Patent (28) #7221723. May 22, 2007.
[Wal12a]
Walker, Richard C., Apparatuses, systems, and methods for facilitating optical communication between electronic devices, United States Patent Application () #20120141132, June 7, 2012
[Wal13]
Walker, Richard C., Apparatuses, systems, and methods for facilitating optical communication between electronic devices, United States Patent (29) #8403571, March 26, 2013.
[KOT13]
Jeffrey King, Tim Orsley, Rick Trutna, Richard Walker, Optical Touch-Screen Systems And Methods Using A Planar Transparent Sheet, United States Patent Application () #20130135258 , May 30, 2013.
[GMW13]
Brian Jeffrey Galloway, Joseph Peter Manca, Richard Clayton Walker, Receiver optical assemblies (ROAS) having photo-detector remotely located from transimpedance amplifier, and related components, circuits, and methods, European Patent Application EP13783457.8, October 16, 2013.
[Wal14]
Walker, Richard C., Integrated circuit for facilitating optical communication between electronic devices, United States Patent (30) #8824838, September 2, 2014.
[KPW15]
Jeffrey King, Dragan Pikula, Richard Walker, Robust Optical Touch - Screen Systems And Methods Using A Planar Transparent Sheet, United States Patent (31) #9046961, June 2, 2015.
[KOT15]
Jeffrey Stapleton King, Timothy James Orsley, William Richard Trutna, Richard Clayton Walker, Optical Touch - Screen Systems And Methods Using A Planar Transparent Sheet, United States Patent (32) #9213445, December 15, 2015.
[CTW15]
Mathieu Charbonneau-Lefort, Willam Richard Trutna, Richard Clayton Walker, Michael John Yadlowski, Optical Engines and Optical-Cable Assemblies Capable of Low-Speed And High-Speed Optical Communication, United States Patent (33) #9225423, December 29, 2015.
[CTY16]
Mathieu Charbonneau-Lefort, Richard Clayton Walker, Michael John Yadlowski, Optical Engines and Optical-Cable Assemblies having Electrical Signal Conditioning, United States Patent (34) #9497525, November 15, 2016.
Rick Walker
rick_walker "AT" omnisterra.com