Aspen Scientific Design, Inc.
Consulting in Analog/Mixed-Signal ICs,
MEMS, and Related Disciplines

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Journal publications/ presentations:

C. A. Lish, "A Direct Energy Balance Method for Approximating Envelope Decay
of Oscillating MEMS Structures," IEEE Transactions on Ultrasonics, Ferroelectrics
and Frequency Control, June 2004. (pdf)

C. A. Lish, "A Class A/B Floating Buffer BiCMOS Power Op-Amp," IEEE Journal of
Solid-State Circuits, June 1995. (pdf)

C. A. Lish, "A Method of Tap Clustering in an Adaptive Filter for Video Ghost Cancellation,"
IEEE Intl. Symp. on Circuits and Systems Proceedings, May 1990. (pdf)

D. Giannopoulos, S. Wong and C. A. Lish, "Functional-Level Simulation of Switched
Capacitors with Non-ideal Switches and Operational Amplifiers," IEEE Custom Integrated
Circuits Conf. Proceedings, May 1989. (pdf)

C. A. Lish, "A z Plane Lerner Switched Capacitor Filter," IEEE J. of Solid State Circuits,
Dec. 1984. (pdf)

C. A. Lish, "A z Plane Lerner Switched Capacitor Filter," IEEE Custom Integrated Circuits
Conf. Proceedings, May 1984. (pdf)

White Paper:

C. A. Lish, "An Analog Technique for Optimizing EPROM Programming" (pdf)

Patents:

8,129,964 - 2012. Interleaved/All-Phase Mode Switched PWM System. A multi-phase
PWM architecture for transient power management. (C. A. Lish and D. Pham) [link]

5,361,041 - 1994. Improved Push-Pull Amplifier. Presents floating replica buffer
technique to control NMOS source follower. (C. A. Lish) [link]

5,050,119 - 1991. Optimized Sparse Transversal Filter. Methods where tap weight
position and value are both optimized. (C. A. Lish) [link]

5,043,814 - 1991. Adaptive Ghost Cancellation Circuit. Adaptive filter with variable
weight position and value that attenuates video echo. (C. A. Lish) [link]

5,045,945 - 1991. Method of Adaptive Ghost Cancellation. Uses a threshold
technique to establish tap position. (S. Herman and C. A. Lish) [link]

4,866,645 - 1989. Neural Network with Dynamic Refresh Capabilities. A hybrid
analog-digital architecture is used. (C. A. Lish) [link]

4,697,153 - 1987. Cascode Auto-Bias Circuit. Used to automatically tune amplifier
bias for maximum output swing over MOS process spread. (C. A. Lish) [link]

4,538,113 - 1985. Switched Capacitor Filter. Linear phase type; topology developed
to implement Lerner Function. (C. A. Lish) [link]

4,122,490 - 1978. Digital Chroma Key Generator. A special effects circuit that creates
traveling mattes with chroma phasor of NTSC video signal. (C. A. Lish) [link]


 

 
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