Joe Martin Smith

Title: Joe Martin Smith: Inventor in Integrated Circuits and Signal Amplification

Introduction

Joe Martin Smith is an inventor associated with Scottsdale, Arizona, and Motorola Corporation. His patent work includes circuit designs for capacitance multiplication and efficient signal amplification. The supplied information lists 3 patents.

Latest Patents

Smith’s listed patents address ways to improve circuit performance and manage noise and power use.

“Capacitance multiplier circuit” describes an integrated circuit that varies a reference capacitor’s effective capacitance using a current-mirror arrangement. The design uses an operational amplifier and two mirror transistors to reduce series resistance. It can also use resistors to reduce noise, making the circuit suitable for applications that require relatively low noise.

“Method and apparatus for efficient signal amplification” describes an amplifier circuit with a power amplifier supplied by a modulated power source. The modulation relates to the amplitude of the signal being amplified, while the power amplifier is maintained at a substantially constant operating point. A feedback path compares the input and output signal envelopes, integrates the resulting error, and uses it to control a variable-gain element earlier in the amplifier chain.

Career Highlights

Smith’s listed inventions focus on analog and signal-processing circuit techniques. The capacitance multiplier patent addresses effective capacitance, parasitic effects, and noise, while the signal-amplification patent describes feedback-based gain control and power-supply modulation. The supplied information identifies Motorola Corporation as his company.

Collaborations

The supplied information names Gary Parker English and Christopher N. Kurby as Smith’s coworkers. It does not specify their roles in the listed inventions or patents.

Conclusion

Joe Martin Smith’s listed patent work reflects an emphasis on practical circuit design, including low-noise capacitance multiplication and efficient signal amplification.