Company Filing History:
Years Active: 1992-1993
Title: Craig Robertson: Innovator in CMOS Technology
Introduction
Craig Robertson is a notable inventor based in Mountain View, California. He has made significant contributions to the field of voltage-controlled oscillators, holding two patents that showcase his innovative approach to technology.
Latest Patents
One of Craig's latest patents is the "Linearized and Delay Compensated All CMOS VCO." This invention provides a linearized and delay compensated all CMOS voltage-controlled oscillator. A transconductance converter receives a control voltage input and provides a control current to a current-controlled ramping circuit responsible for generating two ramping voltage outputs. These outputs are compared to a threshold voltage by two comparators, which send pulses to a latch when the ramping voltages cross the threshold. The latch then provides the oscillating output of the circuit, which is fed back to the current-controlled ramping circuit for switching purposes. A compensation loop receives both the oscillating output and the control current, providing the threshold voltage to the comparators. This loop contains a similar current-controlled ramping circuit that produces ramping outputs identical to the first. Track-and-hold circuits triggered by the oscillating outputs provide peak voltages through a low-pass filter to a difference amplifier. An external reference voltage is supplied to the positive input of the difference amplifier, and its output serves as the threshold voltage to the comparators. The compensation loop effectively cancels out the delays from the comparator and latch.
Career Highlights
Craig Robertson is currently employed at Siliconsystems, Inc., where he continues to innovate in the field of electronics. His work has significantly impacted the development of CMOS technology, particularly in voltage-controlled oscillators.
Collaborations
Craig has collaborated with notable colleagues such as Shunsaku Ueda and Kwai-Kwong Lam, contributing to advancements in their shared field of expertise.
Conclusion
Craig Robertson is a distinguished inventor whose work in CMOS technology has led to significant advancements in voltage-controlled oscillators. His innovative patents and collaborations highlight his commitment to pushing the boundaries of technology.