Company Filing History:
Years Active: 2004-2010
Title: The Innovative Contributions of Robert Bell
Introduction
Robert Bell is a notable inventor based in Chandler, AZ, who has made significant contributions to the field of power conversion technology. With a total of 4 patents to his name, Bell's work focuses on enhancing the efficiency and functionality of power converters and opto-coupler interfaces.
Latest Patents
One of Bell's latest inventions is the "Current Mode Half-Bridge Power Converter." This invention relates to a half-bridge power converter controller that employs current mode control. The power converter controller includes pulse modulation circuitry, error circuitry, and stabilization circuitry. The stabilization circuitry stabilizes the voltage at the mid-point of a half-bridge power converter input capacitor circuit. The input capacitor circuit mid-point voltage is stabilized by selectively adjusting the on-times of the high-side switch and low-side switch of a half-bridge power converter. This adjustment tailors the current that is provided to the input capacitor circuit and thus maintains the mid-point voltage near a desired value.
Another significant patent is the "Apparatus and Method for High-Bandwidth Opto-Coupler Interface." This opto-coupler interface includes a current mirror and a resistor. The opto-coupler interface is arranged such that a relatively fixed voltage is provided across the photodetector. At one end of the photodetector, the voltage is relatively fixed because the photodetector is coupled to the input of a current mirror. Because the voltage across the opto-coupler is relatively fixed, the opto-coupler interface is a current interface rather than a voltage interface. Current from the photodetector is mirrored by the current mirror to provide an output mirror current. The output mirror current is provided to a resistor such that the resistor provides a voltage that is based on the output mirror current.
Career Highlights
Robert Bell is currently employed at National Semiconductor Corporation, where he continues to innovate and develop new technologies. His work has been instrumental in advancing the capabilities of power electronics.
Collaborations
Some of his notable coworkers include Steven Michael Barrow and Robert Oppen, who have collaborated with Bell on various projects within the company.
Conclusion
Robert Bell's contributions to the field of power conversion and opto-coupler technology highlight his innovative spirit and dedication to advancing electrical engineering. His patents reflect