Microchip Technology Inc.

Mudit Gupta

Huamin Zhou

Peter K Nagey

Keith Edwin Curtis

Ward Brown

John Charais

Clark Rogers

Dave Suda

Steve Kennelly

An operational amplifier with totem pole connected output transistors having inputs coupled to multiplexers for selectable coupling of signals and voltage levels thereto. The high and low output transistors may be forced hard on or hard off in addition to normal coupling of signals thereto. The operation of the output transistors may be dynamically changed to pass only positive going signals, negative going signals, placed in a tristate high impedance state, hard connected to a supply voltage and/or hard connected to supply common return. A core independent peripheral (CIP) may also be coupled to the operational amplifier for dynamically changing the multiplexer inputs in real time, as can external control signals to a control circuit coupled to the multiplexers.

Operational amplifier with controllable output modes

A bias voltage generator circuit may include a mode control circuit, a clock generator circuit coupled with the mode control unit and configured to generate a plurality of clock signals, and a charge pump circuit configured to receive the clock signals. The charge pump circuit may be coupled with the mode control circuit and operable to output selectable output voltages according to input from the mode control circuit. The output selectable voltages may depend upon the clock signals.

Multi-mode low current dual voltage self-regulated LCD pump system

Growing community of inventors

Tempe, AZ, United States of America

Mudit Gupta