Multi-stage amplifier with switching circuitry

Details Multi-stage amplifier with switching circuitry Multi-stage amplifier with switching circuitry

2007-04-03

2007-04-03

Choe, Henry (Department: 2817)

Amplifiers

With periodic switching input-output

C330S051000

Reexamination Certificate

active

11155296

ABSTRACT:
Disclosed are a multi-stage amplifier circuit, a method of operating a multi-stage amplifier circuit, and a device with the multi-stage amplifier circuit. The amplifier circuit technology includes an operational amplifier shared among multiple stages and switching circuitry. The various switching circuitry switches among elements to provide different input signals and different feedback to the shared operational amplifier at the different stages of operation of the amplifier circuit. The various switching circuitry also stores and discharges charge at one or more operational amplifier inputs.

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Christine K. Eun, Jonathan R. Engbrecht and John W. Liu, “Multistage Op-Amp Design Method for High Bandwidth, Low Supply Voltage Applications”,University of Michigan Design 2003, pp. 1-6.
Fan You, Sherif H. K. Embabi and Edgar Sanchez-Sinencio, “Multistage Amplifier Topologies with Nested Gm-C Compensation”, IEEE Journal of Solid-State Circuits, vol. 32, No. 12, pp. 2000-2011, Dec. 1997.
Bharath Kumar Thandri and Jose Silva-Martinez, “A Robust Feedforward Compensation Scheme for Multistage Operational Transconductance Amplifiers With No Miller Capacitors”, IEEE Journal of Solid-State Circuits, vol. 38, No. 2, pp. 237-243, Feb. 2003.
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You et al. “Multistage Amplifier Topologies with Nested Gm-C Compensation” IEEE Journal of Solid-State Circuits, vol. 32, No. 12, Dec. 1997, pp. 2000-2011.

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