Optimum composite cascode amplifier

Details Optimum composite cascode amplifier Optimum composite cascode amplifier

2007-02-27

2007-02-27

Choe, Henry (Department: 2817)

Amplifiers

Signal feedback

In cascade amplifiers

C330S085000

Reexamination Certificate

active

11137102

ABSTRACT:
An improved amplifier circuit which effectively combines two amplifier stages by utilizing two nested feedback loops so that an inverting amplifier topology is used with a FET input device, operating as a common source/emitter configuration cascoded by the inverting input of an opamp. The circuit operates as a non-inverting amplifier and is connnected to the drain or collector with local nested feedback to (a) independently control the loop gain, (b) linearize its own operation, and (c) control the stability of the circuit. Additional inputs can be summed using a non-inverting summing circuit. One application reduces distortion derived from a high impedance, capacitive input source.

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patent: 6590452 (2003-07-01), van Rhijn
patent: 7078965 (2006-07-01), Laletin

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