Self-biasing boot-strapped cascode amplifier

Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Nonlinear amplifying circuit

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Details

327561, 327545, 330288, 330310, H03F 368

Patent

active

054123364

ABSTRACT:
A cascode amplifier circuit including an input mirroring transistor (401) that generates a first output current (403) in response to the input signal. A diode connected transistor (404) generates a control bias proportional to the first output current. A cascode connected transistor output stage (405) includes a common source transistor (406) coupled to the input signal and the input mirroring transistor (401) for establishing an output current (407) in the cascode connected transistor output stage. A common gate transistor (408) is coupled to the diode connected transistor (404) and the common source transistor (406) for isolating the common source transistor (406) from any change in an output voltage present at an output terminal (409) of the common gate transistor (408) while operating to control the output currently(407) in response to the control bias.

REFERENCES:
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patent: 4568844 (1986-02-01), O'Connor
patent: 4714840 (1987-12-01), Proebsting
patent: 4825018 (1989-04-01), Okada et al.
patent: 5057722 (1991-10-01), Kobatake
patent: 5162680 (1992-11-01), Norman et al.
patent: 5177374 (1993-01-01), Carpenter et al.
patent: 5245222 (1993-09-01), Carobolante

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