Multistage differential amplifier

Details Multistage differential amplifier Multistage differential amplifier

2006-05-30

2006-05-30

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S257000, C330S258000

Reexamination Certificate

active

07053711

ABSTRACT:
The invention relates to a multistage differential amplifier circuit having a multistage differential amplifier which has an input stage and at least one output stage connected downstream of the input stage, having a CMFB circuit whose input side is connected to outputs on the output stage, having a first control loop, which can be used to set a load for the input stage using a first control signal from the CMFB circuit, having at least one second control loop, which is arranged between the outputs of the output stage and a control input on the CMFB circuit and which uses an output common-mode level which can be tapped off at the output stage to produce a continuous-time, second control signal for setting an operating point for the CMFB circuit.

REFERENCES:
patent: 5955922 (1999-09-01), Nicollini et al.
patent: 6317068 (2001-11-01), Gattani et al.
patent: 6335655 (2002-01-01), Yamamoto
patent: 6697001 (2004-02-01), Oliaei et al.
patent: 6812784 (2004-11-01), Michalski
patent: 2003/0048134 (2003-03-01), Ramazan et al.
patent: 101 42 707 (2003-04-01), None

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