Overload recovery circuit for folded cascode amplifiers

Details Overload recovery circuit for folded cascode amplifiers Overload recovery circuit for folded cascode amplifiers

2007-09-24

2009-08-04

Nguyen, Khanh V (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S255000

Reexamination Certificate

active

07570113

ABSTRACT:
In a method and apparatus for rapidly recovering an improved amplifier from an overload condition, a cascode amplifier (CASA) having a pair of inputs and an output is coupled to an overload recovery circuit (ORC). The pair of inputs is coupled to receive a differential input signal. A deviation in the differential input signal that is greater than a threshold causes a deviation in a current provided to at least one transistor included in the CASA. The deviation in the current causes the CASA to operate in an overload condition (OC). The ORC includes a makeup current circuit operable to generate an overload current in response to the OC and a controller operable to control a voltage at the output during the OC. The controller coupled to the makeup current circuit provides the overload current to the CASA to enable the rapid recovery from the OC.

REFERENCES:
patent: 6317000 (2001-11-01), Ivanov et al.
patent: 7342450 (2008-03-01), Jones

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