System and method to accelerate settling of an amplifier

Details System and method to accelerate settling of an amplifier System and method to accelerate settling of an amplifier

2005-11-08

2005-11-08

Choe, Henry (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S253000

Reexamination Certificate

active

06963245

ABSTRACT:
A system and method are used to accelerate settling or steady state of an amplifier in an amplifier system. This is used to ensure the amplifier reaches steady-state within a specified time period from stand-by or another state without using more current than is needed for steady-state. A comparator in a common-mode feedback system compares a desired amplifier output signal to one or more nodes of the amplifier. A result of the comparison is compared to a threshold value using a comparator in a settling acceleration system. If the result crosses the threshold, a controller turns on a driver in the settling acceleration system. The driver pulls on one or more nodes of the amplifier, which, along with a driver in the amplifier system pulling on the node, quickly brings the amplifier to settling or steady state.

REFERENCES:
patent: 5838199 (1998-11-01), Nakamura
patent: 5936466 (1999-08-01), Andoh et al.
patent: 6265941 (2001-07-01), Lopata

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