Integrated circuit that provides access to an output node of...

Details Integrated circuit that provides access to an output node of... Integrated circuit that provides access to an output node of...

2005-04-12

2005-04-12

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including frequency-responsive means in the signal...

C330S307000, C330S308000, C330S075000

Reexamination Certificate

active

06879216

ABSTRACT:
An IC includes an externally accessible terminal, a filter, and an output stage. The filter has an adjustable bandwidth and has an output node coupled to the externally accessible terminal, and the output stage has an input node coupled to the output node of the filter. By providing access to a node that is between the filter and an amplitude-limiting output stage, the IC allows one to adjust the bandwidth of the filter—or the bandwidth of a circuit, such as an amplifier, that includes the filter—by measuring the amplitude of a signal that can have a relatively high S/N ratio without being clipped by the output stage. Consequently, such access can eliminate the need for a high-precision bandwidth-adjust setup and its long bandwidth-adjust times.

REFERENCES:
patent: 3691394 (1972-09-01), Davis
patent: 4339828 (1982-07-01), Chasek
patent: 5095534 (1992-03-01), Hiyama

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