Amplifier

Details Amplifier Amplifier

2008-05-28

2009-06-23

Choe, Henry K (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

C330S279000

Reexamination Certificate

active

07551031

ABSTRACT:
The amplifier comprises an inverting negative feedback amplifier circuit using an operational amplifier, a comparator for comparing the potential of the negative phase input terminal of the operational amplifier with the reference potential Vref of the comparator, and a low-pass filter. The imaginary short state of the operational amplifier is lost when clipping occurs on the output signal. It is thus possible to detect clipping by monitoring the potential of the negative phase input terminal.

REFERENCES:
patent: 4166981 (1979-09-01), Marchasson et al.
patent: 5408197 (1995-04-01), Miyake
patent: 6909323 (2005-06-01), Ueno et al.

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