Automatic level control circuit with improved recovery action

Details Automatic level control circuit with improved recovery action Automatic level control circuit with improved recovery action

2007-11-20

2007-11-20

Nguyen, Khanh Van (Department: 2817)

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

C330S279000

Reexamination Certificate

active

11187185

ABSTRACT:
An automatic level control circuit comprises a level detection circuit which detects attack detection to sense a detection level greater than a predetermined level and recovery detection to sense a detection level smaller than the predetermined level, and a gain control circuit which outputs a gain adjustment control signal to regulate a gain of an variable gain amplifier such that an output signal from the variable gain amplifier is set to a predetermined signal level. The gain control circuit generates multiple candidate signals to change the gain at different response speeds, and selectively outputs, as a gain adjustment control signal, one of the candidate signals capable of providing the smallest value as the gain. Therefore, even when the gain is rapidly reduced by the attack action against a short-duration large signal, the gain can be returned to its original state at an appropriate speed.

REFERENCES:
patent: 5423081 (1995-06-01), Thiele et al.
patent: 6670849 (2003-12-01), Damgaard et al.
patent: 7164315 (2007-01-01), Camnitz et al.
patent: 11-328855 (1999-11-01), None
English Patent Abstract of JP11328855 from esp@cenet, published Nov. 30, 1999, 1 page.
U.S. Office Action issued in U.S. Appl. No. 11/187,281 mailed on Feb. 21, 2007, 7 pages.

Affiliated with

Also associated with

Rating

Automatic level control circuit with improved recovery action does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic level control circuit with improved recovery action, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic level control circuit with improved recovery action will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3816659