Robert W Rodgers

Address:

2600 Ash Crk, Mesquite, TX 75181

VIN:

1HFTE270774606260

Make:

Cadillac

Model:

Escalade ESV AWD 4dr

Year:

2007

US Patent:

46098780, Sep 2, 1986

Filed:

Jul 31, 1985

Appl. No.:

6/761656

Inventors:

Robert L. Rodgers - Dallas TX

Assignee:

Circuit Research Labs, Inc. - Tempe AZ

International Classification:

H03G 902

US Classification:

330136

Abstract:

A noise reduction system including a signal path (34) between an input terminal (12) and an output terminal (36), a voltage control amplifier (38) and a control path (40) between the input terminal and the voltage control amplifier is disclosed. A nonlinear element such as a voltage squarer (32) is in the controlled path. In one arrangement, the control path also includes a signal level detector (22), a one-pole high pass filter (16) and a direct current level shifter (26). A precision diode (30) is interposed in the control path between the direct current level shifter and the signal squarer. One form of the noise reduction system includes a voltage-controlled low pass filter (20) interposed in the signal path between the input terminal and the voltage-controlled amplifier. A weighing control path (46) provides the control signal for the voltage-controlled low pass filter. A two-pole high pass filter (18) followed by a level sensor (48) is interposed in the weighting control path.