James L Daniel

US Patent:

42702216, May 26, 1981

Filed:

Oct 17, 1979

Appl. No.:

6/085548

Inventors:

James W. Daniel - Cherry Hill NJ

Assignee:

RCA Corporation - New York NY

International Classification:

H04B 116

US Classification:

455208

Abstract:

A radio receiver includes a phaselocked loop including a main phase detector which accomplishes both carrier extraction and demodulation of an FM orderwire signal. The loop bandwidth characteristic is made suitable for de-emphasis of the FM orderwire audio signal, and the output of a quadrature phase detector is applied as a divisor to an analog divider in the phaselocked loop to cause the bandwidth of the phaselocked loop to remain substantially constant despite changes in input signal level.

US Patent:

42130964, Jul 15, 1980

Filed:

Apr 26, 1978

Appl. No.:

5/900129

Inventors:

James W. Daniel - Camden NJ

Assignee:

RCA Corporation - New York NY

International Classification:

H04B 116

US Classification:

455260

Abstract:

A phaselock loop in a phaselock receiver includes a voltage-controlled oscillator, and a main phase detector receptive to an output of the oscillator and a received signal. Means to detect when the oscillator is phase locked with the received signal includes a quadrature phase detector receptive to a quadrature-phase-shifted oscillation from the oscillator and the received signal. Means are provided to subtract the direct-current component of the output of the main phase detector from the direct-current component of the output of the quadrature phase detector to provide a phaselock-indicating signal which is substantially zero when the oscillator is out-of-lock with the received signal, and which is high when the oscillator is in-lock with the received signal.

US Patent:

44792530, Oct 23, 1984

Filed:

Jan 18, 1982

Appl. No.:

6/340453

Inventors:

James W. Daniel - Cherry Hill NJ

Assignee:

RCA Corporation - New York NY

International Classification:

H04B 1700
H04B 116

US Classification:

455226

Abstract:

In a communications receiver where the AGC signal derived from a phaselock detector is used to measure input signal strength, and that measurement is subject to error as a result of the nonlinear devices used in the carrier demodulation, a signal having inversely corresponding error characteristics is summed to the phaselock detector AGC signal to produce an improved AGC signal which is substantially linearly related to the input signal. That signal, having the inversely corresponding error characteristics, has been found to be the signal representation of the envelope of either the positive or negative cycles of the input signal.