Steven S Hand

US Patent:

43132103, Jan 26, 1982

Filed:

Jan 31, 1980

Appl. No.:

6/117402

Inventors:

Edward F. Hume - Fort Worth TX
Steven C. Hand - Fort Worth TX

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04B 104

US Classification:

455117

Abstract:

Sense voltages representative of transmitter power and the temperature of the transmitter output stage are summed and fed to the input of a high gain amplifier. The output of the amplifier provides bias to the transmitter driver stage and, thus, controls the total transmitter developed power. The resulting overall feedback system provides precise transmitter power control and output stage thermal protection.

US Patent:

20150109035, Apr 23, 2015

Filed:

Oct 18, 2013

Appl. No.:

14/057276

Inventors:

- Waltham MA, US
Steven Hand - Fort Wayne IN, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H03L 7/189
H03L 7/093
H03L 7/089

US Classification:

327157, 327159

Abstract:

A loop filter for a phase locked loop (PLL) having fast tuning capability while limiting phase noise. The filter includes a fine tune input port to receive a fine tune signal from the phase detector and a coarse tune input port to receive a coarse tune signal from the coarse tuner. The external coarse tuner provides the majority of the voltage slew on the loop filter while a fine tune control, thus reducing tune time. in one embodiment, the loop filter includes a voltage divider to limit the effective tuning sensitivity and thus control noise induced on a voltage-controlled oscillator from the loop filter. An elliptical filter may be employed to attenuate fractional spurs within the filter output signal.