Patrick J Conway

US Patent:

53651901, Nov 15, 1994

Filed:

May 3, 1993

Appl. No.:

8/055314

Inventors:

David U. L. Yu - Rancho Palos Verdes CA
Patrick H. Conway - Rancho Palos Verdes CA

Assignee:

Duly Research, Inc. - Rancho Palos Verdes CA

International Classification:

H03L 700

US Classification:

330149

Abstract:

Phase and amplitude modifications in repeatable RF pulses at the output of a high power pulsed microwave amplifier are made utilizing a digital feed-forward correction system. A controlled amount of the output power is coupled to a correction system for processing of phase and amplitude information. The correction system comprises circuitry to compare the detected phase and amplitude with the desired phase and amplitude, respectively, and a digitally programmable phase shifter and attenuator and digital logic circuitry to control the phase shifter and attenuator. The Phase and amplitude of subsequent are modified by output signals from the correction system.

US Patent:

53941225, Feb 28, 1995

Filed:

Sep 28, 1992

Appl. No.:

7/952065

Inventors:

Patrick H. Conway - Rancho Palos Verdes CA
David U. L. Yu - Rancho Palos Verdes CA

Assignee:

Duly Research Incorporated - Rancho Palos Verdes CA

International Classification:

H03H 720

US Classification:

333156

Abstract:

A digital-to analogue converter for producing an RF output signal proportional to a digital input word of N bits from an RF reference input, N being an integer greater or equal to 2. The converter comprises a plurality of power splitters, power combiners and a plurality of mixers or RF switches connected in a predetermined configuration.