Motorola Corporation

Cincinnati Electronics Corporation

Charles A Bucher

Robert Henry Bickley

David Moon Yee

Frank A Wissel

Pin diodes connected in parallel with a high power RF carrying reed relay are forward biased for conduction when the reed relay is actuated and reverse biased once the reed relay closes so that they are removed from the circuit. Trigger apparatus, including a one-shot circuit, is utilized to activate the diodes for only the required length of time and to provide the correct operation at all frequencies with high power.

High power RF relay switch trigger

A portable radio receiver powered by a battery includes an RF amplifier, an IF amplifier and an audio amplifier powered by a first regulated, switched, DC power converter that derives a first DC voltage. A frequency synthesizer, including varactor diodes, is powered by a second regulated, switched DC power converter that derives a second DC voltage. Digital circuitry included in the synthesizer is powered by opposite polarity, third and fourth power converters. A synchronizing source for switching all of the power converters simultaneously has a fundamental and harmonics outside of the bandpasses of the audio and IF amplifiers to minimize the injection of spurious signals by the power converters into the amplifiers. The synchronizing source is FM modulated by an audio source so that harmonics of the synchronizing source are spread over a predetermined spectrum and the harmonics have noise-like characteristics spread over relatively wide frequency ranges.

Growing community of inventors

Scottsdale, AZ, United States of America

Charles A Bucher