Donald S Tait

US Patent:

61155845, Sep 5, 2000

Filed:

Apr 2, 1999

Appl. No.:

9/285308

Inventors:

Donald L. Tait - Torrance CA
Eric L. Upton - Redondo Beach CA
Franklin J. Bayuk - Rancho Palos Verdes CA

Assignee:

TRW Inc. - Redondo Beach CA

International Classification:

H04Q 732

US Classification:

455 73

Abstract:

A transmitter-receiver includes a transmitting circuit for providing an output by converting the frequency of a transmission signal input thereto, a receiving circuit for providing an output by converting the frequency of a received signal input thereto, and a local oscillator which generates an oscillation signal having a local oscillating frequency based on a reference signal. A local oscillator signal splitter is connected to the local oscillator and splits the oscillation signal into substantially similar transmit and receive oscillation signals each at the local oscillating frequency. The local oscillator signal splitter supplies the transmit oscillation signal to the transmitting circuit and supplies the receive oscillation signal to the receiving circuit. The transmitting circuit converts the frequency of the transmission signal in accordance with said transmit oscillation signal, and the receiving circuit converts the frequency of the received signal in accordance with the receive oscillation signal.