Method and a device for conserving power in a battery powered tr

Details Method and a device for conserving power in a battery powered tr Method and a device for conserving power in a battery powered tr

1997-11-13

1998-09-29

Louis-Jacques, Jacques H.

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455 383, 455343, H04B 138

Patent

active

058158219

ABSTRACT:
A method and a device for conserving power in a battery powered transceiver, the transceiver comprising a transmitter (10) and a receiver (11) having receiving circuits including an input high frequency stage (12), a first mixer (13), and a first local oscillator (14). A transmit control signal is obtained when a transmitter of the transceiver is transmitting, the receiving circuits are biased to full operating level as a response to the transmit control signal, and a bias control signal is generated as a function of the transmit control signal and of a received signal strength indicating signal. At least one of the receiving circuits is then biased to a second level controlled by the bias control signal the receiving circuits comprises at least one transistor (T.sub.1 ;T.sub.2) and a biasing resistor network. A central unit (21) is operatively connected to the resistor network of at least one of the receiving circuits for controlling the biasing level of the transistor (T.sub.1 ;T.sub.2).

REFERENCES:
patent: 4631496 (1986-12-01), Borras et al.
patent: 4897560 (1990-01-01), Saito et al.
patent: 5001776 (1991-03-01), Clark
patent: 5179724 (1993-01-01), Lindoff

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