Power saving portable radio communication device with diversity

Details Power saving portable radio communication device with diversity Power saving portable radio communication device with diversity

1995-01-27

1996-10-15

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Plural receivers

455134, 455135, 455272, 4552771, 375347, H04B 1702

Patent

active

055663648

ABSTRACT:
Electric field intensity of a signal corresponding to a plurality of receivers and received through antennas are converted into direct currents. The converted direct currents thus converted are fed to an electric field level detection circuit. The electric field level detection circuit detects the electric field level on the basis of the direct currents of respective receivers and feeds a detection signal to a control portion. The control portion compares the electric field level corresponding to the direct current value in said controller with a predetermined electric field level to make judgement that the received electric field is a strong electric field and stable. Then, a command is issued to keep one of the receivers, at which the higher electric field level is detected and to turn off other receiver. An electric power source control portion performs switching of the switch portions corresponding to respective of the receivers to supply only one of the receiver from a power source and to block power supply from the power source to other receivers.

REFERENCES:
patent: 4479261 (1984-10-01), Oda et al.
patent: 4823398 (1989-04-01), Hashimoto
patent: 5274843 (1993-12-01), Murai et al.
patent: 5390357 (1995-02-01), Nobusawa et al.

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