Method and apparatus for suppressing spurious third-order respon

Details Method and apparatus for suppressing spurious third-order respon Method and apparatus for suppressing spurious third-order respon

1995-01-10

1996-12-31

Pham, Chi H.

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

455295, 455296, 370278, H04B 110

Patent

active

055904114

ABSTRACT:
Apparatus and a method for inhibiting spurious responses in the receiver stage of a radio telephone are disclosed. A detector detects the transmission of an RF signal from the transceiver and sends a control signal indicative of such transmission to a linearity controller. The linearity controller is coupled to non-linear devices in the receiver stage of a transceiver and varies the linearity of the non-linear devices in accordance with the control signal. Preferably, the linearity is varied by increasing the bias current or voltage for the non-linear devices when the control signal indicates transmission of an RF signal.

REFERENCES:
patent: 4637073 (1987-01-01), Selin et al.
patent: 5212815 (1993-05-01), Schumacher
patent: 5239686 (1993-08-01), Downey
patent: 5428824 (1995-06-01), Kasai

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