Heterodyne receiver

Details Heterodyne receiver Heterodyne receiver

2011-06-14

2011-06-14

Nguyen, Lee (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S245200, C455S251100

Reexamination Certificate

active

07962112

ABSTRACT:
A heterodyne receiver comprising a gain controllable RF mixer (14) which has a first input connected to a first local oscillator (16) and a second input connected to an RF input. The receiver comprises a peak detector (38) which detects a peak value of an input signal at the second input of the HF mixer and generates a digital control signal if it is determined that the peak value of the input signal is above a predetermined level. A digital automatic gain control circuit (34) decreases upon reception of the digital control signal the gain of the RF mixer.

REFERENCES:
patent: 5001776 (1991-03-01), Clark
patent: 6718165 (2004-04-01), Ha
patent: 2006/0135104 (2006-06-01), Lee et al.
patent: 2009/0163165 (2009-06-01), Oomoto
patent: 1 241 782 (2002-09-01), None
patent: WO 2006/106503 (2006-10-01), None

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