Radio receiver with increased dynamic range

Details Radio receiver with increased dynamic range Radio receiver with increased dynamic range

1993-08-11

1995-07-04

Urban, Edward F.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency or phase modulation

455295, 455303, 455306, 455314, H04B 110

Patent

active

054308933

ABSTRACT:
A radio receiver front end having both feedforward and feedback mechanisms to suppress the amplitude of spurious signals so as to prevent those signals from flooding the dynamic range of the mixer of the front end. An illustrative embodiment of the present invention comprises splitting the input signal into a first signal and a second signal, creating a third signal based on the difference of the first signal and a difference signal, mixing down the third signal with a first oscillatory signal, isolating a feedback signal from the mixed down signal, mixing up the feedback signal with a second oscillatory signal and creating the difference signal based on the difference of the second signal and the mixed up signal.

REFERENCES:
patent: 3611169 (1971-10-01), Hess et al.
patent: 4166251 (1979-08-01), Ishigaki et al.
patent: 4246541 (1981-01-01), Ishigaki
patent: 5222106 (1993-06-01), Satoh et al.

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