Hysteresis-free anti-saturation circuit

Details Hysteresis-free anti-saturation circuit Hysteresis-free anti-saturation circuit

1996-12-30

1999-01-19

Le, Thanh Cong

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

4552501, 455254, H04B 106

Patent

active

058624651

ABSTRACT:
An anti-saturation circuit controls the gain of a variable-gain element in the front-end section of a receiver, responsive to a desired signal strength indicated by an indicator signal. The gain of the variable-gain element varies monotonically over a certain range, being reduced as the desired signal strength increases, in order to avoid intermodulation of the desired signal with an interfering signal. If the receiver also has an automatic-gain-control circuit, the automatic-gain-control signal is adjusted to compensate for the changing gain of the variable-gain element.

REFERENCES:
patent: 4553105 (1985-11-01), Sasaki
patent: 4742565 (1988-05-01), Iwahashi
patent: 5036527 (1991-07-01), Halim et al.
patent: 5377231 (1994-12-01), Sonntag
patent: 5507023 (1996-04-01), Suganuma et al.
patent: 5603114 (1997-02-01), Tomita

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