Circuit for compensating temperature of automatic gain...

Details Circuit for compensating temperature of automatic gain... Circuit for compensating temperature of automatic gain...

2005-09-06

2005-09-06

Nguyen, Duc M. (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S240100, C455S249100, C455S127200, C330S289000, C330S278000, C330S284000

Reexamination Certificate

active

06941122

ABSTRACT:
A circuit for compensating temperature of an automatic gain control (AGC) circuit includes a low noise amplifier (LNA) for amplifying a received radio frequency (RF) signal, an attenuation control unit for generating an attenuation control signal by sensing the amplified RF signal, and a PIN diode attenuator for attenuating the RF signal inputted to the LNA by driving the PIN diode with an attenuation control signal. A temperature compensation unit for compensating an attenuation change amount of the PIN diode caused by the change of temperature compensates the voltage change between the PIN diodes by using an additional PIN diode having identical characteristic of temperature as the PIN diode of the PIN diode attenuator.

REFERENCES:
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patent: 000570897 (1993-11-01), None

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