Mixer gain calibration method and apparatus

Details Mixer gain calibration method and apparatus Mixer gain calibration method and apparatus

2005-11-16

2008-10-21

Jackson, Blane J (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S232100

Reexamination Certificate

active

07440742

ABSTRACT:
A gain calibration circuit comprises a generator that generates a constant overdrive voltage that biases a radio frequency (RF) mixer. A reference signal generator generates a reference signal. A comparator receives the reference signal and a second signal that is a function of a mixer bias current flowing through the RF mixer and that generates a difference signal. An adjustment circuit adjusts a transconductance gain of the RF mixer based on the difference signal.

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