Mixer gain control with gain tracking offsets

Details Mixer gain control with gain tracking offsets Mixer gain control with gain tracking offsets

2005-06-27

2008-10-07

Urban, Edward (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S250100, C330S278000

Reexamination Certificate

active

07433662

ABSTRACT:
An apparatus and method to use a gain control network across source terminals of cascode transistors that drive a differential current to control gain. The drains of the cascode transistors are coupled to a load such as a mixer. The cascode arrangement provides high impedance coupling to the load and the proximity of the gain control network allows offsets to be gain tracked to signal gain.

REFERENCES:
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patent: 6040731 (2000-03-01), Chen et al.
patent: 6046640 (2000-04-01), Brunner
patent: 6594504 (2003-07-01), Grasset
patent: 7257382 (2007-08-01), Arai et al.
patent: 2006/0094395 (2006-05-01), Lee et al.
“5-GHz CMOS Radio Transceiver Front-End Chipset”; Ting-Ping Liu et al.; IEEE Journal of Solid-State Circuits, vol. 35, No. 12; Dec. 2000; pp. 1927-1933.

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