Second intercept point (IP2) calibrator and method for...

Details Second intercept point (IP2) calibrator and method for... Second intercept point (IP2) calibrator and method for...

2011-08-16

2011-08-16

Urban, Edward (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S333000, C455S305000, C455S311000, C455S298000

Reexamination Certificate

active

08000676

ABSTRACT:
A second intercept point (IP2) calibrator and a method for calibrating IP2 are disclosed. The IP2 calibrator and the method for calibrating IP2 remove any direct current (DC) offset by comparing a common-mode reference voltage with the common-mode voltage measured between a first output terminal and a second output terminal of a mixer, and calibrates the IP2 of the mixer by comparing the common-mode voltage with a calibration reference voltage. The calibration reference voltage is independent of the common-mode reference voltage and may be a quantized variable voltage generated according to digital control code.

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“A Direct Conversion Receiver With an IP2 Calibrator for CDMA/PCS/GPS/AMPS Applications”, Woonyun Kim et al., IEEE Journal of Solid-State Circuits, vol. 41, No. 7, Jul. 2006.

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