Apparatus and method for detecting a phase difference

Details Apparatus and method for detecting a phase difference Apparatus and method for detecting a phase difference

2006-07-04

2006-07-04

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S156000, C327S002000

Reexamination Certificate

active

07071744

ABSTRACT:
A method for detecting a phase difference between a first input signal and a second input signal is provided. The method contains: detecting the phase difference of the first and the second input signals to produce an output signal; generating a first voltage according to a first level of the output signal; generating a second voltage according to a second level of the output signal; and comparing the first voltage and the second voltage to produce the information regarding the phase difference between the first and the second input signals.

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Gabriel Brenna, et al., A 2GHz Direct-Conversion WCDMA Modulator in 0.25um CMOS, 2002 IEEE International Solid-State Circuits Conference.
Behzad Razavi, Design Considerations for Direct-Conversion Receivers, IEEE Transactions on Circuits and Systems-II: Analog and Digital Signal Processing, vol. 44 No. 6, Jun. 1997.

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