Local oscillator using I/Q mismatch compensating circuit...

Details Local oscillator using I/Q mismatch compensating circuit... Local oscillator using I/Q mismatch compensating circuit...

2006-10-03

2006-10-03

Trinh, Sonny (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Panoramic display

C455S208000, C455S255000

Reexamination Certificate

active

07116953

ABSTRACT:
A local oscillator provides an in-phase local oscillating signal and quadrature-phase signal to first and second mixers outputting an input signal with a mixed in-phase local oscillating signal and quadrature-phase local oscillating signal, respectively. The oscillator comprises a local oscillator having first and second delay cells and outputting said in-phase local oscillating signal and said quadrature-phase local oscillating signal; and a correction circuit for controlling phase matching characteristics, said correction circuit setting bias current flowing in said first and second delay cells of said local oscillator as being to be different. In another embodiment, the phase matching characteristic is controlled by setting the bias voltage applied to the first and second delay cells as being to be different, by setting the width of the active device included in the first and second delay cells dells as being to be different, or by setting impedance of passive device to be different.

REFERENCES:
patent: 4394626 (1983-07-01), Kurihara et al.
patent: 6313688 (2001-11-01), Lee et al.
patent: 6670900 (2003-12-01), Zhang
patent: 6760577 (2004-07-01), Li
patent: 6892060 (2005-05-01), Zheng
patent: 2002/0051091 (2002-05-01), Dedieu et al.
patent: 2002/0177425 (2002-11-01), Li
patent: 2003/0003891 (2003-01-01), Kivekas et al.
patent: 2003/0109241 (2003-06-01), Kim
patent: 2003/0206603 (2003-11-01), Husted
patent: 2004/0038649 (2004-02-01), Lin et al.
patent: 2004/0219884 (2004-11-01), Mo et al.
patent: 2005/0008107 (2005-01-01), Brown
patent: 2005/0041754 (2005-02-01), Wu et al.
patent: 2005/0047536 (2005-03-01), Wu et al.

Affiliated with

Also associated with

Rating

Local oscillator using I/Q mismatch compensating circuit... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Local oscillator using I/Q mismatch compensating circuit..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Local oscillator using I/Q mismatch compensating circuit... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3716915