Wideband resistive input mixer with noise-cancelled impedance

Details Wideband resistive input mixer with noise-cancelled impedance Wideband resistive input mixer with noise-cancelled impedance

2008-06-11

2011-10-18

Phu, Sanh (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

C455S323000, C455S333000, C455S334000, C455S338000, C327S359000, C327S552000, C327S355000

Reexamination Certificate

active

08041327

ABSTRACT:
A radio frequency (RF) mixing circuit including a quadrature mixer that receives non-overlapping in-phase and quadrature local oscillator (LO) signals, and a plurality of low noise amplifiers (LNAs) operatively connected to the quadrature mixer, the plurality of LNAs presenting an input impedance at a baseband. A first voltage at an input node of the quadrature mixer is equal to a second voltage across the impedance up-converted to a frequency of a LO signal received by the quadrature mixer. The second voltage across the LNA input impedance includes a frequency of an input signal of the quadrature mixer down-converted by a frequency of the in-phase and quadrature LO signals and filtered by the impedance. The quadrature mixer down-converts an input signal by a frequency of the in-phase and quadrature LO signals and transfers the noise cancelled impedance to a RF to achieve a noise cancelled match.

REFERENCES:
patent: 6417737 (2002-07-01), Moloudi et al.
patent: 7016664 (2006-03-01), Souetinov
patent: 7460844 (2008-12-01), Molnar et al.
patent: 7679431 (2010-03-01), Chang et al.
patent: 7816970 (2010-10-01), Kim
patent: 2007/0230558 (2007-10-01), Sjoland et al.
patent: 2010/0260289 (2010-10-01), Sorrells et al.
Darabi, H., “A Blocker Filtering Technique for SAW-Less Wireless Receivers,” IEEE Journal of Solid-State Circuits, vol. 42, No. 12, Dec. 2007, pp. 2766-2773.
Zhou et al., “A CMOS Passive Mixer With Low Flicker Noise for Low-Power Direct Conversion Receiver,” IEEE Journal of Solid-State Circuits, vol. 40, No. 5, May 2005, pp. 1084-1093.

Affiliated with

Also associated with

Rating

Wideband resistive input mixer with noise-cancelled impedance does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Wideband resistive input mixer with noise-cancelled impedance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wideband resistive input mixer with noise-cancelled impedance will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4276580