Noise cancellation circuit and amplifier with noise...

Details Noise cancellation circuit and amplifier with noise... Noise cancellation circuit and amplifier with noise...

2009-05-26

2011-10-25

Dean, Raymond (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

C455S063100, C455S067130, C375S346000

Reexamination Certificate

active

08045949

ABSTRACT:
A noise cancellation circuit, which reduces noise in an output signal of an amplifier having an input resistance, a feedback resistance, and an operational amplifier, has: a first mixer circuit, which input an input signal across a first input terminal and a second input terminal of the operational amplifier, and performs frequency conversion of the input signal according to a first frequency signal; a noise cancellation amplifier, which amplifies an output signal of the first mixer circuit; a second mixer circuit, which performs frequency conversion of an output signal of the noise cancellation amplifier according to the first frequency signal; and a signal supply circuit, which supplies an output signal of the second mixer circuit to the first input terminal of the operational amplifier via an output resistance.

REFERENCES:
patent: 2004/0150457 (2004-08-01), Miyagi
patent: 2007/0010228 (2007-01-01), Schelmbauer et al.
patent: 2007/0177693 (2007-08-01), Kluge
patent: 2009/0088124 (2009-04-01), Schuur et al.
patent: 2007-6493 (2007-01-01), None
patent: WO 03/003561 (2003-01-01), None

Affiliated with

Also associated with

Rating

Noise cancellation circuit and amplifier with noise... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Noise cancellation circuit and amplifier with noise..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Noise cancellation circuit and amplifier with noise... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4299869