Linear transconductor for RF communications

Details Linear transconductor for RF communications Linear transconductor for RF communications

2007-06-12

2011-12-27

Trinh, Sonny (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S333000, C455S241100

Reexamination Certificate

active

08086207

ABSTRACT:
The present patent application comprises a linear transconductor having at least one input and at least one output, comprising a differential amplifier having a plurality of transistors and a plurality of inputs, wherein a difference of input signals is amplified, a cascode circuit having a plurality of transistors, wherein the transistors are operably connected to the differential amplifier, wherein reverse isolation between an input and an output of the linear transconductor is improved by decoupling the input and the output of the linear transconductor by mounting at least one transistor of the plurality of transistors of the cascode circuit as a common-gate stacked on the at least one transistor of the differential amplifier, an active load having a plurality of transistors operably connected between the cascode circuit and supply voltage, and an auxiliary device operably connected to the connection between the active load, the cascode device and ground.

REFERENCES:
patent: 4720685 (1988-01-01), Garuts
patent: 5498953 (1996-03-01), Ryat
patent: 5587687 (1996-12-01), Adams
patent: 6597303 (2003-07-01), Cosand
patent: 6828832 (2004-12-01), Gabillard
patent: 7109796 (2006-09-01), Heigelmayer et al.
patent: 7339433 (2008-03-01), Bhatacharya et al.
patent: 7554403 (2009-06-01), Sakurai
patent: 2002/0055341 (2002-05-01), Otaka et al.
patent: 2002/0089377 (2002-07-01), Hwang
patent: 2003/0001674 (2003-01-01), Nagaraj
patent: 2005/0017784 (2005-01-01), Takenaka
patent: 2005/0213532 (2005-09-01), Liu et al.
patent: 2006/0135109 (2006-06-01), Klumperink et al.
patent: 57148914 (1982-09-01), None
patent: 2001230637 (2001-08-01), None
patent: 2002111417 (2002-04-01), None
patent: 2002185272 (2002-06-01), None
patent: 2004274564 (2004-09-01), None
patent: 2006186696 (2006-07-01), None
International Search Report and Written Opinion—PCT/US2008/057319—International Searching Authority, European Patent Office, Jun. 16, 2008.
Pan T-W et al: “A 50-DB Variable Gain Amplifier Using Parasitic Bipolar Transistors in CMOS” IEEE Journal of Solid-State Circuits, IEEE Service Center, Piscataway, NJ, US, vol. 24, No. 4, Aug. 1, 1989, pp. 951-961, XP000066223 ISSN: 0018-9200.

Affiliated with

Also associated with

Rating

Linear transconductor for RF communications does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Linear transconductor for RF communications, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Linear transconductor for RF communications will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4305372