Device comprising a feedback-less gain controlled amplifier

Amplifiers – With semiconductor amplifying device – Including plural stages cascaded

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C330S254000

Reexamination Certificate

active

07821342

ABSTRACT:
Devices (1,2) comprising feedback-less amplifiers (16,19,26,29) that are gain controlled introduce linear relationships between output signals and input signals of the feedback-less amplifiers (16,19,26,29) by providing the feedback-less amplifiers (16,19,26,29) sub-circuits in the form of first transistors (33) operated in their triode regions for receiving input signals and second sub-circuits in the form of second transistors (34) for receiving control signals and third sub-circuits in the form of resistors (35) for generating output signals, whereby the respective first and second and third sub-circuits form a serial path. Second circuits (4) receive gain signals and convert the gain signals into the control signals. The control signals are copies of the gain signals. The second circuits (4) comprise current sources (6) and third and fourth transistors (41,42). The current sources (6) comprise fifth and sixth transistors (61,62). The second circuits (4) further comprise voltage sources (9) further current sources. Third circuits (8) compensate common mode currents.

REFERENCES:
patent: 5999052 (1999-12-01), Tang
patent: 6229374 (2001-05-01), Tammone, Jr.
patent: 6472936 (2002-10-01), Jones
patent: 6791413 (2004-09-01), Komurasaki et al.
patent: 2002/0048109 (2002-04-01), Chaiken et al.
patent: 2004/0119536 (2004-06-01), Kwon et al.
patent: 2004/0135632 (2004-07-01), Kwon et al.
patent: 1513252 (2005-03-01), None
Shi, Bo; et al “A 200-MHZ IF BICMOS Signal Component Separator for Linear Linc Transmitters” IEEE Journal of Solid-State Circuits, IEEE Service Center, vol. 35, No. 7, Jul. 2000, pp. 987-993.
International Search Report dated Jan. 26, 2007 in connection with PCT Application No. PCT/IB2006/052226.
Written Opinion of the International Searching Authority dated Jan. 4, 2008 in connection with PCT Application No. PCT/IB2006/052226.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Device comprising a feedback-less gain controlled amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device comprising a feedback-less gain controlled amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device comprising a feedback-less gain controlled amplifier will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4223117

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.