High impedance bias circuit for AC signal amplifiers

Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

327 87, 327540, 327541, G05F 110

Patent

active

059492740

ABSTRACT:
The present invention discloses an integrated constant bias voltage generator using only active devise to simulate a high impedance node, as seen from a capacitively coupled input signal. A reference current source an MOS device are coupled in series between Vcc and ground with the drain electrode of the MOS device being the constant bias voltage output. An input signal capacitively coupled to said drain electrode introduces an error current monitored by a current monitoring means. A feedback means responsive to the current monitoring means modulates the control input of the MOS device to select a IDS vs. VDS characteristic curve which will maintain the VDS voltage constant for any given IDS current, including the error current. The feedback means also compensates for voltage fluctuations in Vcc.

REFERENCES:
patent: 4264874 (1981-04-01), Young
patent: 4396883 (1983-08-01), Holloway et al.
patent: 5168209 (1992-12-01), Thiel
patent: 5317280 (1994-05-01), Zimmer et al.
patent: 5467052 (1995-11-01), Tsukada
patent: 5570060 (1996-10-01), Edwards
patent: 5592121 (1997-01-01), Jung et al.
patent: 5598122 (1997-01-01), McClure
patent: 5805010 (1998-09-01), Wu

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

High impedance bias circuit for AC signal amplifiers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High impedance bias circuit for AC signal amplifiers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High impedance bias circuit for AC signal amplifiers will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1807797

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