Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1995-08-24
1997-01-28
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330253, 330254, 330257, 330260, H03F 345
Patent
active
055981291
ABSTRACT:
An operational transconductance amplifier (500) includes an input stage (502) having a first and second amplifiers (504, 508) driving class-AB, push-pull amplifiers (506, 510). The input stage (502) receives a differential input signal at first and second amplifier inputs (528, 540). The push-pull amplifiers (506, 510) establish differential currents in a transconductance-setting resistor (512), thereby eliminating the need for static current sources. The biasing levels established by the first and second amplifiers (504, 508) to drive the push-pull amplifiers (506, 510) also control a current source (514). Currents from the current source (514) are summed and provided to amplifier outputs (594, 596).
REFERENCES:
patent: 4897612 (1990-01-01), Carroll
patent: 4912423 (1990-03-01), Milkovic et al.
patent: 5028881 (1991-07-01), Jackson
patent: 5323120 (1994-06-01), Ryat
patent: 5363061 (1994-11-01), Barrett, Jr. et al.
patent: 5382838 (1995-01-01), Sasaki et al.
patent: 5392003 (1995-02-01), Nag et al.
patent: 5404097 (1995-04-01), Barou
Hogervost et al., "FA 14.1: A Compact Power-Efficient 3V CMOS Rail-to-Rail Input/Output Operational Amplifier for VLSI Cell Libraries", IEEE International Solid-State Circuits Conference, 1994, pp. 244-245.
Willingham et al., "A BiCMOS Low-Distortion 8-Mhz Low-Pass Filter", IEEE Journal of Solid-State Circuits, vol. 28, No. 12, pp. 1234-1245, Dec. 1993 .
Motorola Inc.
Mullins James B.
Rauch John G.
LandOfFree
Low current drain operational transconductance 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 Low current drain operational transconductance amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low current drain operational transconductance amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-943780