Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Patent
1997-09-15
1999-11-02
Wong, Peter S.
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
323313, G05F 316
Patent
active
059777605
ABSTRACT:
A bipolar OTA having an improved S/N level is provided, which includes first, second, and third balanced differential pairs. The first balanced differential pair is formed by first and second bipolar transistors whose emitters are connected to one another through a common emitter resistor. The first and second transistors are driven by corresponding constant current sources/sinks, respectively. The second balanced differential pair is formed by third and fourth transistors whose emitters are coupled together to be connected to a collector of the first transistor. The third balanced differential pair is formed by fifth and sixth transistors whose emitters are coupled together to be connected to a collector of the second transistor. The third and fourth balanced differential pairs are driven by the collector currents of the first and second transistors, respectively. A control voltage is applied across bases of the third and fourth transistors and bases of the fifth and sixth transistors. A balanced differential input voltage is applied across bases of the first and second transistors. An OTA output is derived from at least one of the collectors of the third and fifth transistors.
REFERENCES:
patent: 3899744 (1975-08-01), Kominami
patent: 4182962 (1980-01-01), Taguchi et al.
patent: 4536702 (1985-08-01), Nagano
patent: 4684880 (1987-08-01), Chan
patent: 4864248 (1989-09-01), Jansen
patent: 4942369 (1990-07-01), Nakagawara et al.
patent: 5241227 (1993-08-01), Jung et al.
patent: 5349285 (1994-09-01), Okanobu
patent: 5442311 (1995-08-01), Trafton
patent: 5644217 (1997-07-01), Kusaba
Barrie Gilbert, "A Precise Four-Quadrant Multiplier with Subnanosecond Response", IEEE Journal of Solid-State Circuits, vol. SC-3, No. 4, Dec. 1968, pp. 365-373.
NEC Corporation
Vu Bao Q.
Wong Peter S.
LandOfFree
Bipolar operational transconductance amplifier and output circui does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bipolar operational transconductance amplifier and output circui, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bipolar operational transconductance amplifier and output circui will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2140156