Voltage adder/subtractor circuit with two differential transisto

Details Voltage adder/subtractor circuit with two differential transisto Voltage adder/subtractor circuit with two differential transisto

1997-08-19

1999-06-01

Ton, My-Trang Nu

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

Combining of plural signals

327355, G06G 716

Patent

active

059091371

ABSTRACT:
A voltage adder/subtractor circuit is provided, which has an improved frequency characteristic and which is operable at a low supply voltage such as approximately 1.1 V. This circuit includes a first differential pair of emitter/source-coupled first and second transistors driven by a first constant current, and a second differential pair of emitter/source-coupled third and fourth transistors driven by a second constant current having a same current value as that of the first constant current. A third constant current source/sink serving as a common load for the second and third transistors is connected to the collector/drain of the second transistor and the coupled collector/drain and base/gate of the third transistor. The third constant current source/sink supplies/sinks a third constant current having a same current value as that of the first constant current. A first input voltage is differentially applied across bases/gates of the first and second transistors. A second input voltage is applied to a base/gate of the fourth transistor. An output voltage is derived from the base/gate of the third transistor.

REFERENCES:
patent: 4965468 (1990-10-01), Nicollini et al.
patent: 5444648 (1995-08-01), Kimura
patent: 5517134 (1996-05-01), Yaklin
patent: 5576653 (1996-11-01), Kimura
patent: 5581210 (1996-12-01), Kimura
patent: 5712810 (1998-01-01), Kimura

Affiliated with

Also associated with

Rating

Voltage adder/subtractor circuit with two differential transisto does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Voltage adder/subtractor circuit with two differential transisto, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Voltage adder/subtractor circuit with two differential transisto will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-957282