Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1984-04-02
1986-02-25
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307270, 328160, G06G 712
Patent
active
045729751
ABSTRACT:
An analog multiplier circuit for multiplying X and Y input voltage signals and using two differential amplifiers to produce a multiplied output, in which separate pairs of transistors provide base drive currents to the amplifier transistors, one pair being associated with each amplifier. Trimming voltages are applied between the bases of each transistor pair to independently adjust the base voltage offsets. Nonlinearities between the multiplier output and the X input are reduced by appropriate trimming of the transistor base voltage differentials. Each of the differential amplifier transistors has a common base connection with a matching transistor that carries a current which is complementary to the amplifier transistor current with respect to the Y input signal, thereby reducing output nonlinearities with respect to the Y input signal by making the total base drive currents of both transistors substantially independent of the Y voltage signal. Separate current sources also supply the standing base currents for the transistors of one of the amplifiers, thereby correcting for static imbalances in the base drive circuitry.
REFERENCES:
patent: 4157512 (1979-06-01), Schmoock
patent: 4308471 (1981-12-01), Misawa
patent: 4482977 (1984-11-01), Ross
B. Gilbert, "A Precise Four-Quadrant Multiplier with Subnansecond Reponse", IEEE J. Solid-State Circuits, vol. SC-3, pp. 365-373, Dec. 1968.
B. Gilbert, "A High-Performance Monolithic Multiplier Using Active Feedback", IEEE J. Solid-State Circuits, vol. SC-9, pp. 364-373, Dec. 1974.
B. Gilbert, "A Four-Quadrant Analog Divider/Multiplier with 0.01% Distortion", IEEE International Solid-State Circuits Conference, Feb. 25, 1983.
Davis B. P.
Miller Stanley D.
Precision Monolithics, Inc.
LandOfFree
Analog multiplier with improved linearity does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Analog multiplier with improved linearity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analog multiplier with improved linearity will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1013781