Squaring circuit capable of widening a range of an input voltage

Details Squaring circuit capable of widening a range of an input voltage Squaring circuit capable of widening a range of an input voltage

1995-08-11

1996-12-03

Wambach, Margaret Rose

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

Combining of plural signals

327103, 327349, G06F 7556

Patent

active

055812112

ABSTRACT:
In a squaring circuit which responds to an input voltage to produce an output current and which is specified by a squaring characteristic between the input voltage and the output current, first, second, and third transistors are connected in common to a constant current source while the first and the second transistors are connected to input terminals for the input voltage and also connected in common to a single output terminal. The third transistor is connected to another output terminal and supplied with a d.c. voltage as a control signal. The output current appears between the output terminals as a differential output current. The squaring characteristic is kept even when the input voltage is widely varied. Each of the first through the third transistors may be either a bipolar transistor or a MOS transistor.

REFERENCES:
patent: 3793480 (1974-02-01), Waehner
patent: 4546275 (1985-10-01), Pena-Final et al.
patent: 5357149 (1994-10-01), Kimura
Kimura, Katsuji, "A Unified Analysis of Four-Quadrant Analog Multipliers Consisting of Emitter and Source-Coupled Transistors Operable on Low Supply Voltage", IEICE Transactions on Electronics, vol. 376-C, No. 5, May 1993, pp. 714-737.

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