Bipolar multiplier having wider input voltage range

Details Bipolar multiplier having wider input voltage range Bipolar multiplier having wider input voltage range

1996-05-21

1998-06-09

Mai, Tan V.

Boots, shoes, and leggings

327359, G06G 716

Patent

active

057645590

ABSTRACT:
In a bipolar multiplier for multiplying a first input signal and a second input signal, the bipolar multiplier comprises a quadritail cell including two transistor pairs driven by a common tail current. A conversion circuit is connected to an input side of the quadritail cell for carrying out inverse hyperbolic tangent conversion. The conversion circuit comprises first and second differential amplifiers which are supplied with the first and the second input signals, respectively.

REFERENCES:
patent: 5107150 (1992-04-01), Kimura
patent: 5187682 (1993-02-01), Kimura
patent: 5438296 (1995-08-01), Kimura
patent: 5523717 (1996-06-01), Kimura
patent: 5552734 (1996-09-01), Kimura
patent: 5578965 (1996-11-01), Kimura
patent: 5581210 (1996-12-01), Kimura
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.
Katsuji Kimura, "A Unified Analysis of Four-Quadrant Analog Multipliers Consisting of Emitter and Source-Coupled Transistors Operable on Low Supply Voltage", IEICE Trans. Electron., vol. E-76-C, No. 5, May 1993, pp. 714-737.

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