Analog multiplier operable on a low supply voltage

Details Analog multiplier operable on a low supply voltage Analog multiplier operable on a low supply voltage

1995-06-01

1996-11-19

Nelms, David C.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

Combining of plural signals

327359, 327560, 327563, G06F 744, G06G 712

Patent

active

055766536

ABSTRACT:
A multiplier includes first through fourth transistors (Q.sub.1, Q.sub.2, Q.sub.3, Q.sub.4) and a current source (I.sub.0). The first transistor has a base electrode connected to a first input terminal (T1) and a collector electrode connected to a first output terminal (T5). The second transistor has a base electrode connected to a second input terminal (T2) and a collector electrode connected to a second output terminal (T6). The third transistor has a base electrode connected to a third input terminal (T3) and a collector electrode connected to the second output terminal. The fourth transistor has a base electrode connected to a fourth input terminal (T4) and a collector electrode connected to the first output terminal. Supplied with voltages of V.sub.1 and V.sub.2, a voltage supplying circuit produces and supplies voltages of (1/2)V.sub.1, (-1/2)V.sub.1, {(1/2)V.sub.1 -V.sub.2 }, and {(-1/2)V.sub.1 -V.sub.2 } to the input terminals. The output terminals are supplied with first and second output currents.

REFERENCES:
patent: 4990803 (1991-02-01), Gilbert
patent: 5057716 (1991-10-01), Kiing
patent: 5157350 (1992-10-01), Rubens
patent: 5311086 (1994-05-01), Yamaji et al.
patent: 5319267 (1994-06-01), Kimura
patent: 5329173 (1994-07-01), Murakami et al.
patent: 5331289 (1994-07-01), Price
Z. Wang, "A CMOS Four-Quadrant Analog Multiplier with Single-Ended Voltage Output and Improved . . . Performance", IEEE Journal of Solid-Dtate Circuits, vol. 26, No. 9, Sep. 1991, pp. 1293-1301.
K. Kimura, "A Unified Analysis of Four-Quadrant Analog Multipliers Consisting of Emitter and . . . on Low Supply Voltage", IEICE Transactions on Electronics, vol. E76-C, No. 5, May 193, pp. 714-737 Patent Abstracts of Japan, vol. 15, No. 169 (P-1196), Apr. 26, 1991.

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