Circuits for linear conversion between voltages and currents

Details Circuits for linear conversion between voltages and currents Circuits for linear conversion between voltages and currents

1991-08-19

1992-06-30

Mottola, Steven

Amplifiers

Signal feedback

Amplifier in signal feedback path

330277, H03F 316

Patent

active

051266857

ABSTRACT:
A linear voltage-to-current converter (LVCC) circuit includes two transistors, one P-channel and one N-channel. The input voltage is applied to the gates of both transistors. The drains of the two transistors are connected. The source of the p-type transistor is connected to a first voltage rail, and the source of the N-channel is connected to a second voltage rail of lower voltage. The output is the difference between the current through the P-channel transistor and the N-channel transistor. A linear current-to-voltage converter (LCVC) circuit is similar to the LVCC circuit, except that the gates of the transistors are tied to the drains of the transistors. The input current is supplied to the drains, and the output voltage is the voltage of the drains.

REFERENCES:
patent: 4492931 (1985-01-01), Deweck
patent: 4562406 (1985-12-01), Baker
Bolt, Klaas, et al., "A Class of Araloy CMOS Circuits Based on the Square Law Characteristics of an MOS Transistor in Saturation", IEEE J. S. S. Ckts, vol. SC-22, No. 3, Jun. 1987, pp. 357-365.
Seevinck, Evert, et al., "A Versitile CMOS Linear Transconductor/Square-Law Function Circuit", IEEE J. S. S. Ckts, vol. SC-22, No. 3, Jun. 1987, pp. 366-377.

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