Voltage to current conversion circuit for converting voltage to

Details Voltage to current conversion circuit for converting voltage to Voltage to current conversion circuit for converting voltage to

1997-07-01

1999-02-02

Wong, Peter S.

325316, G05F 316

Patent

active

058670351

ABSTRACT:
This invention provides an absolute value voltage to current conversion circuit which realizes multiple outputs of the current obtained by the conversion of a voltage. For an input voltage of positive polarity, an inverting voltage to current conversion circuit is formed by means of an operational amplifier and a multiple output current mirror circuit. In that case, currents which are 1
of a converted current are obtained by setting the ratio of the input current to the output current of the current mirror circuit to n:1. For an input voltage of negative polarity, a noninverting voltage to current conversion circuit is formed by means of the operational amplifier and a plurality, n, of bipolar transistors. The converted current is distributed among n bipolar transistors to obtain an output current per transistor which is 1
of the converted current. As a result, an absolute value voltage to current conversion circuit with multiple outputs can be realized.

REFERENCES:
patent: 4467289 (1984-08-01), Okada
patent: 5087891 (1992-02-01), Cytera
patent: 5157322 (1992-10-01), Llewellyn

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