Voltage-to-current converter

Details Voltage-to-current converter Voltage-to-current converter

1995-07-31

1997-04-08

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

363 73, G05F 316, G05F 320, H02M 700

Patent

active

056191251

ABSTRACT:
Briefly in accordance with one aspect of the present invention, a voltage-to-current converter for converting an input voltage signal to an output current signal, exhibits a substantially linear voltage/current characteristics over the entire available voltage signal range. The voltage-to-current converter comprises a first voltage-to-current converter having a substantially linear voltage/current characteristic for input voltage signals smaller than a first reference voltage signal level and up to substantially the minimum voltage signal level generated by a DC power supply employed to drive the voltage-to-current converter. A second voltage-to-current converter has a substantially linear voltage/current characteristic for voltage input signals larger than a second reference voltage signal level and up to substantially the maximum voltage signal level generated by the DC power supply. A control circuit is coupled to activate the first voltage-to-current converter, when the input voltage signal is smaller than the first reference voltage signal, and to activate the second voltage-to-current converter when the input voltage signal is larger than the second reference voltage signal level.

REFERENCES:
patent: 4937516 (1990-06-01), Sempel
patent: 4942369 (1990-07-01), Nakagawara et al.
patent: 4961046 (1990-10-01), De Jager
patent: 5146188 (1992-09-01), Suwada et al.
patent: 5241227 (1993-08-01), Jung et al.

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