Voltage/current source

Details Voltage/current source Voltage/current source

1986-03-18

1986-12-02

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

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

323285, 324 76R, 364162, G05F 110

Patent

active

046267697

ABSTRACT:
A voltage/current source includes a loop controller (24) that digitally determines the control signals that must be applied to a driver amplifier (34) to achieve the desired load voltage or current. The analog outputs of current- and voltage-sensing amplifiers (38 and 68) are converted by analog-to-digital converters (52 and 74) to digital feedback signals that the loop controller (24) uses in determining what control signals to generate. The loop controller (24) keeps the driver-amplifier output voltage equal to the load voltage until switch contacts (30) connect the source to the load so that connection-caused transients are minimized. The loop controller (24) includes read-write memory (25) in which it stores program instructions and operational parameters, so the source can readily change its feedback characteristics. Furthermore, output-voltage limits are readily imposed by software limits on the driver-amplifier input voltage, so no elaborate clamping circuitry at the output port of the source is necessary to prevent output-voltage overshoot.

REFERENCES:
patent: 4234832 (1980-11-01), Dreinhoefer et al.
patent: 4250543 (1981-02-01), Smith et al.
patent: 4365302 (1982-12-01), Elms
patent: 4396986 (1983-08-01), Salesky
patent: 4438498 (1984-03-01), Sekel et al.
patent: 4466054 (1984-08-01), Shigemasa et al.

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