Stable current source

Details Stable current source Stable current source

1986-01-29

1987-07-14

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

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

323907, G05F 304

Patent

active

046805354

ABSTRACT:
A highly stable current source which is protected against high voltage overloads, comprising a loop circuit in which the current of known magnitude Iref passes through a scaler resistor to develop a voltage drop thereacross, which is connected with a floating potential in a loop circuit. A differential amplifier is coupled to differentially measure the voltages across the scaler resistor and the floating potential, and provides an output indicative thereof, which determines Iref. In this arrangement, the voltage drop across the scaler resistor equals the voltage drop across the floating potential, and the current Iref through the scaler resistor remains constant at a known magnitude. Embodiments of both positive and negative current generating circuits are disclosed.

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