Reference current circuit for adjusting its output current...

Details Reference current circuit for adjusting its output current... Reference current circuit for adjusting its output current...

2008-04-11

2009-12-15

Riley, Shawn (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

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

C323S316000

Reexamination Certificate

active

07633281

ABSTRACT:
A reference current circuit includes a differential amplifier amplifying a difference in potential between a reference voltage and a first node and outputting the amplified potential difference to a second node, and adjusting transistors connected between a supply voltage and the first node. The reference current circuit further includes switches provided correspondingly to the adjusting transistors to apply a voltage of the second node to control electrodes of the adjusting transistors in response to control signals that are respectively input to the switches. The reference current circuit further includes a resistance connected between the first node and a common potential, and an output transistor having its conduction state responsive to the voltage of the second node for controlling a current supplied from the supply voltage to a load.

REFERENCES:
patent: 6172495 (2001-01-01), Washburn
patent: 2007/0108957 (2007-05-01), Noda
patent: 2000-75947 (2000-03-01), None

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