Reference current generator adjustable by a variable current...

Details Reference current generator adjustable by a variable current... Reference current generator adjustable by a variable current...

2007-09-11

2010-06-15

Vu, Bao Q (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

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

C323S313000, C323S315000, C323S316000

Reexamination Certificate

active

07737675

ABSTRACT:
A reference current generator for outputting a current proportional to absolute temperature includes a fixed current source transistor, a variable current source transistor and an output transistor which are connected to a drain voltage line. The fixed current source transistor is connected to a source voltage via a series of resistor and first diode. The variable current source transistor is connected to the source voltage via a second diode. A first node between the variable current source transistor and the resistor is connected with a noninverting input of an operational amplifier, and a second node between the variable current source transistor and the second diode is connected with an inverting input of the operational amplifier. The operational amplifier has its output connected to the gate electrode of both the fixed current source transistor and the output transistor, which outputs a PTAT current depending upon the gate voltage.

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Mishimagi; Japanese Office Action; 2006-250777; Oct. 7, 2008.
Japanese Office Action ‘Notification of Reason for Refusal’ dated Sep. 28, 2009; Patent Application No. 2006-250777; with extract English translation.

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