Temperature compensated FET constant current source

Details Temperature compensated FET constant current source Temperature compensated FET constant current source

2006-10-17

2006-10-17

Zweizig, Jeffrey (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S103000, C327S513000

Reexamination Certificate

active

07123081

ABSTRACT:
A constant current source comprises a FET, a bandgap reference voltage source coupled to its gate terminal and a resistor coupled to its source terminal. The width and length of the FET are configured so that the temperature coefficient (TEMPCO) of Vgsof the transistor offsets the TEMPCO of the resistor.

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D. A. Badillo, “CMOS Current Reference . . . ,”IEEE Symp. on Circuits and Systems-III,vol. 3, pp. 197-200 (May 2002).
R. Dehghani et al., “A New Low Voltage Precision CMOS Current Reference . . . ,”IEEE Symp. on Circuits and Systems-II,vol. 50, No. 12, pp. 928-932 (Dec. 2003).

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