Voltage reference circuit using PTAT voltage

Details Voltage reference circuit using PTAT voltage Voltage reference circuit using PTAT voltage

2006-10-10

2006-10-10

Nguyen, Matthew V. (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

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

C323S313000, C327S539000

Reexamination Certificate

active

07119527

ABSTRACT:
A voltage reference generator is disclosed that includes a current generator for generating a current that is proportional to absolute temperature (PTAT), the current generator having an internal resistance. This provides a PTAT current that is proportional to the resistance and wherein the temperature coefficient of the PTAT current is defined by the resistance. An output node is driven by the current generator with the PTAT current. A stack of serial connected MOS devices is connected between the output voltage and a ground reference voltage. The stack of transistors has a transimpedance associated therewith which has a temperature coefficient that is opposite in polarity to the temperature coefficient of the internal resistance and of a magnitude to provide a voltage on the output node that is substantially stable over temperature.

REFERENCES:
patent: 5942888 (1999-08-01), Tan
patent: 6097180 (2000-08-01), Tsukude et al.
patent: 6111396 (2000-08-01), Lin et al.
patent: 6791307 (2004-09-01), Harrison

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