CMOS bandgap voltage and current references

Details CMOS bandgap voltage and current references CMOS bandgap voltage and current references

1992-10-19

1994-04-26

Sterrett, J. L.

Electricity: power supply or regulation systems

Self-regulating

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

323315, G05F 316

Patent

active

053070070

ABSTRACT:
Precise CMOS bandgap voltage and current references which uses the difference of MOS source-gate voltages to perform efficient curvature compensation are proposed and analyzed. Applying the developed design strategies, bandgap voltage references (BVR) with a temperature drift below 10 ppm/.degree.C. and a power supply drift below 10 ppm/V can be realized. For bandgap current references, both drifts can be under 15 ppm. An experimental BVR chip shows an average drift of 5.5 ppm/.degree.C. from -60.degree. C. to 150.degree. C. and 25 .mu.V/V for supply voltages between 5 V and 15 V at 25.degree. C. Due to novel curvature compensation, the circuit structure of the proposed references is simple and both chip area and power consumption are small.

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