Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2008-01-22
2008-01-22
Patel, Rajnikant B. (Department: 2838)
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
C323S316000, C327S540000
Reexamination Certificate
active
07321225
ABSTRACT:
A voltage reference generator has been discovered that generates a stable reference voltage that is less than the bandgap voltage of silicon for power supply voltages less than 2V, yet provides sufficient voltage headroom to operate a cascaded current mirror. In one embodiment, the voltage reference generator has a power supply rejection ratio of at least 60 dB and has improved noise performance as compared to traditional bandgap circuits. These advantages are achieved by leveraging the low-beta effect of a CMOS bipolar transistor to generate a current proportional to an absolute temperature.
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Del Signore Bruce P.
Garlapati Akhil K.
Pietruszynski David
Patel Rajnikant B.
Silicon Laboratories Inc.
Zagorin O'Brien Graham LLP
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