Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2007-06-19
2010-02-02
Han, Jessica (Department: 2838)
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
C323S280000, C323S281000
Reexamination Certificate
active
07656145
ABSTRACT:
A voltage generator is used for generating a voltage reference with high power supply rejection. One embodiment of the circuit includes a voltage regulator and a bandgap voltage circuit and an amplifier. The voltage regulator including an input node is coupled to an external power supply for generating a regulated voltage source. A bandgap voltage circuit includes a first and a second resistor and a first and a second transistor to generate a voltage difference between the base-to-emitter voltages of the first and the second transistors. The second resistor is coupled to the first resistor and the first transistor for generating the first predetermined voltage in response to the voltage difference. An amplifier circuit is coupled to the first transistor of the bandgap voltage circuit for receiving a first amplifying signal and generating an amplified signal so as to regulate the regulated voltage source.
REFERENCES:
patent: 6867572 (2005-03-01), Lin
patent: 7012416 (2006-03-01), Marinca
patent: 7233196 (2007-06-01), Farooqui
patent: 7420359 (2008-09-01), Anderson et al.
patent: 2005/0110477 (2005-05-01), Mauthe
Li Guoxing
Tang Tom
Xiao Sean
Han Jessica
O2Micro International Limited
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