Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Reexamination Certificate
2008-12-23
2010-10-26
Donovan, Lincoln (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
C327S142000
Reexamination Certificate
active
07821307
ABSTRACT:
In an apparatus for monitoring a supply voltage, a current mirror coupled to the supply voltage provides a pair of matching currents. A resistor divider that includes a first resistor coupled in series with a second resistor to from a first node is disposed between the supply voltage and a voltage reference. A pair of transistors that have their bases coupled to the first node are coupled to receive a corresponding one of the pair of matching currents. A collector of a first transistor of the pair of transistors provides an output voltage in response to the supply voltage. A third resistor is disposed between an emitter of a second transistor of the pair of transistors and the voltage reference. A base and a collector of a third transistor are coupled to the first node and an emitter is coupled to the voltage reference.
REFERENCES:
patent: 7190212 (2007-03-01), Shor et al.
patent: 7411443 (2008-08-01), Ivanov et al.
Brady III Wade J.
Donovan Lincoln
Kempler William B.
Rojas Daniel
Telecky , Jr. Frederick J.
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