Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2011-04-19
2011-04-19
Donovan, Lincoln (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S114000, C327S535000, C363S060000
Reexamination Certificate
active
07928796
ABSTRACT:
A constant voltage boost power supply according to an aspect of the invention includes a voltage-controlled variable frequency oscillator that produces and supplies a clock signal and changes an oscillating frequency of the supplied clock signal according to an input control voltage; a charge pump into which the clock signal is fed, the charge pump performing a pumping operation in synchronization with the clock signal to boost an input voltage and supply an output voltage in which the input voltage is boosted; a voltage dividing circuit that divides the output voltage of the charge pump to supply a monitor voltage; and a differential amplifier into which the monitor voltage and a reference voltage are fed, the differential amplifier amplifying a potential difference between the monitor voltage and the reference voltage to supply the control voltage.
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Tomohiro Matsukawa, et al., “High-Efficiency Charge Pump Circuits”, The 17thWorkshop on Circuits and Systems in Karuizawa, Apr. 26, 27, 2004, 14 Pages (with English Translation).
Donovan Lincoln
Englund Terry L
Kabushiki Kaisha Toshiba
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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