Charge pump with low power, high voltage protection circuitry

Details Charge pump with low power, high voltage protection circuitry Charge pump with low power, high voltage protection circuitry

2009-12-31

2011-11-08

Hiltunen, Thomas J (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C363S060000

Reexamination Certificate

active

08054125

ABSTRACT:
A charge pump circuitry for generating a charging voltage for programming a one time programmable (OTP) memory includes a charge pump sub-circuit for generating the charging voltage in a second voltage range when the charging voltage exceeds a threshold level. A precharge circuit generates the charging voltage in a first voltage range when the charging voltage is below the threshold level. A voltage measurement circuit determines the charging voltage. A first control circuit enables the precharge circuit and disables the charge pump sub-circuit in a first mode of operation responsive to the charging voltage being determined to be below the threshold level and disables the precharge circuit and enables the charge pump sub-circuit in a second mode of operation responsive to the charging voltage being determined to exceed the threshold level. A second control circuit provides an indication that the charging voltage has reached a charging level for programming the OTP memory responsive to the determined charging voltage.

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patent: 2010/0188880 (2010-07-01), Stakely
patent: 2011/0002164 (2011-01-01), Soma

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