Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1993-11-01
1995-02-28
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
36518909, 365226, 327530, 327306, G05F 316
Patent
active
053940270
ABSTRACT:
Charge pump and related circuitry (30) for operation at low power supply voltages includes voltage elevating circuitry (51), clock voltage level shifting circuitry (53), clock separator (55) and charge pump (57). The voltage elevating circuitry (51) receives a power supply voltage VDD and provides an elevated intermediate output voltage V1. The clock voltage level shifting circuitry (53) receives an input clock signal and the voltage V1. The clock voltage level shifting circuitry (53) shifts the maximum voltage level of the CLOCK1 signal from VDD to V1 and provides this signal, labeled SHIFTED CLOCK, as an output. Clock separator (55) receives the SHIFTED CLOCK signal and provides non-overlapping, elevated clocks CLOCKA, CLOCKB, CLOCKC, and CLOCKD, each having a maximum voltage level of V1. Charge pump 57 utilizes the elevated clock signals to provide a high voltage output VOUT.
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Duane Oto et al., "High-Voltage Regulation and Process Considerations for High-Density 5V-Only E2PROM's", IEEE Journal of Solid-State Circuits, vol. SC-18, No. 5, Oct. 1983, pp. 532-538.
Callahan Timothy P.
Hill Susan C.
Kim Jung H.
Motorola Inc.
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