Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1993-11-24
1995-07-25
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327390, 327346, 307110, 363 60, H02M 318
Patent
active
054365872
ABSTRACT:
A charge pump circuit comprises a plurality of voltage doubler circuits connected together such that a first voltage output generated by a first portion of a kth one of the voltage doubler circuits is substantially equal to Vdd*2.sup.k and Vdd*2.sup.k-1) on odd and even phases, respectively, of a first clock signal, and a second voltage output generated by a second portion of the kth one of the voltage doubler circuits is substantially equal to Vdd*2.sup.k-1) and Vdd*2.sup.k on the odd and even phases, respectively, of the first clock signal. Each of the voltage doubler circuits is constructed such that when its first portion is providing a voltage of Vdd*2.sup.k and a current to a next stage, its second portion is recharging a capacitor in that portion to Vdd*2.sup.k-1), and when its second portion is providing a voltage of Vdd*2.sup.2 and a current to the next stage, its first portion is recharging a capacitor in that portion to Vdd*2.sup.k-1). An output circuit is connected to a last one of the voltage doubler circuits to provide other circuitry with a substantially constant output voltage Vpp and output current Ipp, by providing such voltage and current from a first voltage output of the last voltage doubler circuit on odd phases of the first clock signal, and from a second voltage output of the last voltage doubler circuit on even phases of the first clock signal.
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Dickson, J. F., "On-Chip High-Voltage Generation in MNOS Integrated Circuits Using an Improved Voltage Multiplier Technique," IEEE Journal of Solid-State Circuits, vol. SC-11, No. 3, pp. 374-378 (1976).
Callahan Timothy P.
Englund Terry L.
SunDisk Corporation
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