Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2008-02-29
2009-10-13
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
C363S059000, C363S060000
Reexamination Certificate
active
07602233
ABSTRACT:
A multi-stage voltage multiplication circuit and methodology are provided which use a multi-stage charge pump boosting circuit (210) and two-stage pass gate circuit (220) having complementary power switches (M6, M9, M7, M10) to efficiently develop an output voltage (VOUT) that is higher than the input supply voltage (VDD). By using a two-stage complementary switch to connect boosted clock signals (P1, P2) from a charge pump (210) to the multiplier output (VOUT), return current from the storage capacitor (COUT) to the pumping capacitor (C1, C2) is blocked, thereby increasing power transfer efficiency, even at high clock frequencies. In addition, a boosted auxiliary voltage is generated by an additional boosting stage (230) and applied to the PMOS wells of the pass gate circuit (220), thereby preventing latch-up and backflow.
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P. Favrat et al., A High Efficiency CMOS Voltage Doubler, IEEE Journal of Solid-State Circuits, vol. 33, No. 3, Mar. 1988.
Bertoli Roberto Angelo
De Goes Marcos Augusto
Pietri Stefano
Cannatti Michael Rocco
Donovan Lincoln
Freescale Semiconductor Inc.
Hamilton & Terrile LLP
Rojas Daniel
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