Miscellaneous active electrical nonlinear devices – circuits – and – Gating – Signal transmission integrity or spurious noise override
Patent
1996-11-12
1999-02-23
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Gating
Signal transmission integrity or spurious noise override
327589, 318293, H03K 1716
Patent
active
058748474
ABSTRACT:
A charge pump circuit for charging/pumping charge into/out of a charge pumping capacitor. Charge is pumped from the capacitor to turn on one of a pair of MOSFET transistors formed in an integrated circuit for driving a load. The MOSFET transistors are connected at a node in series with one another. The charging capacitor has one end connected at the node and the other connected through a diode to one side of a power supply which is also applied across both transistors. An input signal turns the MOSFETs on and off in a complementary fashion. Each MOSFET has a gate which is discharged to ground when the MOSFET is turned off. A zener diode prevents the capacitor from pumping excess charge to the gate of the MOSFET to which it is connected. Another zener diode prevents damage resulting from excessive voltage external to the integrated circuit.
REFERENCES:
patent: 4443714 (1984-04-01), Nakano et al.
patent: 4636657 (1987-01-01), Reddy
patent: 4705997 (1987-11-01), Juzswik
patent: 5268600 (1993-12-01), Yeu
patent: 5600216 (1997-02-01), Karwath et al.
Kim Yong-ho
Min Byoung-Own
Callahan Timothy P.
Kim Jung Ho
Samsung Electronics Co,. Ltd.
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