Charge pump circuit and power supply circuit
1 Assignment
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Accused Products
Abstract
A charge pump circuit is provided for generating a voltage (1+1/n) times as high as a supply voltage. The charge pump circuit eliminates the need for diodes for preventing a current from flowing back from a high potential side of capacitors to prevent a reduction in the voltage due to a forward voltage, and reduces a reactive current and latch-up when the charge pump circuit is integrated into a single IC chip. The charge pump circuit includes a fourth switching element having a substrate gate connected to a drain for preventing a current from flowing back to an input terminal from a high potential side of fly back capacitors connected in series, and a second switching element having a substrate gate connected to a drain for preventing a current from flowing back from a high potential side of a catch-up capacitor to the fly back capacitors connected in series.
41 Citations
36 Claims
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1-28. -28. (canceled)
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29. A circuit comprising:
a single integrated circuit chip, said integrated circuit chip comprising;
a charge pump circuit, said charge pump circuit comprising;
a plurality of conductor pairs, each conductor pair for coupling to a respective one of plurality of first capacitors each to be charged with an input voltage, each conductor pair having a first low potential side conductor and a second high potential side conductor;
a plurality of first switching elements each for connecting the low potential side conductor of a corresponding one of said plurality of pairs of conductors to a positive power supply input terminal;
a plurality of second switching elements each for connecting the high potential side conductor of the corresponding one of said plurality of pairs of conductors to an output terminal;
at least one third switching element connected to a corresponding one of said plurality of conductor pairs in series;
a fourth switching element for connecting one end of a series circuit of each corresponding one of said plurality of conductor pairs and said at least one third switching element to said positive power supply input terminal;
a fifth switching element for connecting the other end of the series circuit of each corresponding one of said plurality of conductor pairs and said at least one third switching element to a negative power supply input terminal; and
a control circuit for controlling each of said first switching elements, each of said second switching elements, each of said at least one third switching element, said fourth switching element and said fifth switching element in response to a clock signal; and
a current regulator circuit connecting a load. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
Specification