Charge pump circuit

Details Charge pump circuit Charge pump circuit

1995-06-01

1997-06-10

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With bootstrap circuit

327536, 327537, G05F 110

Patent

active

056380232

ABSTRACT:
An improved charge pump circuit prevents excessive current leakage. A first MOS transistor has a drain terminal to receive an external voltage and a gate terminal which receives a word line voltage. The first MOS transistor drops the word line voltage by a threshold voltage and transfers the dropped voltage to a source terminal thereof. A capacitor generates a desired voltage for each rising edge of clock pulses applied thereto, and a second MOS transistor has a gate terminal receiving the word line voltage and a drain terminal receiving the voltage from the capacitor. The second MOS transistor transfers the voltage from the capacitor through a source terminal thereof with substantially no voltage drop. A third MOS transistor has a gate terminal connected to the source terminal of the first MOS transistor and a drain terminal connected in common to the source terminals of the first and second MOS transistors. The third MOS transistor adds an output voltage from the source terminal of the second MOS transistor to an output voltage from the source terminal of the first MOS transistor and transfers the added voltage through a source terminal thereof to the word line and the gate terminal of the first MOS transistor.

REFERENCES:
patent: 4223238 (1980-09-01), Parkinson et al.
patent: 4570088 (1986-02-01), Nozaki et al.
patent: 4633106 (1986-12-01), Backes et al.
patent: 4673829 (1987-06-01), Gupta
patent: 4876462 (1989-10-01), Kobatake et al.
patent: 4905314 (1990-02-01), Kato et al.
patent: 4920280 (1990-04-01), Cho et al.
patent: 5041739 (1991-08-01), Goto
patent: 5212456 (1993-05-01), Kovalcik et al.
patent: 5239455 (1993-08-01), Fobbester et al.
patent: 5258662 (1993-11-01), Skovmand
patent: 5315188 (1994-05-01), Lee
patent: 5343088 (1994-08-01), Jeon

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