Progressive start-up charge pump and method therefor

Details Progressive start-up charge pump and method therefor Progressive start-up charge pump and method therefor

1997-07-10

1998-08-25

Hecker, Stuart N.

Electric power conversion systems

Current conversion

With voltage multiplication means

327536, 323901, H02M 318, G05F 302

Patent

active

057989150

ABSTRACT:
A progressive start-up charge pump that eliminates the start-up problems of p-channel charge pump stages by starting the charge pump one stage at a time. The charge pump has a plurality of charge pump stages wherein each of the plurality of charge pump stages are coupled to a successive charge pump stage in a cascade mode. An enabling circuit is coupled to each of the plurality of charge pump stages for individually starting each of the plurality of charge pump stages one charge pump stage at a time starting with a last charge pump stage and successively turning on a directly previous charge pump stages until the first charge pump stage is started. This will ensure that the voltage output node is at a greater potential than the voltage input node for each of the plurality of charge pump stages during start-up.

REFERENCES:
patent: 4053821 (1977-10-01), Hose, Jr. et al.
patent: 4149232 (1979-04-01), Eaton, Jr.
patent: 5059815 (1991-10-01), Bill et al.
patent: 5394320 (1995-02-01), Blodgett
patent: 5436587 (1995-07-01), Cernea
patent: 5642073 (1997-06-01), Manning

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