Current pump structure

Details Current pump structure Current pump structure

1990-04-05

1991-11-05

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

323272, 323312, 307577, G05F 308

Patent

active

050633430

ABSTRACT:
In a current pump, three separate current sources, each providing an identical current, are used. A first current pump is provided between an output load and a positive power supply terminal to provide a positive current to a load. To enable the current pump to provide a zero current to the load or withdraw a current from the load, second and third current pumps are provided in parallel between the load and a ground terminal. Associated switches couple these second and third current sources to the load. Thus, three states of the current pump are available which provide either a positive current, a negative current, or a zero current to a load.

REFERENCES:
patent: 4051428 (1977-09-01), Imai
patent: 4429270 (1984-01-01), Davies et al.
patent: 4727309 (1988-02-01), Vajdic et al.

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