Method and circuit for reducing transient currents

Details Method and circuit for reducing transient currents Method and circuit for reducing transient currents

1995-02-24

1999-10-12

Gaffin, Jeffrey

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307130, 307131, 327 91, H01H 4700

Patent

active

059659580

ABSTRACT:
A circuit for reducing a potential difference between terminals of an open switch. A current source is arranged to supply charges to a capacitor through first and second switches. Charge is being supplied to the capacitor only when the first switch is closed. The current source and the capacitor are maintained at first and second reference potentials, respectively. The circuit further includes a voltage follower which has its output connected to the second switch and one of its inputs connected to the capacitor and the other input connected to its output. The output of the voltage follower is at the same potential as one terminal of the first switch so that when the second switch is closed, the two terminals of the first switch are at the same potentials as each other.

REFERENCES:
patent: 3737754 (1973-06-01), Katz
patent: 4227186 (1980-10-01), Aschwanden
patent: 4420784 (1983-12-01), Chen et al.
patent: 4734879 (1988-03-01), Lin et al.
patent: 5142435 (1992-08-01), Baumgartner et al.
patent: 5214313 (1993-05-01), Windes
patent: 5449960 (1995-09-01), Ohi et al.
patent: 5467035 (1995-11-01), Ohi et al.
"Sedra and Smith", Microelectronic Circuits, p. 545, 1991.

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