DC level generator

Details DC level generator DC level generator

1992-06-12

1994-10-25

Callahan, Timothy P.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307359, 307494, H03K 1716, H03K 524

Patent

active

053592379

ABSTRACT:
A method and apparatus for sequentially refreshing each of an array of sample and hold output circuits in a DC level generator. Each sample and hold circuit makes a selected DC voltage available. For each of the sample and hold output circuits in turn, the voltage which it is desired to store in that circuit is generated. The generated voltage is compared with the voltage stored by that one sample and hold output circuit to produce a voltage difference signal and an error correction storage and hold circuit is charged to a voltage proportional to the voltage difference signal. Charge proportional to the voltage stored in the error correction storage and hold circuit is then transferred to the selected one sample and hold output circuit to reduce the difference between the compared voltages.

REFERENCES:
patent: 4334195 (1982-06-01), Luce
patent: 4698523 (1987-10-01), Gershon et al.
patent: 4804863 (1989-02-01), Welland et al.
patent: 4851719 (1989-07-01), Hitomi

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