Special effect apparatus with power control

Details Special effect apparatus with power control Special effect apparatus with power control

1990-12-03

1992-07-21

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358182, H04N 05262

Patent

active

051327988

ABSTRACT:
A special effect device comprising a first signal source, a second signal source, subtracting circuit, coefficient multiplying circuit, adding circuit, switch circuit and control circuit. The subtracting circuit is arranged to produce a difference signal between the signals of the first signal source and the second signal source. The coefficient multiplying circuit multiplies the difference from the subtracting circuit by a predetermined coefficient and the adding circuit adds the signals output from the first and second signal sources to the signal output from the multiplying circuit. The switch circuit selectively outputs the output of the first signal source or an output of the adding circuit. The control circuit is arranged to stop the supply of power to at least the subtracting circuit when the switch circuit is selectively outputting the output of the first signal source.

REFERENCES:
patent: 4163249 (1974-07-01), Michael et al.
patent: 4947240 (1990-08-01), Hausdorfer
patent: 4949180 (1990-08-01), Miles
patent: 4951144 (1990-08-01), Des Jardins
patent: 4970595 (1990-11-01), Bloomfield
patent: 4984083 (1991-01-01), Okamoto et al.

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