Digital output control circuit

Details Digital output control circuit Digital output control circuit

1977-12-29

1979-10-23

Ruggiero, Joseph F.

Boots, shoes, and leggings

364119, 364900, G06F 1546

Patent

active

041722809

ABSTRACT:
There is shown a digital output circuit wherein digital data from a computer based controller is applied as input signals to a set of holding latches which are, in turn, enabled by control circuitry such as by response to address signals. The digital data stored in the several holding latches are applied as input signals to a corresponding number of relay driver circuits. The relay driver circuits are, in one aspect of the invention, coupled to selectively operate output control relays in accordance with the data signals applied to the driver circuits therefor. In another form, the driver circuits are connected directly to an output circuit without the intervention of relays. Selective control is provided for establishing the relay output signal in a latched or holding mode or in a controlled time momentary closure mode. In the momentary closure mode the time is established by a data controlled counter. Additionally, a protective circuit is provided which prevents the output circuit from issuing a spurious output signal during a power-up or power-down interval.

REFERENCES:
patent: 3744028 (1973-07-01), Krik
patent: 3829842 (1974-08-01), Langdon et al.
patent: 3969703 (1976-07-01), Kwiatkowski et al.

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