Laser printer interface circuit

Details Laser printer interface circuit Laser printer interface circuit

1986-03-07

1988-07-26

Goldberg, E. A.

Recorders

Combined with external recorder operating means

Well logging

346 76L, 346108, 358296, 364900, 34082514, G01D 900, H04N 121, G06F 900, H04Q 900

Patent

active

047604069

ABSTRACT:
A printer interface circuit is provided in a host system so as to allow a printer having its own clock signal for its printing operation to be directly connected to the host system. In the present invention, data to be printed is first stored in a data latch as supplied in association with the clock signal of the host system, and then the data stored in the data latch is transferred to the printer in association with the printer. Thus, even if use is made of a laser printer, which has its own clock signal, it can be directly connected to a host system, such as a personal computer. In the preferred embodiment, the printer interface circuit modifies the frequency of the clock signal of the printer and the data is transferred to the printer at this modified frequency, so that the data may be expanded when printed.

REFERENCES:
patent: 3638197 (1972-01-01), Brennan, Jr. et al.
patent: 4561024 (1985-12-01), Tamura

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