Ink-on-demand type ink jet head driving circuit

Details Ink-on-demand type ink jet head driving circuit Ink-on-demand type ink jet head driving circuit

1978-10-18

1980-01-15

Miller, Jr., George H.

Recorders

Markers and/or driving means therefor

With ink supply to marker

346 75, G01D 1518

Patent

active

041841689

ABSTRACT:
A circuit for driving an ink-on-demand type ink jet head comprising a comparator for comparing the video signal with a reference signal and delivering a high-level output when the level of the video signal is higher than or equal to said reference voltage or a low-level output when the level of the video signal is lower than the reference voltage; a pulse synchronization circuit for receiving the output of the comparator and a printing sync pulse and delivering an output pulse in synchronism with the printing sync pulse when the pulse synchronization circuit has received said high-level or low-level output from the comparator; and a sample-hold circuit for holding a peak value of the video signal, the output of the sample-hold circuit being delivered to a high-voltage energization circuit for driving an ink jet head, the output of the pulse synchronization circuit being applied to the sample-hold circuit so as to reset the peak value held thereby.

REFERENCES:
patent: 3828357 (1974-08-01), Koeblitz
patent: 4072958 (1978-02-01), Hayami et al.

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