Signal processing apparatus, droplet ejection apparatus and...

Details Signal processing apparatus, droplet ejection apparatus and... Signal processing apparatus, droplet ejection apparatus and...

2009-03-26

2011-12-13

Le, Uyen Chau N (Department: 2874)

Incremental printing of symbolic information

Ink jet

Controller

C347S012000, C347S019000, C347S050000

Reexamination Certificate

active

08075076

ABSTRACT:
A signal processing apparatus has a first circuit board having a digital/analog converter, a second circuit board having an operational amplifier, a connector connecting the first circuit board and the second circuit board, a transmitter on the first circuit board, and a controller on the second circuit board. The digital/analog converter converts, to an analog signal, a digital signal as a reference of a voltage to be applied to a capacitive load and outputs the analog signal. The operational amplifier is connected to the capacitive load at an output terminal thereof via a switching element, and amplifies the voltage of the analog signal to output. The transmitter transmits a predetermined signal to the second circuit board via the connector. The controller prevents the voltage of the analog signal from being applied to the capacitive load when the predetermined signal is not received in the second circuit board.

REFERENCES:
patent: 4367476 (1983-01-01), Sagae
patent: 2000-094670 (2000-04-01), None

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