Pen voltage regulator for inkjet printers

Details Pen voltage regulator for inkjet printers Pen voltage regulator for inkjet printers

2006-03-20

2008-08-12

Huffman, Julian D (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

C347S010000

Reexamination Certificate

active

07410231

ABSTRACT:
A pen voltage regulator is provided for supplying a regulated pen voltage to one or more printheads of an inkjet printer. The pen voltage regulator includes: a regulator switch arranged between an input terminal and an output terminal; a linear lifting circuit connected to the regulator switch; a soft start circuit arranged between the regulator switch and the output terminal; an output filter arranged between the soft start circuit and the output terminal; and a pulse width modulation (PWM) controller connected to the linear filtering circuit. The PWM controller is arranged to provide a pulse width modulated control signal to the linear filtering circuit. The linear filtering circuit is configured to transmit a smoothed control signal to the regulator switch and to ensure that the regulator switch is operable in a linear region. The soft start circuit is configured to provide a soft-start mode of operation so as to prevent the generation of large inrush currents and to provide overload protection.

REFERENCES:
patent: 5278489 (1994-01-01), Bowers
patent: 6439678 (2002-08-01), Norton
patent: 6481814 (2002-11-01), DeMoor et al.
patent: 2005/0041049 (2005-02-01), Masuda
patent: 2005/0248894 (2005-11-01), Bliley et al.

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