Incremental printing of symbolic information – Ink jet – Controller
Reexamination Certificate
2011-08-16
2011-08-16
Luu, Matthew (Department: 2861)
Incremental printing of symbolic information
Ink jet
Controller
C347S010000, C347S068000
Reexamination Certificate
active
07997671
ABSTRACT:
There is provided a capacitive load driving circuit which applies a driving signal to a capacitive load. The driving circuit includes: an operational amplifier outputting a difference signal between signals from an inverting input terminal and a non-inverting input terminal, and setting a loop gain; a pulse width modulator pulse-width-modulating the difference signal outputted by the operational amplifier, and outputting resultant digital signal; a digital voltage amplifier amplifying a voltage of the digital signal; a first filter smoothing a digital signal from the digital voltage amplifier, and supplying a smoothed signal to the capacitive load as the driving signal; an impedance converting circuit converting an impedance of an output signal of the first filter; and a first feedback circuit feeding-back the driving signal, which is outputted from the first filter, to the inverting input terminal of the operational amplifier via the impedance converting circuit.
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Fildes & Outland, P.C.
Fuji 'Xerox Co., Ltd.
Lebron Jannelle M
Luu Matthew
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