System and method for clock independent pulse width modulation
AssigneeHewlett-Packard Development Company, L.P.
InventorsRobert D. Morrison, Jack L. Meador
Life of this patent
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Abstract
A method of clocking a video processing circuit is performed by stalling a reference clock signal. The reference clock signal is stalled based on a stall signal from a clock-independent pulse width modulator. The stalled reference clock signal is used to produce a video clock signal for use by an image data processing circuit.
Claims43
A video processing system for a laser printer, comprising:
- a video image formatter;
- a clock-independent pulse width modulator;
- and
- a clock gating circuit configured to provide a clock signal to said video image formatter based on a stall signal received from said clock-independent pulse width modulator.
A clock gating circuit for clocking video processing circuitry, comprising:
- an input for receiving a reference clock signal;
- an input for receiving a stall signal from a clock-independent pulse width modulator;
- and
- a gating circuit configured to alter said reference clock signal in accordance with said stall signal and output a resulting video clock signal for said video processing circuitry.
A method of clocking a video processing circuit, said method comprising stalling a reference clock signal based on a stall signal from a clock-independent pulse width modulator to produce a video clock signal for use by an image data processing circuit.
A method of printing comprising:
- clocking a video processing circuit by stalling a reference clock signal based on a stall signal from a clock-independent pulse width modulator to produce a video clock signal for use by an image data processing circuit;
- and
- processing image data with said image data processing circuit according to a timing of said video clock signal.
A system for printing comprising:
- image data processing means for processing image data;
- and
- means for stalling a reference clock signal based on a stall signal from a clock-independent pulse width modulator to produce a video clock signal for use by said image data processing means.
A video processing system for a laser printer comprising:
- a video image formatter comprising a video control block;
- and
- a clock-independent pulse width modulator configured to output a stall signal based on operation of said clock-independent pulse width modulator.
- wherein said video control block is configured to provide a clock signal for said video image formatter based on said stall signal received from said clock-independent pulse width modulator.
Dependencies are inferred from the claim text.