Information device
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United States of America Patent
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Dec 8, 2015
Grant Date -
Aug 7, 2014
app pub date -
Apr 7, 2014
filing date -
Nov 13, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A compact information device in which a shortened unlatch time is enabled so such device can transition from a power cutoff mode to a power supply mode to resume supplying power to internal circuits as a result of a latch circuit unlatching a control signal. Embodiments of such a device, which may be a printer, includes a CPU, a power switch, a capacitor, a switch circuit, an unlatch signal generating unit, and a switch control signal generator, which may include a latch circuit, and a potential difference detection circuit. The latch circuit and potential difference detection circuit operate with voltage Vin2. The CPU outputs a start latch signal VLT when the operating mode changes from the power supply mode to the power cutoff mode. When the power switch is turned off, the potential difference detection circuit outputs an unlatch signal VRST. When the unlatch signal VRST is input, the latch circuit unlatches the control signal.
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