Reference voltage generator

A reference voltage generator includes: a reference voltage source 1 that generates a direct-current voltage that is used as a reference; a low-pass filter 2 that is connected to an output node of the reference voltage source; a first voltage buffer circuit 10 with an input terminal to which the out...

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1. Verfasser:	KUME TOMOHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	CONTROLLING PHYSICS REGULATING SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
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creator	KUME TOMOHIRO
description	A reference voltage generator includes: a reference voltage source 1 that generates a direct-current voltage that is used as a reference; a low-pass filter 2 that is connected to an output node of the reference voltage source; a first voltage buffer circuit 10 with an input terminal to which the output node of the reference voltage source is connected and an output terminal to which an output node of the low-pass filter is connected, which has a voltage gain of one time; and a hysteresis comparator 11 with one input terminal to which the output node of the reference voltage source is connected and an other input terminal to which the output node of the low-pass filter is connected. At start-up, during a time period in which a voltage difference between an output of the reference voltage source and an output of the low-pass filter exceeds a predetermined value, an output impedance of the first voltage buffer circuit is controlled based on an output signal of the hysteresis comparator. At start-up, the low-pass filter that reduces noise is charged with a low impedance rapidly, and thus an output voltage can be stabilized rapidly.
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At start-up, during a time period in which a voltage difference between an output of the reference voltage source and an output of the low-pass filter exceeds a predetermined value, an output impedance of the first voltage buffer circuit is controlled based on an output signal of the hysteresis comparator. 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At start-up, during a time period in which a voltage difference between an output of the reference voltage source and an output of the low-pass filter exceeds a predetermined value, an output impedance of the first voltage buffer circuit is controlled based on an output signal of the hysteresis comparator. 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At start-up, during a time period in which a voltage difference between an output of the reference voltage source and an output of the low-pass filter exceeds a predetermined value, an output impedance of the first voltage buffer circuit is controlled based on an output signal of the hysteresis comparator. At start-up, the low-pass filter that reduces noise is charged with a low impedance rapidly, and thus an output voltage can be stabilized rapidly.</abstract><oa>free_for_read</oa></addata></record>
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subjects	CONTROLLING PHYSICS REGULATING SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
title	Reference voltage generator
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