Constant current generation circuit and microprocessor including the same

A constant current generation circuit of the invention includes: a temperature variable voltage generation unit that generates a first variation voltage whose voltage value fluctuates with temperature; a variation gradient adjustment unit that generates a second variation voltage based on a referenc...

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Bibliographic Details
Main Authors SAKO KAZUTOSHI, MATSUZAKI TOMOKAZU
Format Patent
LanguageChinese
English
Published 17.10.2012
Subjects
AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
BASIC ELECTRONIC CIRCUITRY
CONTROLLING
ELECTRICITY
PHYSICS
PULSE TECHNIQUE
REGULATING
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
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Summary:A constant current generation circuit of the invention includes: a temperature variable voltage generation unit that generates a first variation voltage whose voltage value fluctuates with temperature; a variation gradient adjustment unit that generates a second variation voltage based on a reference voltage smaller in the amount of variation with temperature than the first variation voltage and the first variation voltage; and a current generation unit that includes a current setting resistor whose resistance value fluctuates with temperature and generates an output current based on the second variation voltage and the current setting resistor. The variation gradient adjustment unit sets the coefficient of variation with temperature of the second variation voltage so that the difference between it and the coefficient of variation with temperature of the resistance value of the current setting resistor is within a preset first stipulated range.
Bibliography:Application Number: CN2012188950