LOW-POWER BANDGAP REFERENCE VOLTAGE CIRCUIT

Japanese Patent JP3954594

B2

PROBLEM TO BE SOLVED: To provide a voltage circuit which generates a low-power bandgap reference voltage by a method of simultaneously generating and summing a current directly proportional to the absolute temperature and a current directly proportional to a voltage between a base and an emitter by utilizing current mirror circuits and the smaller number of resistances.
SOLUTION: The voltage circuit is provided with; a first current source which provides a current (IPTAT) directly proportional to the absolute temperature and has an input end coupled to a first voltage; a second current source which provides a current (IPTVBE) directly proportional to the voltage between the base and the emitter and has an input end coupled to the first voltage and has an output end coupled to an output end of the current source providing the current directly proportional to the absolute temperature; and a first resistance which has one end coupled to output ends of the first and second current sources and has the other end coupled to a second voltage, and the sum total of currents generated by the first and second current sources is utilized to generate a low-power bandgap reference voltage in the first resistance.

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Feng Ulwen

JP2004130724A

August 08, 2007

April 27, 2004

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Toru Semiconductor Semiconductor Co., Ltd.

G05F3/24; G05F3/30; H03F3/343; (IPC1-7): G05F3/24; H03F3/343

JP9160663A

Takehiko Suzue
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto

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