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Reference voltage circuit and electronic device

a reference voltage circuit and circuit technology, applied in the field electronic devices, can solve the problem that the current consumption of reference voltage circuits cannot be reduced

Active Publication Date: 2016-09-01
ABLIC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Enables reduced current consumption and precise, stable reference voltage output across various operation modes, including a low current consumption mode and sleep / power down mode, by adjusting circuit configurations using switching elements.

Problems solved by technology

However, the related art has a problem in that, in an electronic device having an operation mode supposed to suppress current consumption of the reference voltage circuit, an operation mode required to output a precise and stable reference voltage, and other operation modes, the current consumption of the reference voltage circuit cannot be reduced.

Method used

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  • Reference voltage circuit and electronic device
  • Reference voltage circuit and electronic device
  • Reference voltage circuit and electronic device

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Embodiment Construction

[0015]FIG. 1 is a circuit diagram for illustrating a reference voltage circuit according to an embodiment of the present invention.

[0016]The reference voltage circuit of this embodiment includes a first power line 101, a second power line 100, a reference voltage output terminal 10, a reference voltage output terminal 11, an N-type depletion MOS transistor 1, an N-type depletion MOS transistor 3, an N-type enhancement MOS transistor 2, a resistor 4, a resistor 5, a switching element 6, a switching element 7, a switching element 8, and a switching element 9.

[0017]The first power line 101 is connected to a first terminal of the switching element 6 and a first terminal of the switching element 7. The N-type depletion MOS transistor 1 has a drain connected to a second terminal of the switching element 6, and a gate, a source, and a back gate connected to a first terminal of the switching element 8. The N-type enhancement MOS transistor 2 has a drain connected to the first terminal of th...

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Abstract

Provided is a reference voltage circuit capable of forming optimal circuits for various modes of an electronic device. The reference voltage circuit includes, between respective transistors forming the reference voltage circuit and between the transistors and a power supply terminal, switching elements configured to switch a circuit configuration of the reference voltage circuit.

Description

RELATED APPLICATIONS[0001]This application claims priority under 35 U.S.C. §119 to Japanese Patent Application No. 2015-037332 filed on Feb. 26, 2015, the entire content of which is hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a semiconductor device configured to output a constant reference voltage.[0004]2. Description of the Related Art[0005]As a reference voltage circuit capable of outputting a stable voltage even with power supply voltage fluctuations and temperature fluctuations, for example, a circuit illustrated in FIG. 3 has hitherto been used (see Japanese Patent Application Laid-open No. 2007-266715).[0006]A related-art reference voltage circuit 503 includes an N-type depletion MOS transistor 51, an N-type depletion MOS transistor 56, an N-type enhancement MOS transistor 52, and a resistor group 58.[0007]However, the related art has a problem in that, in an electronic device having an opera...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H03K17/687
CPCH03K17/687G05F1/563G05F3/00G05F3/02G11C5/143G11C5/147
Inventor MAETANI, FUMIHIKOKOIKE, TOSHIYUKI
Owner ABLIC INC