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Oscillation device

一种振荡装置、石英振荡的技术，应用在调节电变量、控制/调节系统、仪器等方向，达到减小消耗电流、消耗电流减小的效果

Inactive Publication Date: 2013-04-10
SII SEMICONDUCTOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the prior art, the difference between the gradient of the constant voltage versus the temperature change and the gradient of the oscillation stop voltage versus the temperature change and the current consumption of the constant voltage circuit are in a trade-off relationship.

Method used

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  • Oscillation device
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Embodiment Construction

[0018] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0019] FIG. 1 is a schematic diagram showing an oscillation device according to this embodiment. The oscillation device 100 includes: a constant voltage circuit 10 that generates a constant voltage; and a crystal oscillation circuit 20 that uses the generated constant voltage to oscillate a crystal oscillator.

[0020] FIG. 2 is a circuit diagram showing an internal configuration of a constant voltage circuit of the oscillation device according to the present embodiment. The constant voltage circuit 10 includes a reference voltage circuit 101 , a differential amplifier circuit 102 , PMOS transistors MP1 and MP2 , an NMOS transistor MN5 , and a temperature characteristic adjustment element 30 .

[0021] The reference voltage circuit 101 is composed of a constant current source 11 and an NMOS transistor MN1. The source of the NMOS transistor MN1 is grounded, and the gat...

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Abstract

There are disclosed a constant voltage circuit which can realize a low consumption current, and a crystal oscillation circuit using the constant voltage circuit. The constant voltage circuit is provided with a temperature characteristic regulation element, so that it is possible to minimize a difference between a negative tilt of a constant voltage to a temperature change and a negative tilt of the smallest operation voltage that can oscillate in the crystal oscillation circuit to the temperature change, and accordingly the consumption current of the crystal oscillation circuit can be decreased. Furthermore, when a constant current generated by the constant voltage circuit is decreased, the consumption current of the constant voltage circuit can be decreased, and the consumption current of the whole oscillation device can be decreased.

Description

technical field [0001] The present invention relates to an oscillating device including a quartz (crystal) oscillating circuit, and more particularly to a constant voltage circuit capable of reducing current consumption of the quartz oscillating circuit. Background technique [0002] A conventional oscillation device includes a constant voltage circuit for generating a constant voltage, and a crystal oscillation circuit for oscillating a crystal oscillator using the generated constant voltage. Such an oscillator is widely used in timepieces, mobile phones, personal computer terminals, etc., and it is required to suppress current consumption. [0003] In order to suppress the current consumption, it is important to reduce the voltage for driving the crystal oscillation circuit as much as possible in the oscillation device. On the other hand, a quartz oscillation circuit has an oscillation stop voltage that depends on the oscillation characteristics of a quartz oscillator, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/567
CPCG05F1/567
Inventor 村田正哉渡边考太郎见谷真
Owner SII SEMICONDUCTOR CORP
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