High-stability and low-power-consumption on-chip OSC circuit

A high stability, low power consumption technology, applied in the direction of electrical components, automatic power control, etc., can solve the problems of low current stability, high power consumption, complex structure, etc., to achieve stable current, stable oscillation frequency, and circuit The effect of simple structure

Pending Publication Date: 2017-06-20
湖南芯力特电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This traditional structure requires two comparators, the structure is relatively complex, the area is large, and the power consumption is la

Method used

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  • High-stability and low-power-consumption on-chip OSC circuit
  • High-stability and low-power-consumption on-chip OSC circuit

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0027] The invention provides an on-chip OSC circuit with high stability and low power consumption, including a charging and discharging circuit and a control circuit;

[0028] The charging and discharging circuit uses a current source to charge and discharge the capacitor, and the switch tube controls the charging and discharging of the capacitor;

[0029] The control circuit converts the level state output by the charging and discharging circuit to generate the final output signal of the oscillator, and the oscillator output signal controls the switch of the switching tube in the charging and discharging circuit;

[0030]The charging and discharging circuit includes a current source I1, a cur...

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PUM

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Abstract

The invention discloses a high-stability and low-power-consumption on-chip OSC circuit comprising a charge and discharge circuit and a control circuit. As for the charge and discharge circuit, charge and discharge of a capacitor are performed by a current source, and charge and discharge of the capacitor are controlled by a switching tube. As for the control circuit, the level state outputted by the charge and discharge circuit is converted to generate the final output signal of an oscillator, and the output signal of the oscillator controls on/off of the switching tube in the charge and discharge circuit. The circuit is simple in structure and low in power consumption so that the oscillation output function can be realized; as for the current source, current mirroring is performed by a cascode current mirror so that the stability of the generated current I1 and I2 is high, and the oscillation frequency of the OSC circuit is enabled to be stable; and an NMOS transistor M13 is a decoupling capacitor so that the power voltage can be stabilized, the generated current is enabled to be stable, the stability of the oscillation frequency of the OSC circuit can also be enhanced and the noise is low. The comparator and the control part in the prior art are omitted, and a phase inverter, a two-input NOR gate and an RS trigger are adopted so that chip area occupation is small.

Description

technical field [0001] The invention relates to an on-chip OSC circuit with high stability and low power consumption, belonging to the technical field of oscillator circuits. Background technique [0002] Oscillators, as a frequency source, are an essential part of most electronic systems and are the heart of communication systems. There are four main types of oscillators: ring oscillators, LC oscillators, crystal oscillators, and relaxation oscillators. The circuit of the ring oscillator is relatively simple, easy to oscillate, and easy to integrate, but the frequency of the delay network is not conducive to making a flexible choice, and the power consumption is high and the phase noise is large. LC oscillators are rarely used because inductors are not easily integrated in integrated circuits. Compared with ring oscillators and LC oscillators, crystal oscillators have the highest output frequency accuracy and are not affected by temperature and power supply voltage, and h...

Claims

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Application Information

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IPC IPC(8): H03L7/24
CPCH03L7/24
Inventor 张文杰杨凤谢亮金湘亮
Owner 湖南芯力特电子科技有限公司
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