FREQUENCY CONTROL METHOD AND CIRCUIT FOR RING OSCILLATOR

WIPO Patent Application WO/2015/172555

A1

Provided are a frequency control method and circuit for a ring oscillator. The method comprises the following steps: obtaining, by means of a current bias circuit, a current having a positive temperature coefficient; using the current having the positive temperature coefficient to obtain a voltage having a positive temperature coefficient that is in set proportion to the current having the positive temperature coefficient; and applying the voltage having the positive temperature coefficient to a ring oscillator to obtain a stable output frequency. The method prevents the output frequency of the ring oscillator from being affected by temperature, and greatly improves stability of the output frequency. The method prevents an external power source from affecting the output frequency of the ring oscillator, and provides a good power supply rejection ratio. When each component of the current bias circuit, a voltage generation circuit and the ring oscillator is manufactured by the same process, the change of a threshold voltage of each component with temperature is identical, and the influence of the manufacturing process to the output frequency of the ring oscillator can be compensated.

LI ZHENGUO (CN)
YUAN YIDONG (CN)
HU YI (CN)
YANG XIAOKUN (CN)
WANG MIN (CN)
MA YONGWANG (CN)

PCT/CN2014/093455

November 19, 2015

December 10, 2014

Click for automatic bibliography generation  

STATE GRID CORP CHINA SGCC (CN)
BEIJING NARI SMARTCHIP MICROELECTRONICS COMPANY LTD (CN)

H03L1/02

CN101751062A	2010-06-23
US20090051443A1	2009-02-26
US20060097805A1	2006-05-11
US5180995A	1993-01-19
US5465063A	1995-11-07

GENUINEWAYS INC. (CN)
北京中誉威圣知识产权代理有限公司 (CN)

View/Download PDF      PDF Help

Previous Patent: ELECTROMAGNET OPENING DEVICE FOR DEPOSIT BOX OR SAFE BOX

Next Patent: GALLIUM-DOPED POLYCRYSTALLINE SILICON INGOT AND PREPARATION METHOD THEREFOR