Title:
LOW-TEMPERATURE COEFFICIENT RING OSCILLATOR, CHIP, AND COMMUNICATION TERMINAL
Document Type and Number:
WIPO Patent Application WO/2022/100755
Kind Code:
A1
Abstract:
Disclosed in the present invention are a low-temperature coefficient ring oscillator, a chip, and a communication terminal. The low-temperature coefficient ring oscillator comprises a temperature tracking compensation circuit, an inverter oscillation circuit, and a buffer shaping circuit. The temperature characteristics of the impedance of a PMOS tube and an NMOS tube in an inverter in the inverter oscillation circuit are tracked and compensated for by means of the impedance, along with temperature change, of a PMOS tube and a NMOS tube connected by a diode. Moreover, on the basis of a bias current having a specific temperature coefficient, and by adjusting the proportional relationship between temperature coefficients of variables in the temperature tracking compensation circuit, the temperature characteristics of the impedance of the PMOS transistor and the NMOS transistor connected by the diode are converted into a voltage having compensation temperature characteristics, and then, the voltage is used as a power supply voltage of the inverter oscillation circuit; thus, the oscillation frequency of a clock signal output by the ring oscillator is hardly affected by temperature.
Inventors:
GAO CHENYANG (CN)
WANG YONGSHOU (CN)
LIN SHENG (CN)
WANG YONGSHOU (CN)
LIN SHENG (CN)
Application Number:
PCT/CN2021/130948
Publication Date:
May 19, 2022
Filing Date:
November 16, 2021
Export Citation:
Assignee:
SHANGHAI VANCHIP TECH CO LTD (CN)
International Classes:
H03L7/099
Foreign References:
| CN112350722A | 2021-02-09 | |||
| CN104242820A | 2014-12-24 | |||
| CN106656111A | 2017-05-10 | |||
| CN109857183A | 2019-06-07 | |||
| US20160028406A1 | 2016-01-28 | |||
| CN204928774U | 2015-12-30 |
Attorney, Agent or Firm:
BEIJING GENIUS ESSEN INTELLECTUAL PROPERTY OFFICE (CN)
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