Design of an externally adjustable oscillator circuit

Tao lan; Shengming Huang; Quanzhen Duan; Lulu Xun

doi:10.1117/12.2640492

15 July 2022 Design of an externally adjustable oscillator circuit

Tao lan, Shengming Huang, Quanzhen Duan, Lulu Xun

Proceedings Volume 12258, International Conference on Neural Networks, Information, and Communication Engineering (NNICE 2022); 122582H (2022) https://doi.org/10.1117/12.2640492
Event: International Conference on Neural Networks, Information, and Communication Engineering (NNICE 2022), 2022, Qingdao, China

Abstract

In view of the traditional RC oscillator's low accuracy and inability to be adjusted, a new repairable and adjustable high-precision RC oscillator is proposed. The oscillator is composed of two inverters, comparators, controllable switches, capacitors and resistors. The comparator generates output voltage by comparing the capacitor voltage value and the reference voltage value. At the same time, it controls the working state of the switching MOS tube to complete the cyclic charge and discharge of the capacitor. The two groups of capacitors charge and discharge alternately, and then produce continuous oscillation waveform. The high-frequency clock is realized by alternating comparison between bilateral comparator and bias voltage. The advantage of this mode is that the oscillation frequency is only related to the charging time, but has nothing to do with the discharge time. There is no need to consider the influence of the discharge time delay on the frequency. In this paper, the coarse adjustment of the accuracy of the oscillator is realized by adjusting the charging current of the capacitor, and then the output of the oscillator is accurately adjusted by selecting the capacitance value of the capacitor.

Citation Download Citation

Tao lan, Shengming Huang, Quanzhen Duan, and Lulu Xun "Design of an externally adjustable oscillator circuit", Proc. SPIE 12258, International Conference on Neural Networks, Information, and Communication Engineering (NNICE 2022), 122582H (15 July 2022); https://doi.org/10.1117/12.2640492

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KEYWORDS

Capacitors

Oscillators

Capacitance

Resistors

Resistance

Calibration

Clocks

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