High-accuracy oscillator

Abstract

The invention discloses a high-accuracy oscillator. The high-accuracy oscillator comprises a voltage reference module, a compensating current generating module and an annular oscillator; the voltage reference module comprises a plurality of detected field-effect tubes, process corner detection is conducted on the detected field-effect tubes to generate reference voltage comprising process corner information of the detected field-effect tubes, and the reference voltage is input into the compensating current generating module; temperature compensation is conducted on the reference voltage by the compensating current generating module, currents having process compensation and temperature compensation are generated, and the compensating current generating module inputs the generated currents into the annular oscillator; the annular oscillator receives the currents generated by the compensating current generating module, and clocks having stable frequency are output according to the currents. According to the high-accuracy oscillator, process compensation and temperature compensation are designed independently and do not affect each other, and regulation is facilitated; in addition, frequency of the output clocks is not affected by the process and the temperature, and accuracy of the output clocks is improved.

Description

technical field [0001] The invention relates to the technical field of analog circuit oscillators, in particular to a high-precision oscillator. Background technique [0002] Existing oscillators generally have process compensation, and temperature compensation is rarely introduced, so the oscillator frequency will change with temperature changes in actual work, which is generally called temperature drift, making the clock accuracy of its output On the low side. In existing oscillators, it is generally difficult to design process compensation and temperature compensation separately, because the process compensation and temperature compensation have a mutual influence relationship, so it is difficult to adjust, and the process compensation and temperature compensation cannot be satisfied at the same time. [0003] Therefore, it is necessary to provide an improved high-precision oscillator to overcome the above defects. Contents of the invention [0004] The purpose of the...

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Problems solved by technology

It is generally difficult to design process compensation and temperature compensation separately in existing oscillators, because process compensation and temperature compensation have mutual influence, so it is difficult to adjust, and it is impossible to meet process compensation and temperature compensation at the same time

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