HIGH-PRECISION OSCILLATOR

摘要

A high-precision oscillator includes a voltage reference module which includes multiple measured Field Effect Transistors and arranged for detecting process corners for the measured Field Effect Transistors to generate a reference voltage containing process corner information of the measured Field Effect Transistors, a compensation current generating module which is arranged for receiving the reference voltage, making a temperature compensation for the reference voltage, and generating a compensation current which includes both the process compensation and temperature compensation, and a ring oscillator which is arranged for receiving the compensation current and outputting a clock with stable frequency. The high-precision oscillator designs the process compensation and the temperature compensation separately, which are adjustable due to one of them will not be influenced by the other; and frequency of its outputted clock is not influenced by process and temperature, thereby precision of the outputted clock is improved.

主权项

1. A high-precision oscillator, comprising:
a voltage reference module, and the voltage reference module comprising multiple measured Field Effect Transistors and arranged for detecting process corners for the measured Field Effect Transistors to generate a reference voltage which contains process corner information of the measured Field Effect Transistors; a compensation current generating module, to which the reference voltage is inputted, to provide a temperature compensation for the reference voltage and generate a compensation current which includes both process compensation and temperature compensation; and a ring oscillator, arranged for receiving the compensation current generated by the compensation current generating module, and then outputting a clock with stable frequency according to the compensation current.