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Ring oscillator with technology and temperature compensation

A ring oscillator and temperature compensation technology, which is applied in the direction of electric pulse generator circuit, pulse generation, electrical components, etc., can solve the problems of ring oscillator ring vibration frequency temperature changes, etc., and achieve the effect of frequency stability

Active Publication Date: 2016-12-07
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem in the prior art that the ring vibration frequency of the ring oscillator is affected by process parameters and temperature changes

Method used

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  • Ring oscillator with technology and temperature compensation
  • Ring oscillator with technology and temperature compensation
  • Ring oscillator with technology and temperature compensation

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specific Embodiment approach 1

[0039] Specific implementation mode one: the following combination Figure 1 to Figure 8 This embodiment mode will be described. The ring oscillator with process and temperature compensation described in this embodiment mode will be described.

[0040] figure 1 It is an overall functional block diagram of a ring oscillator, which includes a delay unit 1 , a process compensation module 3 and a temperature compensation module 2 . The delay unit 1 is composed of an odd number of inverters, the oscillation frequency of which is affected by process variation and temperature drift, and is positively correlated with its supply voltage; the process compensation module 3 includes a compensation circuit and an LDO power supply voltage generation circuit, Generate a supply voltage related to process changes; the temperature compensation module 2 is a current generation circuit that is independent of temperature. Through the process compensation module 3, the voltage related to the pro...

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Abstract

The invention discloses a ring oscillator with technology and temperature compensation and belongs to the field of oscillators. The ring oscillator with technology and temperature compensation aims to solve the problem of the prior art that the ring oscillation frequency of a ring oscillator is affected by technological parameters and temperature change. The ring oscillator comprises a delay unit, a temperature compensation module and a technology compensation module, wherein the delay unit comprises an odd number of inverters with a capacitor as a load, and a main circuit of the temperature compensation module is a two-level temperature compensation type band-gap reference current source, generates supply current I_pow basically irrelevant to temperature and provides the supply current to the delay unit so that oscillation frequency is not affected by temperature change basically; the technology compensation module generates voltage which changes synchronously with technology by means of a MOS tube connected with a diode, and reflects the voltage on supply voltage ULdo_out of the delay unit through LDO for technological compensation.

Description

technical field [0001] The present invention belongs to the field of oscillators. Background technique [0002] Simply put, an oscillator is a frequency source, which can convert DC power into AC power itself without external signal excitation. Oscillators have been playing an important role in the fields of communications, electronics, navigation and aviation, medical equipment, and instrumentation since their birth. Oscillators can be divided into self-excited oscillators and other-excited oscillators according to their oscillation methods; according to the types of output waveforms, they can be divided into sine wave, square wave, sawtooth wave and other oscillators; according to their topology, they can be divided into three types: Ring Oscillators, Hysteresis Oscillators, and LC Oscillators. [0003] In recent years, the research on oscillators using CMOS technology has mainly focused on LC oscillators and ring oscillators. The noise performance of LC oscillators is b...

Claims

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Application Information

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IPC IPC(8): H03K3/011H03K3/03
CPCH03K3/011H03K3/0315
Inventor 李景虎韩良刘梦飞
Owner HARBIN INST OF TECH AT WEIHAI
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