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Oscillation frequency fluctuation reduced ring oscillation circuit and IC chip equipped with the circuit

A ring oscillation circuit and chip technology, which is applied in the direction of electric pulse generator circuit, logic circuit to generate pulse, electrical components, etc., can solve the problems that affect the application and the oscillation frequency fluctuates greatly.

Active Publication Date: 2008-03-12
ANALOGIX CHINA SEMICON
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the oscillation frequency fluctuates too much, it seriously affects its application in IC

Method used

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  • Oscillation frequency fluctuation reduced ring oscillation circuit and IC chip equipped with the circuit
  • Oscillation frequency fluctuation reduced ring oscillation circuit and IC chip equipped with the circuit
  • Oscillation frequency fluctuation reduced ring oscillation circuit and IC chip equipped with the circuit

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Embodiment Construction

[0058] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0059] According to the present invention, there is provided a ring oscillating circuit for generating multivibrator waves, which comprises an odd number of inverters connected in series, the output of the last inverter being connected to the input of the first inverter , the ring oscillating circuit is characterized in that it includes at least one of the following: a voltage regulator connected between the bandgap voltage and the power input terminal of the inverter for providing a stable bandgap voltage to the inverter; and an absolute The current circuit is used to convert the incoming bandgap voltage to provide absolute current to the inverter.

[0060] Optionally, the absolute current circuit includes at least one of the following: a power supply absolute current circuit, which is connected to the power input terminal of the in...

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Abstract

The invention discloses a ring shape oscillating circuit that consists of a regulator that is connected between the band gap voltage and the power source access end of the inverter and is used for providing stable band gap voltage for the inverter; a power source absolute current circuit that is connected to the power source access end of the inverter and is used for converting the accessed band gap voltage so as to provide power source absolute current for the inverter; an earth absolute current circuit that is connected with the earth end of the inverter and is used for converting the accessed band gap voltage so as to provide earth absolute current for the inverter. The invention also provides an integrated circuit chip that has ring shape circuit.

Description

technical field [0001] The present invention relates to a semiconductor integrated chip (IC), more specifically, to a ring oscillator circuit (Ring Oscillator) with relatively stable oscillation frequency, and an IC chip with the ring oscillator circuit. Background technique [0002] A multivibrator is a self-oscillating circuit. Because there is no stable working state, the multivibrator is also called an astable circuit. Specifically, if the multivibrator is in the 0 state at the beginning, it will automatically turn to the 1 state after staying in the 0 state for a period of time, and will automatically turn to the 0 state after staying in the 1 state for a period of time, and so on. The output rectangular wave. The multivibrator is used to generate a rectangular wave with a certain frequency and amplitude, and can be used as a clock generator in micro-control circuits, etc. [0003] FIG. 1 shows a circuit diagram of a symmetrical multivibrator in the related art, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K3/03H03K3/011
Inventor 王勇
Owner ANALOGIX CHINA SEMICON
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