Oscillator structure capable of generating high-stability frequency in full condition

A high-stability, oscillator technology, applied in the direction of pulse generation, generation of electrical pulses, electrical components, etc., can solve the problems of large influence of temperature and voltage, inability to stabilize the oscillation frequency, and achieve the effect of stable output frequency

Active Publication Date: 2013-04-24
SHANGHAI HUAHONG GRACE SEMICON MFG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The existing oscillator structure is greatly affected by temperature and voltage, and cannot achieve stable oscillation frequency under various conditions

Method used

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  • Oscillator structure capable of generating high-stability frequency in full condition

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Embodiment Construction

[0013] Such as figure 1 As shown, P1, R1, and R2 form a current source reference, and P2 mirrors the current of P1 to charge C1. When the potential of C1 is higher than VR, the output of the comparator (CMP) is reversed, resulting in a Schmitt trigger with hysteresis. The output of the (Schmitt trigger) flips, controlling the conduction of the N1 tube, so that C1 discharges. At this time, the potential of C1 drops, far below VR, and the output of the comparator (CMP) flips, resulting in a Schmitt trigger with hysteresis ( The output of Schmitt trigger) is reversed to control the closing of the N1 tube, and P2 continues to charge C1 to complete an oscillation process. The above process goes round and round, and the oscillator outputs a fixed frequency.

[0014] The biggest requirement for the frequency of the clock is to achieve the stability of the output frequency under various conditions, but due to the change of the power supply voltage, it will lead to the change of the re...

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PUM

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Abstract

The invention discloses an oscillator structure capable of generating high-stability frequency in a full condition. The oscillator structure comprises a current reference current source, an image current charge-discharge circuit and a hysteresis comparator circuit. The current reference current source is composed of a P1, a R1 and a R2. The image current charge-discharge circuit is composed of a P2, a C1 and an N1. The hysteresis comparator circuit is composed of a comparator and a Schmidt comparator. A reference voltage VR generated among the P1, the R1 and the R2 is used as a comparing input end of a comparator CMP. The oscillator structure capable of generating the high-stability frequency in the full condition achieves the stability of output frequency of an oscillator in the range of full temperature and full working voltage.

Description

technical field [0001] The invention relates to the field of semiconductor integrated circuit circuit design. Background technique [0002] An oscillator (English: oscillator) is an electronic component used to generate repetitive electronic signals (usually sine waves or square waves). The circuit it constitutes is called an oscillator circuit. An electronic circuit or device that can convert direct current into an alternating current signal with a certain frequency. [0003] There are many types of oscillators, which can be divided into white-excited oscillators and other-excited oscillators according to the oscillation excitation method; can be divided into resistance-capacitance oscillators, inductance-capacitance oscillators, crystal oscillators, tuning fork oscillators, etc. according to the circuit structure; according to the output waveform Can be divided into sine wave, square wave, sawtooth wave and other oscillators. Widely used in electronics industry, medical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K3/011H03K3/3565
Inventor 周平古炯均
Owner SHANGHAI HUAHONG GRACE SEMICON MFG CORP
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