Quick-start crystal oscillator circuit with ultra-low power consumption

A crystal oscillator and quick start technology, applied in the direction of electrical components, impedance networks, etc., can solve the problems of high power consumption, oscillator stop vibration, low power consumption and short start-up time, and achieve the effect of low power consumption

Active Publication Date: 2013-04-24
WUXI ZHONGKE MICROELECTRONICS IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The power consumption and start-up time of the oscillator are determined by the inverter INV and the resistor R. The stronger the drive capability of the inverter INV, the larger the resistor R, the shorter the start-up time of the oscillator, but the higher the powe

Method used

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  • Quick-start crystal oscillator circuit with ultra-low power consumption
  • Quick-start crystal oscillator circuit with ultra-low power consumption
  • Quick-start crystal oscillator circuit with ultra-low power consumption

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Embodiment Construction

[0027] The invention proposes a crystal oscillator circuit with ultra-low power consumption and fast start, which is used as a reference clock source in an integrated circuit requiring fast start and low power consumption, and the circuit is realized by standard CMOS technology.

[0028] The present invention will be further described below in conjunction with specific embodiments.

[0029]The ultra-low power consumption quick start crystal oscillator circuit of the present invention comprises: self-biased class AB amplifier 21, signal amplitude detection circuit 22, reference current generation circuit 23, current mirror circuit 24, quartz crystal resonant circuit 25, digital Logic control circuit 26, the input end of described signal amplitude detection circuit 22 is connected with self-biased class AB amplifier 21, the output end of signal amplitude detection circuit 22 is connected with reference current generation circuit 23, and the output end of reference current generat...

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Abstract

The invention discloses a quick-start crystal oscillator circuit with ultra-low power consumption. The crystal oscillator circuit comprises a self-bias class AB amplifier, a signal amplitude detection circuit, a reference current generating circuit, a current mirror circuit, a quartz crystal resonance circuit and a digital logic control circuit. Passive quartz crystals are adopted in the crystal oscillator circuit, and the quick-start crystal oscillator circuit with the ultra-low power consumption is utilized for quickly starting an oscillator to generate square-wave or rectangular-wave clock signals. The output signals of the crystal oscillator circuit can provide accurate reference clocks for a digital circuit or a frequency synthesizer circuit.

Description

technical field [0001] The invention relates to an ultra-low power consumption quick-start crystal oscillator circuit, which is used as a reference clock source for a digital circuit or a frequency synthesizer circuit, and belongs to the technical field of integrated circuits. Background technique [0002] Reference clock sources are the heart of digital circuits and frequency synthesizer circuits. All logic circuits in the digital circuit work under the drive of the clock, and the clock of the digital circuit is directly generated by a reference clock or a frequency division circuit. The frequency synthesizer circuit is also a clock generation circuit, the input is a reference clock source, and the output is a clock signal with adjustable frequency. Therefore, reference clock sources play a vital role in digital circuits and frequency synthesizer circuits. [0003] The reference clock source is typically generated by a crystal oscillator circuit. The crystal oscil...

Claims

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Application Information

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IPC IPC(8): H03H9/10H03H9/19
Inventor 肖时茂潘文光
Owner WUXI ZHONGKE MICROELECTRONICS IND TECH RES INST
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