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

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...

AI Technical Summary

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 power consumption.

Conversely, the smaller the resistance, the smaller the power consumption of the oscillator, but the oscillator may stop

Therefore, traditional crystal oscillators cannot solve the problems of low power consumption and short start-up time at the same time

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