Quick-starting low-power crystal oscillation circuit

Abstract

The invention discloses a quick-starting low-power crystal oscillation circuit comprising a crystal oscillator, an input module, a feedback module, a detection module, an acceleration module, a bias module and an output module. The crystal oscillator is connected with the input module, the input module is connected with the feedback module, the feedback module is connected with the detection module, the detection module is connected with the acceleration module and the output module, the acceleration module is connected with the bias module, the output end of the bias module is connected with the input end of the output module, the output module is connected with the crystal oscillator, and the bias module is connected with the input end of the input module. The circuit of the invention has a simple structure. By adding the detection module and the acceleration module, the circuit can start oscillation quickly. The circuit has small normal working current and low power consumption. An externally hung compensation capacitor can be removed. The quick-starting low-power crystal oscillation circuit of the invention can be widely used in the field of crystal oscillation.

Description

technical field [0001] The invention relates to the field of crystal oscillator clocks, in particular to a fast-start low-power crystal oscillator circuit. Background technique [0002] The traditional low-speed crystal oscillator circuit has a simple circuit structure and low power consumption, but the start-up time of the crystal oscillator is generally longer, usually between a few milliseconds and more than ten milliseconds; in existing circuit applications, the system is required to be able to start quickly, in order to achieve fast The effect of oscillation is to use an amplifier with a large power consumption, which increases the power consumption of the circuit; and the structure of the crystal oscillator circuit is complex. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the object of the present invention is to provide a crystal oscillator circuit with fast start-up and low power consumption. [0004] The technical so...

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Problems solved by technology

[0002] The traditional low-speed crystal oscillator circuit has a simple circuit structure and low power consumption, but the start-up time of the crystal oscillator is generally relatively long, generally between a few milliseconds to more than ten milliseconds; in existing circuit applications, the system is required to be able to start quickly, in order to achieve fast The effect of oscillation, the use of amplifiers with large power consumption increases the power consumption of the circuit; and the structure of the crystal oscillator circuit is complex

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