Pulse shaping circuit for crystal oscillator

Abstract

A circuit arrangement and method utilize a variable threshold, multi-stage pulse shaping circuit to pulse shape a signal output by a crystal oscillator circuit. Each stage of the pulse shaping circuit includes a Schmitt trigger that drives an input of a latch, and that has a programmable trip point controlled to reject distorted pulses generated by the crystal oscillator circuit. A variable threshold, multi-stage pulse shaping circuit may be used, for example, to generate a clock signal for an electronic circuit that is more resistant to noise and other environmental effects, thereby reducing the likelihood of clock-related errors in the electronic circuit.

Description

technical field [0001] The present invention generally relates to a method and a circuit arrangement for generating a clock signal using a crystal oscillator. Background technique [0002] Crystal oscillators are used to generate electrical signals with very precise frequencies. Electrical signals produced by crystal oscillator circuits are used in many applications that require a precise time reference, such as keeping track of time in watches, to provide a stable clock signal for digital integrated circuits and to stabilize the frequency of radio transmitters. [0003] Especially when a crystal oscillator circuit is used to generate a clock signal for a digital integrated circuit, special care must be taken to ensure that the clock signal is stable and accurate, as distortion or irregularities in such a clock signal can lead to indeterminate results and / or data corruption. [0004] Crystal oscillator circuits are generally designed as circuits where it is desirable to ...

AI Technical Summary

Problems solved by technology

However, in many cases, no solution has been provided for addressing the problem of the impact of harsh environments on crystal oscillators

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