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Oscillators v Crystals

jfurness

Oscillators in a modern circuit - are Crystals still the most accurate way of timing?

  • I think crystals offer the best value when considering accuracy, size, and power consumption - certainly for general applications.  If long term accuracy is required then sync into the Rugby clock. For ultra high stability you need to get exotic.

    Trimmed silicon based oscillators are the ones to watch (sorry no pun intended!) they seem to be getting better every year and will displace resonators and cheap crystals.

  • in reply to Former Member

    I agree with your opinion. so far there is a new non-crystal silicon oscillator available which can be looked as a significant technical innovation. Because of the great improvement of the vibration functionality, the frequency difference resulted from the variation of operating temperature range, initiation frequency accuracy, voltage supply and output load can be compensated. Therefore it can be used in many customer electronic products.
    The non-crystal silicon oscillator is an emerging technique, let's wait and see how it goes.

  • My first posting on this (abeit ancient) thread.

     

    If cost is an issue, use crystals.  If time to market, oscillators.  If both (wince) I would go with a crystal circuit.

     

    Note: this does not apply to chips that appear to give you a choice between crystals and oscillators.  Be sure you read the data-sheets thoroughly image

  • in reply to Former Member

    Well I agree...if cost matters do select the xtal..

     

    It is always better to read the data sheet thoroghly before chossing either..

     

    I have notices that In cases, oscillator are better than xtal where timing is crucial eg. if you are using 10/100Mb network phy use..XTAL as input clock source..but if using 1Gb network phy I would suggest to use oscillator..

     

    If you are intended to desing more robust system use " Oscillator "..

     

    Also if you are designing some server type application I would suggest Oscillator

     

    Best Regards,

    Rizwan Hirani