Capacitor &Crystal

[balaseven]

Hi all,

Whats the use of capacitors connected to input and output pins of crystals.i.e one terminal of capacitor is connected to crystal pins other terminal to ground.

What the use of capacitor here?

[sauravgoswami]

they are used to control the requency and avoid the crystal goin into resonance

[rongo024]

To reduce noise...Actually it helps to smooth operation..

[josenit1787]

Originally Posted by rongo024

To reduce noise...Actually it helps to smooth operation..

It will be of great help if you could elaborate this point a little more.
Thankyou.

[just2rock]

Let me tell you guys,peizo electric crystals or quartz crystals has timer functionality.So to keep an operational accuracy ,capacitors are grounded,be it from i/p pin or o/p,only for bypassing any surge voltage to get inside the device & damage the same,since crystals are very sensitive to fluctuating current

[neo1786]

the capacitors will ground any spikes produced by the crystal and ensure tht no high frequency comp enters ur circuit.