Quartz crystals

Chris Kennedy chris at mainecoon.com
Sat Oct 13 00:35:51 CDT 2007

Bryan Pope wrote:

> Speaking of the quartz crystal, when did the first one(s) 
> (approximately) come out?  

In the context of classic computing I'm guessing you're asking about
crystal controlled oscillators?

The first use of a quartz piezoid to control the frequency of an
oscillator circuit is generally credited to Cady in 1919.  The more
familiar Pierce oscillator dates to 1923.

Chris Kennedy
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