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Article #9255

Re: Crystal oscillator load capacitance

#9255
From: Mr Background
Date: Thu, 03 Jan 1991 22:30
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Book Review published in _Speleonics 14_ (Feb. 1990):

_Crystal Oscillator Circuits_ by R.J.Matthys.
    Wiley and Sons, 1983, ISBN 0-471-87401-9.

This is a very practical book; it describes many types of crystal 
oscillator circuits with the underlying design criteria, then 
summarizes in table form the advantages and disadvantages of each 
circuit. The author has then constructed each circuit operating at 
three different frequencies (1, 10, and 100 MHz) and presents 
photographs of the output waveforms, as well as tests for sensitivity 
to cold, heat, and supply voltage. An example of the useful 
information to be found is a table where the effects of various ways 
to trim the frequency of an oscillator are summarized.

I used the data in the book to make an oscillator for CB crystals, the 
commonly available third-harmonic crystals which operate near 27 MHz. 
I used the Colpitts design in a circuit that ensures the _crystal_ 
oscillates at the harmonic frequency, rather than the common but 
cruder method of operating the crystal at its fundamental and driving 
a resonant tank circuit, a method which produces poorer waveforms and 
much more noise. That is just one example of the nice touches and 
useful information found throughout this book.
                                                      -- Ian Drummond 

The bad news:  The book costs > $40.

--

Frank Reid   W9MKV   reid@ucs.indiana.edu
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From: daemon@silver.ucs.indiana.edu (Mr Background)
Newsgroups: sci.electronics
Subject: Re: Crystal oscillator load capacitance
Message-ID: <1991Jan3.223049.20252@bronze.ucs.indiana.edu>
Date: 3 Jan 91 22:30:49 GMT
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