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Oscillator

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yasir_ali

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Hello.
can any one tell me which Oscillator is the Best for a range in Mhz? And which Oscillator has the best Stability in all aspects?
thanks
 
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A crystal oscillator is high frequency and is extremely stable.
 
At 1MHz you can use just about any kind of oscillator you like: crystal, LC or RC will all work and are practical, each has its advantages and disadvantages.

Does it need to be adjustable?

A crystal oscillator is very stable but it's not very adjustable unless you use a PLL which is complicated.

RC and LC oscillators aren't quite as stable but at least the frequency can be easily adjusted.
 
A crystal oscillator is very stable but it's not very adjustable unless you use a PLL which is complicated.

I don't see how a PLL would increase how much a crystal oscillator can be adjusted.

With a fundamental crystal, you can adjust by maybe +/- 500ppm at most. An overtone crystal can't be adjusted nearly as much. A PLL can only automate the adjustment, it can't increase it.
 
The BH14xx FM stereo transmitter ICs use a single 7.6MHz crystal oscillator and a frequency sythesizer using a PLL to obtain 4 different FM channels that are selected with a DIP-switch.
 
I don't see how a PLL would increase how much a crystal oscillator can be adjusted.

With a fundamental crystal, you can adjust by maybe +/- 500ppm at most. An overtone crystal can't be adjusted nearly as much. A PLL can only automate the adjustment, it can't increase it.

I meant, a PLL can be used as a frequency multiplier with an adjustable multiplication factor so it's possible to vary the frequency of the output.
 
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