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Clock (Oscillator) circuits

 
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jenalcom

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Joined: 10 Apr 2004
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Location: Perth, Western Australia

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PostPosted: Tue Jan 26, 2010 11:03 am    Post subject: Clock (Oscillator) circuits Reply with quote

Couple of circuits for clock (oscillator) generators.

Download and Unzip to get PDF files.

16MHz circuit divides by 1, 2, 4, 8, 16, 32 and 64 and produces outputs at: 16MHz, 8MHz, 4MHz, 2MHz, 1MHz, 500KHz and 250KHz.

20MHz circuit divides by 1, 2, 10, 20, 100, 200 and 1000 and produces outputs at: 20MHz, 10MHz, 2MHz, 1MHz, 200KHz, 100KHz and 20KHz.

These are just frequencies I needed for different projects. Use different dividers and start frequencies for what you need/want.

A good source of 20MHz crystal oscillator units are old ethernet boards. These units usually have 4 pins (5v and output plus 1 or 2 ground pins).

A simple unit could be made using a 4060 chip (oscillator/binary divider) using a simple RC oscillator method (see 4060 datasheet) and using the various outputs as required. Don't forget to put a buffer on the output if needed.
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