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UHF (Ultra High Frequency) Circuits
Last Updated on:
Friday, March 12, 2010 12:07 PM |
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Circuits Designed by Dave Johnson, P.E. : |
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200MHz400MHz VOLTAGE controlled OSCILLATOR
If you need a clean emitter coupled logic (ECL) type signal between 200MHz and
400MHz this circuit works fine. It uses four voltage-controlled capacitors to change
the frequency.
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Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
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VHF/UHF Prescaler - The recommended Prescaler is ridiculously simple. It consists
of just one IC, a TV tuner prescaler, the Philips SAB6456A, which can divide by 64 or
by 256. This chip is widely available both new and in the surplus market at much lower
prices than conventional divide by 10 prescalers. (added 08/08/08) |
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VHF/UHF TV Modulator - Simple oscillator that generates a frequency in the VHF or
UHF region. The oscillator is modulated with the video signal and the modulated
carrier wave thus generated is fed into the TV set's aerial input via a cable. Then
all that remains to do is tune the TV to the correct frequency. |
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UV light Box - (electronic circuit added 4/05) |
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