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More  Charge Pump Circuits   Square Wave Oscillators  
Voltage Controlled Oscillators (VCO)

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.

Click on Drawing Below to view PDF version of Schematic

Circuit 200MHz400MHz VCO designed by David A. Johnson, P.E.  (March 19, 1999)

More  Charge Pump Circuits  
Square Wave Oscillators  
Voltage Controlled Oscillators (VCO)

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