Buffered Crystal VXO


Posted on Jan 21, 2013

The circuit is an VXO with buffered output. It operates on 20-meter amateur radio band with the output voltage about 0.2 Vp-p. The crystal frequency is pulled by tuning the variable capacitor CV1 about 36Khz with only one crystal (Y1), and 250Khz by using two crystals Y1 and Y2. The first configuration stability is much better than using two crystals. However, if you need more frequency variation, use two crystals and you have to pay the cost by getting less stability.


Buffered Crystal VXO
Click here to download the full size of the above Circuit.

By the way, the value of the inductor L1 is critical to achieve the most frequency variation. You can use it in transmitters, receivers and transceivers with good results.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Edge-detector
    Digital Clock Using Microcontroller 89C52/89S52
    Sound Level Indicators
    Controlling the Air Muscle actuators
    LM4819 audio power amplifier circuit
    Battery status indicator circuit diagram
    555 electronic circuit diagram of a Christmas tree



    Top