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:

New Circuits

.

 


Popular Circuits

Simple Parallel (Printer) Port Interface
Low-cost-frequency-counter
1Mhz-voltage-to-frequency-converter
Wien bridge oscillator circuit
The Gentle Touch
Enhanced 4 Digit Alarm Keypad
Sawtooth Signal Generator
iphone battery pack
lights 5GM168 control circuit diagram
Integrated operational amplifier tone control circuit of a simplified equivalent circuit a
Automatic sprinkler control circuit
Drinking driver detection circuit
Low-noise switching power supply schematic circuit diagram



Top