Oscillator circuits & RF

This is a Simple IF signal generator circuit using CMOS IC CD4011 as oscillator -CD4040 as divider and crystal-3.579 MHz into output AM: frequency 455 KHz Read more

This is FM receiver circuit using sex transistors that very small size and cheap, The trimer capacitor To control the frequency from 87MHz to 108 MHz. Read more

These are the wideband active antenna circuits for the SW/MW/FM radio receiver. We can try to test it with many brands of radios. Why should we use this circuit? In normal, we short-wave radio receiver. We need to use a long antenna. But with the helping of this circuit, we can use the only 18-inch … Read more

We have many ways to make the function generator. Using NE566/LM566 is a good choice. Because it easy to use. It looks like a NE555 timer. And we often use the NE566 as Voltage controlled oscillator or VCO circuit. It is a type of oscillator. We can control the frequency of the output with the … Read more