Another great crystal oscillator circuit with BB139, a 2-nd harmonic quartz crystal and one BF214 transistor. So, the Q quartz is half of the desired transmitter frequency, L1 has 24 turns, 0.08mm Ø ...

Most of us know that a quartz clock uses a higher frequency crystal oscillator and a chain of divider circuits to generate a ...

As with many inventions, two people had the idea for an integrated circuit at almost the same time. Transistors had become commonplace in everything from radios to phones to computers, and now ...

The oscillator can be designed to operate at 3.6 GHz, then frequency divided by two to get to 1,800 MHz or by four to get to 900 MHz. Available now in bulk or on tape and reel, prices for the ...

The first computer circuit to be built on a single molecule has been unveiled by researchers in the US. It was assembled on a single carbon nanotube, a standard component of any nanotechnologist's ...

A very simple DIY crystal oscillator circuit which use a quartz for frequency stability and a good rf transistor. Use a 2-nd or 3-rd harmonic crystal, for example if you want 100MHz use a 50MHz or ...