bipolar junction transistor
Frequency Modulator Transmitterusing bipolar junction transistor?
I need a brief description with the block diagram, circuit diagram transmitter FM using this BJT is not a project for a mission to be shown
Try Radio Shack. If no RS store near you, try one or Hartley oscillator Colpitts, using BJT's. (You probably can not do with just a single semiconductor device, the function is more complicated than that.) Then use something like varactor diode (also known as a variable capacitance diode) to make adjustments. Use a good quality glass or ceramic microphone, and the stress that impairs the ability of the diode, which, in turn, the transmitter frequency change slightly, which is what you want. If one calculates carefully and chose correctlly components, can diffuse in the middle of the FM band (in Latin, 88 – 108 MHz). You can listen to your own FM radio, then. To avoid violation of the laws of the FCC, make sure that its signal is less than 100 milliwatts (1 / 10 Watt) and the antenna is less than 10 feet long. Have fun! 5 of 06 hrs noviembre 1515 GMT.
Lecture-26-Bipolar Junction Transistor
