A variable frequency oscillating circuit transistor
Posted on Dec 11, 2010 9382
- Oscillator Circuits
Fig variable frequency oscillator transistor circuit, which is mainly an oscillator, the crystal resonator and varactor circuit by the transistor diode, the output of the ampli
fier, typically used to make high-frequency transistor oscillator. 30 MHz transistor circuit inductor LP is connected VT1 emitter circuit, it is connected in parallel and then in series with varactor diodes, and then with 75 p capacitor connected in series between the emitter and collector VT1. VT2, VT3 amplifier constituted after the oscillation signal is amplified by the VT3 collector electrode output. Changes between V - + - 4 varactor control voltage.