The equivalent circuit and a local oscillator


Posted on Nov 10, 2015

The local oscillator at 1GHz or more to use more common collector circuit, it is not easy to produce low-frequency self-oscillation.


The equivalent circuit and a local oscillator
Click here to download the full size of the above Circuit.

Typically the local oscillator signal to go through a buffer amplifier stage impulse applied to the mixer, mixing action to reduce the impact on the local oscillator frequency stability. Native oscillator and the like as shown in the equivalent circuit, are co-collector capacitance feedback oscillator circuit. When tuning voltage value changes, the capacitor connected to the oscillator circuit varactor amount of change, leading change the oscillation frequency, and thus can achieve channel selection.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Tiny 1MHz Lowpass Filter Uses No Inductors
Simulated inductor
Tachometer
Capacitive load driver
Oscilloscope triggered sweep circuit
Laser Listening Device
ne555 police siren circuit
Controlling a relay with a digital logic level circuit
7809 Pin and
Transistor time relay circuit
Precision Analog VU-meter Circuit



Top