Broadcast-band-rf-amplifier


Posted on Feb 10, 2013

The circuit has a frequency response ranging from 100Hz to 3 MHz; gain is about 30 dB. Field-effect transistor Q1 is configured in the common-source self-biased mode. Optional resistor R1 allows you to set the input impedance to any desired value; commonly, it will be 50 0. The signal is then direct coupled to Q2, a common-base circuit that isolates the input and output stages and provides the amplifier`s exceptional stability.


Broadcast-band-rf-amplifier
Click here to download the full size of the above Circuit.

Last, Q3 functions as an emitter follower, to provide low output impedance at about 50 O.!fyou need higher output impedance, include resistor R8. It will affect impedance according to this formula: RS "" RoUT -50. Otherwise, connect output capacitor C4 directly to the emitter of Q3.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

lamp dimmer
theremin as a capacitive sensing device
simple analog comparator
car battery charger schematics
Radio Amplifiers Circuits
HS-3182 ARINC 429 Bus Interface Line Driver Circuit
super simple shortwave receiver circuit
Outdoor surveillance with condenser microphones
TWO SLEW RATES
Voltage-controlled oscillator
Eliminate hum instrumentation amplifier INA101 circuit



Top