Common series negative feedback amplifier

Posted on Mar 28, 2007

Common series negative feedback amplifier (2) series negative feedback amplifier shown in series is a common negative feedback amplifier. Wherein R is the resistor current nega

Common series negative feedback amplifier
Click here to download the full size of the above Circuit.

tive feedback element, because it belongs to the input circuit, output circuit belongs to the input and output circuit linked up. First, assume that an instantaneous input signal is positive (+), due to the emitter (e) of the polarity of the voltage to the base (b) the same, but also for the positive (+), increases the potential of the transistor emitter. Because the emitter voltage is equal to the input voltage Ub {-U-Uf, through feedback element R, weaken the input signal into a voltage Ube, so negative feedback is feedback elements R. A negative feedback resistor R is used to stabilize the amplifier, the greater the resistance, the entire amplifier is smaller magnification. And a negative feedback resistor R is connected in parallel to a capacitor coupling capacitor C, corresponds to the AC emitter (e) of the short-circuit, the AC signal has no negative feedback, thereby to obtain a larger magnification AC

Leave Comment

characters left:

New Circuits



Popular Circuits

Phone Call answering machine (PIC16F870)
Schematic Diagram BA1404 Stereo transmitter circuit
Single Chip FM Transmitter Circuit
thermometer dengan avr
4 order filter with a single IC project PCB
Water Level Indicator With 7-Segment Display PCB
PRUBY Documentation
Novel FM receiver circuit diagram
Dual edge triggered circuit diagram