Programmable-attenuator


Posted on Mar 10, 2013

This circuit performs the function of dividing the input signal by a selected constant (1, 2, 4, 8, etc.). While T, Z, or L sections could be used in the input attenuator, this is not necessary since the amplifier loading is negligible and a constant input impedance is maintained. The circuit is thus much simpler and more accurate than the usual method of constructing a constant impedance ladder, and switching sections in and out with analog switches.


Programmable-attenuator
Click here to download the full size of the above Circuit.

Two identical circuits can be used to attenuate a balanced line.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Simple-vco
high gain antenna 43dB amplifier circuit
From Crystal Sets To 405 Line television
Infrared Toggle Switch schematic diagram
200M FM Transmitter
CW Practice oscillator
Line level to phono input
Multivibrator
MC81 holiday lights ASIC



Top