Showing posts with label attenuator. Show all posts
Showing posts with label attenuator. Show all posts
Monday, August 12, 2013
Simple Programmable Attenuator Circuit
This Simple Programmable Attenuator 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. Two identical circuits can be used to attenuate a balanced line .
Simple Programmable Attenuator Circuit
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