03-09-2016, 12:30 PM
1452452105-clippersclampersChapter23.pdf (Size: 587.75 KB / Downloads: 6)
CLIPPERS
Clippers are networks that employ diodes to “clip”away a portion of an
input signal without distorting the remaining part of the applied
waveform. The simplest form of diode clipper is one resistor and a
diode similar like half-wave rectifier. There are two categories:
series and parallel
CLAMPERS
Clampers are electronics circuit that clamps or shifts an entire signal
voltage by a dc level. The shape of the output waveform is exactly the
same as that of the input waveform.
Technique for determining the clamped output
waveforms:
1. Assume capacitor was uncharged initially.
2. Find initial output voltage, v
O
-
. 3. Determine the capacitor polarity if it were charged
for the T/4 cycle duration.
4. Assume polarity in (3) and
v
C maximum, then write
the KVL equation for the output voltage:
v
O = v
O
- +vI - v
C
5. Find the minimum and maximum values for the
output by using the equation in (4).
6. Sketch the waveform, the shape is the same as the
input waveform, only the peak values are different.