The RL circuit may also be used as an
integrating circuit. An integrated waveform may be obtained from the series RL
circuit by taking the output across the resistor. The characteristics of the
inductor are such that at the first instant of time in which voltage is
applied, current flow through the inductor is minimum and the voltage developed
across it is maximum.
Therefore, the value of the voltage drop across
the series resistor at that first instant must be 0 volts because there is no
current flow through it. As time passes, current begins to flow through the
circuit and voltage develops across the resistor. Since the circuit has a long
time constant, the voltage across the resistor does NOT respond to the rapid
changes in voltage of the input square wave. Therefore, the conditions for
integration in an RL circuit are a long time constant with the output taken
across the resistor.
There are a variety of diode network called
clippers that have the ability to-“clip” off a portion of the input signal
without distorting the remaining part of the alternating waveform. The half
wave rectifier is an example of the simplest form of diode clipper one resistor
Depending on the orientation of the diode, the
positive or negative region of the input signal is- “clipped” off. There are
two general categories of clippers: series and parallel. The series
configuration is defined as one where the diode is in series with the load,
while the parallel variety has the diode in a branch parallel to the load.