RC filters-operation-circuit-diagram

Posted on Feb 6, 2014

The drawbacks of pi-filters are the comparatively larger cost, more weight, bigger size and external field developed by the series inductor. However, these drawbacks can be overcome by replacing the series inductor by a series resistor R. Such a circuit is called the R-C filter circuit and is given in figure. By deliberate design R is kept much la

RC filters-operation-circuit-diagram
Click here to download the full size of the above Circuit.

rger than XC1 at the ripple frequency. So the ripples are dropped across series resistor R instead of across the load resistor RL. Typically R is kept at least 10 times greater than XC2; this means that each section reduces the ripples by a factor of at least 10. The main drawback of R-C filter is the large voltage drop in the series resistor R i. e. poor voltage regulation. It also needs adequate ventilation to dissipate the heat developed in the resistor R. Thus R-C filter is suitable only for light loads (small load current or large load resistance).

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Overvoltage Protection for the LM317
    Frequency comparator II
    Sine Wave Generator Circuit
    TS555 Timer
    Audio monitoring system
    electronic dice
    A digital display timer circuit diagram