Resistor and Capacitor in Parallel

Chapter Resistor and Capacitor in Parallel

Complete Electronics Self Teaching Guide with Projects
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Complete Electronics Self Teaching Guide with Projects

  • CHAPTER 6 FILTERS246RESISTOR AND CAPACITOR IN PARALLEL26  The circuit shown in Figure 6.32 is a common variation on the low-pass filter circuit introduced in problem 15.VinVoutCR2R1FIGURE 6.32Because a DC signal will not pass through the capacitor, this circuit functions like the circuit shown in Figure 6.33 for DC input signals.VinDC VoutR2R1FIGURE 6.33An AC signal will pass through both the capacitor and R2. You can treat the circuit as if it had a resistor with a value of r (where r is the parallel equivalent of R2 and XC) in place of the parallel capacitor and resistor. This is shown in Figure 6.34.VinDC VoutrR1FIGURE 6.34Book Authorc06V107/04/2012 3:08 PM c06.indd 2467/4/2012 3:10:16 PM