Question 13.3: FINDING THE PERFORMANCE OF A DIFFERENTIATOR A practical diff...
FINDING THE PERFORMANCE OF A DIFFERENTIATOR
A practical differentiator circuit is shown in Figure 13.14(a). The input voltage is shown in Figure 13.14(b). Use PSpice to plot the transient response of output voltage for a duration of 0 to 4 msec in steps of 50 μsec.
The PSpice schematic is shown in Figure 13.15(a) with a schematic op-amp model, V_{POS} = 15 V and V_{NEG} = −15 V. The ABM is shown in Figure 13.15(b).
The listing of the circuit file is as follows:
Example 13.3 Differentiator circuit
| SOURCE VIN 1 0 PULSE (0 1V 0 1MS 1MS 1NS 2MS) ; Pulse waveform CIRCUIT R1 1 2 100 C1 2 3 0.4UF ANALYSIS .TRAN 10US 4MS ; Transient analysis .PLOT TRAN V(4) V(1) ; Prints on the output file .END |
The plot of the transient response is shown in Figure 13.16. The output voltage is a square wave in response to a triangular input. The time constant of the circuit limits the sharp rise and fall of the output voltage.
