Comprehensive Problems
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Comprehensive Problems
- 14.98 A certain electronic test circuit produced a resonant curve with half-power points at 432 Hz and 454 Hz. If Q = 20, what is the resonant frequency of the circuit?
- 14.99 In an electronic device, a series circuit is employed that has a resistance of 100 Ω, a capacitive reactance of 5 kΩ, and an inductive reactance of 300 Ω when used at 2 MHz. Find the resonant frequency and bandwidth of the circuit.
- 14.100 In a certain application, a simple RC low-pass filter is designed to reduce high frequency noise. If the desired corner frequency is 20 kHz and C = 0.5μF, find the value of R.
- 14.101 In an amplifier circuit, a simple RC high-pass filter is needed to block the dc component while passing the time-varying component. If the desired rolloff frequency is 15 Hz and C = 10μF, find the value of R.
- 14.102 Practical RC filter design should allow for source and load resistances as shown in Fig. 14.110. Let R = 4 kΩ and C = 40-nF. Obtain the cutoff frequency when:
Figure 14.110 For Prob. 14.102.
14.103 The RC circuit in Fig. 14.111 is used for a lead compensator in a system design. Obtain the transfer function of the circuit.
Figure 14.111 For Prob. 14.103.
14.104 A low-quality-factor, double-tuned band-pass filter is shown in Fig. 14.112. Use PSpice or MultiSim to generate the magnitude plot of Vo(ω).
Figure 14.112 For Prob. 14.104.