Q1 (a) Sketch a schematic diagram of a high-pass filter circuit created with a single op-amp which has: i) High frequency input impedance of 20 k? ii) High frequency gain of – 50 iii) Cut off frequency of 25 kHz. (b) Fig Q1 shows an amplifier system. i) What is the unloaded voltage gain of the system in dB? ii) What is the overall voltage gain of the system in dB R_s = 1 k? Amplifier R_out = 25 ? V_s R_in = 100 k? A_v = 100 R_L = 1 k? Fig Q1 (c) Sketch the Bode plot of the filter. (d) Modify your design so that the circuit operates as a bandpass filter with a bandwidth of 100 kHz, using the same low cut off frequency. Sketch the modified circuit schematic.
Added by Ramon J.
Close
Step 1
Let's choose a resistor value of 20 kΩ. ii) High frequency gain of -50: We can achieve this by using a feedback resistor in the circuit. Let's choose a resistor value of 1 kΩ. iii) Cut off frequency of 25 kHz: We can achieve this by using a capacitor in the Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 98 other Physics 102 Electricity and Magnetism educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
A block diagram of a system consisting of a sinusoidal voltage source, an $R L C$ series bandpass filter, and a load is shown in Fig. P14.28. The internal impedance of the sinusoidal source is $36+j 0 \Omega$ and the impedance of the load is $320+j 0 \Omega$ . The $R L C$ series bandpass filter has a 5 nF capacitor, a center frequency of $250 \mathrm{krad} / \mathrm{s}$, and a quality factor of 10 a) Draw a circuit diagram of the system. b) Specify the numerical values of $L$ and $R$ for the filter section of the system. c) What is the quality factor of the interconnected system? d) What is the bandwidth (in hertz) of the interconnected system?
Prem B.
Design an op amp-based low pass filter with a cut off frequency of $500 \mathrm{Hz}$ and a passband gain of 1 using a $50 \mathrm{nF}$ capacitor. a) Draw your circuit, labeling the component values and output voltage. b) If the value of the feedback resistor in the filler is changed but the value of the resistor in the forward path is unchanged, what characteristic of the filter is changed?
Pranay S.
For the common-emitter amplifier of Fig. P9.14, neglect $r_{o}$ and assume the current source to be ideal (a) Derive an expression for the midband gain. (b) Derive expressions for the break frequencies caused by $C_{E}$ and $C_{C}$ (c) Give an expression for the amplifier voltage gain $A(s)$ (d) For $R_{\mathrm{sig}}=R_{c}=R_{L}=10 \mathrm{k} \Omega, \beta=100,$ and $I=1 \mathrm{mA},$ find the value of the midband gain. (e) Select values for $C_{E}$ and $C_{C}$ to place the two break frequencies a decade apart and to obtain a lower 3 -dB frequency of $100 \mathrm{Hz}$ while minimizing the total capacitance. (f) Sketch a Bode plot for the gain magnitude, and estimate the frequency at which the gain becomes unity. $(\mathrm{g})$ Find the phase shift at $100 \mathrm{Hz}$
Manish J.
Recommended Textbooks
University Physics with Modern Physics
Physics: Principles with Applications
Fundamentals of Physics
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD