If the voltage gain of the amplifier section of a certain oscillator is equal to 100, what is the required attenuation of the feedback?
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If the voltage gain of the amplifier section of a certain oscillator is equal to 100, what is the required attenuation of the feedback?
A. 1
B. 0.1
C. 50
D. 0.99
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Solved in 2 steps with 2 images
- 1. determine the oscillator frequency 2. If R1, R2, and R3 are changed to 8.2 kΩ while retaining the capacitors, what value must Rf be for oscillation? 3. Calculate the voltage gain of the amplifier section 4. Determine the attenuation of the feedback section 5. What value of Rf necessary for the circuit to operate as an oscillator?Derive the formula for calculating the equivalent input noise resistance of a three-stage amplifier in cascade.A differential amplifier has a common-mode gain (Ac) of 0.2 and a common-mode rejection ratio (CMRR) of 5500. What would the output voltage be if the single-ended input voltage was 10 mV?
- Ques1: Draw the circuit diagram of a two stage RC coupled amplifier. Explain the importance of eachcomponent. Draw and explain its frequency response.Question. A differential amplifier has a common-mode gain of 0.2 and a common-mode rejection ratio (CMRR) of 3500. What would the output voltage be if the single-ended input voltage was 10 mV?1. Give the formula for the frequency of oscillations in the Wein Bridge Oscillator circuit? 2. What is the condition for the Wien Bridge oscillator to generate oscillations? 3. What is the total phase shift provided by the Wein Bridge oscillator? 4. What is the function of the lead-lag network in the Wein Bridge oscillator? 5. Which type of feedback is used in the Wein Bridge oscillator 6. What is the gain of the Wein Bridge oscillator? 7. What are the applications of the Wein Bridge oscillator? 8. What is the condition for generating oscillations? 9. What is the difference between damped oscillations undamped oscillations? 10. Wein Bridge oscillator is either LC or RC oscillator. 11. What are the drawbacks in using Wein Bridge Oscillators?
- Consider the circuit. The transistor has a parameter β that varies between 50 and 200. The operation of the circuit and the electrical variables at the end points must be known. end points. Calculate the following for β = 50 and β = 200. a) lE, VE and VB (DC analysis). b) The input resistance Rin (small signal analysis). c) Voltage gain V0/ Vsig (Small Signal AnalysisCalculate the sensitivity of the of the feedback amplifier to changes in forward-amplifier gain, given that A = 833 and B = 0.0018. Calculate the answer to three significant figures.Amplifier circuit is show below has a single ac input and one ac output. Assuming 2N2222 transistor: Construct the T-model of the transistor with all parameters labelled and evaluated. Assume room temperature. Draw a complete small signal circuit model, then find the voltage gain. Explain two characteristics of this amplifier. Calculate the current gain, the input resistance, and the output resistance.
- The common-mode gain of the front-end circuit for the instrumentation amplifier is equal to ACM= 1 V/V. If the instrumentation amplifier is not reducing the common-mode signal, then why is the CMRR of an instrumentation amplifier higher than a differential amplifier, in general?4. What is the function of the lead-lag network in the Wein Bridge oscillator? 5. Which type of feedback is used in the Wein Bridge oscillator 6. What is the gain of the Wein Bridge oscillator? 7. What are the applications of the Wein Bridge oscillator? 8. What is the condition for generating oscillations? 9. What is the difference between damped oscillations undamped oscillations? 10. Wein Bridge oscillator is either LC or RC oscillator. 11. What are the drawbacks in using Wein Bridge Oscillators?For an operation amplifier, the differential gain and the common mode gain are 105 and 102 respectively. What will be the common mode rejection ratio?