For the oscillator circult shown below, C-10 pF and C 150 pF and L-1pH a) Name the type of oscillator b) Should the feedback circuit provide 180° phase shift? Explain why. c) Calculate the frequency of oscillation. d) If the amplifier circuit is biased to provide a gain of 10, will the circuit oscillate? Justify your answer. RFC to0 p 多Res R

For the oscillator circult shown below, C-10 pF and C 150 pF and L-1pH a) Name the type of oscillator b) Should the feedback circuit provide 180° phase shift? Explain why. c) Calculate the frequency of oscillation. d) If the amplifier circuit is biased to provide a gain of 10, will the circuit oscillate? Justify your answer. RFC to0 p 多Res R

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Figure 3 shows a Hartley oscillator. Assume that the op-amp employed in the figure is an ideal op-amp, and R1= 20 kΩ, R2 = 60 kΩ, L1=10 mH. b) State the Barkhausen criterion for sustained oscillation.c) Explain briefly how the phase shift requirement for sustained oscillation ismet in the circuit of Figure 3.d) The feedback ratio and oscillation frequency of Figure 3 are givenrespectively by, B = -L2/L1 and w0 = 1 / sqrt(L1 +L2)C Determine the values of C and L2 in order for the circuit to oscillate at a frequency of 200 Hz.
a) Two feedback configurations are shown in Figures Q1.a(i) and Q1.a(ii). Derive the closed-loop gain Af in each case. V₁. V₁. A1 B1 Figure Q1.a(i) A₁ B₁ Figure Q1.a(ii) A₂ A₂ B₂ ܘܢ -V
The circuit uses current- (or shunt-) feedback bias. The Si transistor has ICEO = 0, VCEsat =0, and B= 100. If RC = 2k and VCC =12V, size RF for ideal maximum symmetrical swing (that is, location of the quiescent point such that VCEQ =VCC/2). +Vcc Rc Cc lic VL Cc R. -20 "ca. V -10 -12 14 -16
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1. The negative feedback circuits are of types (d) Four (a)One (b) Two (c) Three 2. A device with direct current coupled, high gain electronic voltage type amplifier with one output and differential input is called (a)Rectifier (b) Amplifier (c) Transformer (d) Op-amp 3. Op-Amp with positive input type configuration +V or V is called (a)Non-inverting type input (b)Inverting type input (c)Non-inverting type output (d) Inverting type output 4. Op-Amp has (a) Single (b) Similar (c)Multiple (d)Differential 5. Write the formula for closed-loop voltage gain of inverting amplifier with feedback using open-loop voltage gain and gain of the feedback circuit. (c)AF=-B/(1+AB) (d)None of the mentioned (a)AF= A/(1+AB) (b)AF= -A/(1+AB) 6. Voltage shunt feedback amplifiers are also called as (a)Non-inverting amplifier with feedback (b)Non-inverting amplifier without feedback (d) Inverting amplifier without feedback (c)Inverting amplifier with feedback 7. The type of active filter is: (a) active low…
Please help: Design an RC phase shift oscillator to generate sinusoidal waveform of frequency 500Hz. Plot frequency response of the RC feedback path and show that the phase shift is 180deg and gain is ~1/29 at the frequency of oscillation. Modify the circuit to generate a sinusoidal waveform of frequency 5KHz.
77.One condition for positive feedback is that the phase shift around the feedback loop must be _______°. 76.In order to start up, a feedback oscillator requires A. positive feedback greater than 1. B. unity feedback equal to 1. C. no feedback. D. negative feedback less than 1. 75.A circuit that can change the frequency of oscillation with an application of a dc voltage is sometimes called A. an astable multivibrator. B. a voltage-controlled oscillator. C. a crystal oscillator D. a Hartley oscillator 74.Which of the following is required for oscillation? A. The phase shift around the feedback network must be 180º B. None of the above C. ßA > 1 D. Both ßA > 1 and the phase shift around the feedback network must be 180º.
Fill in the blanks in the following sentences: 2 The value of the attenuation of the feedback circuit in the phase shifi oscillator is...................................
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The hide word is “ obtain “