An amplifier has a bandwidth of 500 kHz and voltage gain of 100. What is the amount of negative feedback if the bandwidth is extended to 5 MHz?
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- Calculate 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.Find the gain of non inverting amplifier if it has input voltage is 5V, input resistance of 20 ohm and feedback resistance of 40 ohm. NOTE : KINDLY ELABORATE BRIEFLYThe gain of an amplifier without feedback is 50 whereas with negative voltage feedback, it falls to 25. If due to ageing, the amplifier gain falls to 40, find the percentage reduction in stage gain (i) without feedback and (ii) with negative feedback.
- If a signal voltage of 30mV is applied to inverting amplifier, find output voltage and phase relationship with input voltage if it has input resistance of 25 ohm and feedback resistance of 50 ohm. NOTE : KINDLY ELABORATE BRIEFLYA certain op-amp is used in a feedback configuration having a gain of 20 and a bandwidth of 500 kHz. a)If the external resistor values are changed to increase the gain to 40, what is the new bandwidth? The new bandwidth is 250khz What is the unity-gain bandwidth of the op-amp ??Suppose the output signal voltage from the amplifier is 35 times the input signal voltage. If the imput and output impedance are both pure resistances of the same value, what is the gain
- If the input voltage is 10V, input and feedback resistance are 10 ohm and 10 kohm respectively find its output voltage if it is working on inverting amplifier. NOTE : KINDLY ELABORATE BRIEFLY(a) Explain the two preconditions that must be achieved for an amplifier to oscillate. (b) What will happen if the criteria in (a) is met i.e. k * v =1 but the feedback is not 0 degrees? (c) What happens to the amplifier if k * v >1 and k * v < 1?An amplifier has an input of 0.2W. it has an internal gain of -500 with a 10% distortion. If negative feedback is added with ß = 0.05, determine the following: a. Percent reduction in distortion b. Reduction in output power due to feedback expressed in %
- The gain of an amplifier without feedback is 2000. When negative feedback is applied, gain becomes 97. What is the value of the feedback factor? Round to 2 decimal places.Find out the gain of inverting amplifier if it is performing on 12 V supply, it has input resistance of 20 ohm and feedback resistance of 50 ohm respectively. NOTE : KINDLY ELABORATE BRIEFLYFind the desired values below in the feedback amplifier circuit in the figure. a) Find the no-load voltage gain in the amplifier circuit when the Rf resistor is open circuit. b) Voltage and current in amplifier circuit when Rf resistor is open circuit and RL resistor is present Find your earnings. c) When the Rf feedback resistor is connected, the Rf value that makes the feedback current gain Ai/3 find it. Indicate the assumptions you take in your transactions.