What type of feedback aids an input signal?

What type of feedback aids an input signal?
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1 Answer

Answer :

Regenerative or positive
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Related questions

In the inverting configuration, the input signal is applied to the (a) (inverting, noninverting) input and the feedback signal is applied to the (b) (inverting, noninverting) input.

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Last Answer : a. Inverting. b. Inverting.

select the correct response from the choices given in the parentheses. Q-20. In a closed-loop configuration the output signal is determined by (the input signal, the feedback signal, both).

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Which terminology deals with the excitation or stimulus applied to the system from an external source for the generation of an output? a. Input signal b. Output signal c. Error signal d. Feedback signal

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Last Answer : Ans: A

In the illustration, the signal from the device connected to terminals 18 and 19 is __________. EL-0046 A. prime mover speed feedback B. loss of control alarm when comparing with the input signal from the resistor at the top of the speed sensing circuit card C. hall effect current to detect slip between the prime mover and the alternator D. to shut down the prime mover if overspeeding

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Last Answer : Negative feedback amplifier has a signal corrupted by noise as its input. The amplifier will Reduce the noise

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Description : How can a series-positive limiter be modified to limit unwanted negative portions of the input signal?

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What components form the input-signal-developing impedance for the amplifier?

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. When you select the time base to display a signal, should the time base be the same, higher, or lower than the input signal?

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In a circuit such as that shown in figure 3-16, if R1 has a value of 50 ohms and R2 has a value of 250 ohms and the input signal has a value of +10 millivolts, what is the value of the output signal?

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Last Answer : 60 millivolts.

In a circuit such as that shown in figure 3-15, if R1 has a value of 100 ohms and R2 has a value of 1 kilohm and the input signal is at a value of + 5 millivolts, what is the value of the output signal?

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Last Answer : 50 millivolts.

In the inverting configuration when the noninverting input is grounded, the inverting input is at (signal, virtual) ground

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Last Answer : Virtual.

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If the input signals are 180 degrees out of phase with each other and a combined output is taken between the two output terminals, what will the amplitude of the combined output signal be?

Description : If If the input signals are 180 degrees out of phase with each other and a combined output is taken between the two output terminals, what will the amplitude of the combined output signal be?

Last Answer : 200 millivolts.

If the single-input, differential-output, differential amplifier has an output signal taken between the two output terminals, what will the peak-to-peak amplitude of this combined output be?

Description : If the single-input, differential-output, differential amplifier has an output signal taken between the two output terminals, what will the peak-to-peak amplitude of this combined output be?

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If the two input signals to a difference amplifier are equal in amplitude but neither in phase nor 180 degrees out of phase, what will the output signal be?

Description : If the two input signals to a difference amplifier are equal in amplitude but neither in phase nor 180 degrees out of phase, what will the output signal be?

Last Answer : . A different shape than the input signals but larger in amplitude.

If only one input signal is used with a difference amplifier, what will the output signal be?

Description : If only one input signal is used with a difference amplifier, what will the output signal be?

Last Answer : Equal in shape and frequency to the input signal; larger in amplitude than the input signal; half as large in amplitude as when two input signals were used that were 180 degrees out of phase.

If the two input signals to a difference amplifier are equal in amplitude and 180 degrees out of phase, what will the output signal be?

Description : If the two input signals to a difference amplifier are equal in amplitude and 180 degrees out of phase, what will the output signal be?

Last Answer : Equal in shape and frequency to each input signal and larger in amplitude by two times than

. If the two input signals of a difference amplifier are in phase and equal in amplitude, what will the output signal be?

Description : . If the two input signals of a difference amplifier are in phase and equal in amplitude, what will the output signal be?

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Does a rectifier tube conduct on the positive or negative alternation of the input signal?

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The pump signal frequency must be of what value when compared to the input signal of a simple parametric amplifier?

Description : The pump signal frequency must be of what value when compared to the input signal of a simple parametric amplifier?

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When measuring harmonic distortion, you set the signal generator to input a 15-kHz test signal. To what frequency should you set the wave analyzer?

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Two tape recorders have signal-to-noise ratios (SNRs) of 25-dB RMS and 35-dB RMS respectively. Which of the SNRs can record and reproduce the widest range of input signals and why?

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Last Answer : 35-dB RMS because the highest SNR can always record and reproduce the widest range of input signals.

What are three advantages of adding an ac bias voltage to the input signal instead of adding a fixed dc bias voltage?

Description : What are three advantages of adding an ac bias voltage to the input signal instead of adding a fixed dc bias voltage?

Last Answer : a. Reproduces a stronger output signal. b. Greatly improves the SNR. c. Greatly reduces the natural tape hiss.

Why does adding dc vice ac bias voltage to the input signal result in a poor signal-to-noise ratio (SNR)?

Description : Why does adding dc vice ac bias voltage to the input signal result in a poor signal-to-noise ratio (SNR)?

Last Answer : With dc bias, the SNR is poor because only a small portion of the magnetism curve is straight enough to use, thus the output signal is weak compared with the natural tape hiss.

How does dc bias added to the input signal correct the distortion in the output signal?

Description : How does dc bias added to the input signal correct the distortion in the output signal?

Last Answer : The dc bias moves the input signal away from the step in the magnetism curve. This prevents the input signal from crossing the zero-point of the magnetism curve.

rid-leak biasing in effect rectifies the input ac signal. What feature

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When a circuit uses cathode biasing, the input signal can cause varia

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Last Answer : Through the use of a bypass capacitor

Which component in figure 3-7 develops the af signal at the input?

Description : Which component in figure 3-7 develops the af signal at the input?

Last Answer : R1.

If the output of a circuit needs to be a complete representation of one-half of the input signal, what class of operation is indicated?

Description : If the output of a circuit needs to be a complete representation of one-half of the input signal, what class of operation is indicated?

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Does an amplifier actually change an input signal? Why or why not?

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What type of feedback is usually caused by the base-to collector interelectrode capacitance?

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What type of feedback is usually caused by interelectrode capacitance?

Description : What type of feedback is usually caused by interelectrode capacitance?

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A two-cavity klystron without a feedback path will operate as what type of circuit?

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In a typical velocity servo block diagram what device is placed in the feedback loop that is not present in the position servo?

Description : In a typical velocity servo block diagram what device is placed in the feedback loop that is not present in the position servo?

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Which oscillator uses tapped capacitors for feedback?

Description : Which oscillator uses tapped capacitors for feedback?

Last Answer : Colpitts.

Which oscillator uses a tapped inductor for feedback?

Description : Which oscillator uses a tapped inductor for feedback?

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Which oscillator uses a tickler coil for feedback?

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What are the two methods used for feedback coupling?

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If Relay #5 changed contact position grounding the 'auto' input to the 'pitch controller module', pitch control would be effected by the _________________. EL-0095 A. pitch feedback potentiometer B. Engine room thrust split potentiometer C. Engine room thrust lever only D. Bridge thrust lever only

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Last Answer : Answer: B

Basic operating characteristics of the operational amplifier such as gain and stability are the function of its _____________. A. differential input stage B. power output stage C. feedback circuit D. supply voltages

Description : Basic operating characteristics of the operational amplifier such as gain and stability are the function of its _____________. A. differential input stage B. power output stage C. feedback circuit D. supply voltages

Last Answer : Answer: C

The transfer function of a system is 10/(1+s) when operating as a unity feedback system, the steady state error to a step input will be a) 0 b) 1/11 c) 10 d) Infinity

Description : The transfer function of a system is 10/(1+s) when operating as a unity feedback system, the steady state error to a step input will be a) 0 b) 1/11 c) 10 d) Infinity

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Comment on the effect of negative feedback on the gain, input and output resistance of the feedback amplifiers.Describe the gain bandwidth product term used in this context and its importance.

Description : Comment on the effect of negative feedback on the gain, input and output resistance of the feedback amplifiers.Describe the gain bandwidth product term used in this context and its importance.

Last Answer : Effect of negative feedback: 1. Gain decreases with negative feedback. 2. Input resistance increases with negative feedback. 3. Output resistance decreases with negative feedback. Explanation ... feedback bandwidth increases which means it is stable output on more range of frequency.

An amplifier without feedback has a voltage gain of 50, input resistance 1kΩ and output resistance of 2.5kΩ.

Description : An amplifier without feedback has a voltage gain of 50, input resistance 1kΩ and output resistance of 2.5kΩ. The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 would be: (1) 1/11 kΩ (2) 1/5 kΩ (3) 5 kΩ (4) 11 kΩ

Last Answer : An amplifier without feedback has a voltage gain of 50, input resistance 1kΩ and output resistance of 2.5kΩ. The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 would be: 1/11 kΩ

A negative feedback loop returning a voltage to the input raised the input impedance and making the circuit a better

Description : A negative feedback loop returning a voltage to the input raised the input impedance and making the circuit a better

Last Answer : A negative feedback loop returning a voltage to the input raised the input impedance and making the circuit a better voltage sensor

_________is the reference input minus the primary feedback.

Description : _________is the reference input minus the primary feedback.

Last Answer : Actuating signal is the reference input minus the primary feedback.