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What else can I help you with?
Why is negative feedback used in high gain amplifier?
A: Well for one thing if it is positive feedback the amplifier will saturate to one one side of the power buss or the other. An operational amplifier open loop gain can be 90Db which a tremendous gain so some negative feedback is necessary to reduce the gain and make the amplifier behave in the linear region for amplification
If bandwidth of amplifier reduced then thermal noise in amplifier?
thermal noise willbe reduce
Why to have a filter before and after a low noise amplifier?
To cut off unwanted frequencies, unwanted frequencies are called noise.
What type of antenna is used in cellphone for FM?
LNA - Low Noise Amplifier
What amplifier circuit is typically used as the input stage for an operational amplifier?
Differential amplifier ANSWER: A differential amplifier is an op amp. If any amplification is required a preamplifier is used mainly to cut the white noise and improve the input impedance
In a feedback amplifier positive feedback produces an output that is?
In a feedback amplifier, positive feedback produces an output that is in-phase with the input signal. This can lead to instability and oscillation in the amplifier circuit. Positive feedback can increase the gain but at the risk of introducing noise and distortion.
Why positive feedback is not used in amplifier?
positive feedback makes regeneration of the input signal,which creates more noise. ANSWER: To feedback positive voltage will do nothing for noise or any other reason but force the amplifier to saturate to the hi rial or the low rail of the power supply
Why Positive Feedback can't use in Amplifier?
because +feedback amplify noise also.it amplify the noise to input ratio by[1/(1-G.H)]. WHERE g=open loop gain H=feedback gain
Why is negative feedback used in high gain amplifier?
A: Well for one thing if it is positive feedback the amplifier will saturate to one one side of the power buss or the other. An operational amplifier open loop gain can be 90Db which a tremendous gain so some negative feedback is necessary to reduce the gain and make the amplifier behave in the linear region for amplification
If bandwidth of amplifier reduced then thermal noise in amplifier?
thermal noise willbe reduce
What causes squeal or noise in a sound system?
A loud "squeal" or "screech" - also known as "feedback noise" - is usually only generated if there is an audio input device for an amplifier, for example a microphone, that is being used too close to an audio output device for the same amplifier, for example a speaker.
Effect of feedback on stability and sensitivity?
Feedback can cause a lack of stability. However, negative feedback can actually reduce distortion, noise, and sensitivity to the noise.
How do you minimize feedback on tons of effects plugged into an amp?
Get a noise gate. or turn down the volume level on your distortion. or turn down the regeneration on your delay or stand farther away from your amp or turn your amp down. feedback is because your guitar pickup is looping the sound coming out of the amplifier back through all your effects again then through the amplifier then back through your pickups and so on
What is the theory of voltage series feedback amplifier?
In a Voltage Shunt feedback Amplifier, the feedback signal voltage is given to base of transistor in shunt through a feedback resistor.This Shunt connection decreases the input input impedance and voltage feedback decreases the output impedance. In this amplifier input is current and output is voltage. Thus Transresistance is stabilized.Input and Output impedances are reduced by a factor of 'D'(desensitivity factor). Advantages: 1)Gain independent of device parameters. 2)Bandwidth increases. 3)Noise and non-Linear distortion decrease. 4)Prevents Loading effect. 5)Acts as good source for the next stage.
What causes the ear-piercing sound of a guitar screeching and how can it be minimized or controlled?
The ear-piercing sound of a guitar screeching is caused by feedback, which occurs when the sound from the guitar's amplifier is picked up by the guitar's pickups and re-amplified. To minimize or control this screeching, you can adjust the positioning of the guitar and amplifier, use a noise gate pedal, or reduce the volume and gain settings on the amplifier.
How can I effectively manage and control guitar feedback during live performances?
To effectively manage and control guitar feedback during live performances, you can try the following techniques: Position yourself strategically in relation to the speakers and monitor speakers to minimize feedback. Use a noise gate pedal to cut off unwanted noise when you're not playing. Adjust the volume and tone settings on your guitar and amplifier to reduce the likelihood of feedback. Experiment with different types of pickups and microphones to find the best combination for your setup. Consider using feedback suppressor pedals or software to help control feedback in real-time.
Which device amplifies the incoming signal and noise?
Amplifier repeater
