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current in audio amplifier - Electrical Engineering Stack ...
https://electronics.stackexchange.com/questions/49699/current-in-audio-amplifier#:~:text=Specify%20the%20input%20voltage%20you%20need%20to%20give,the%20input%20current%20%28in%20this%20case%2C%200.1ma%20rms%29.
current in audio amplifier - Electrical Engineering Stack ...
https://electronics.stackexchange.com/questions/49699/current-in-audio-amplifier
Specify the input voltage you need to give full output (a typical value is 1V rms) - this lets you work out the voltage gain of the amp, but that's another matter. Also specify the input impedance (10kilohms is a typical value). Divide, and you have the input current (in this case, 0.1ma rms).
An Introduction to Current Feedback Amplifiers for Audio
https://www.ovationhifidelity.com/wp-content/uploads/2019/05/An-Introduction-to-CFA-Amplifiers-for-Audio.pdf
An Introduction to Current Feedback Amplifiers for Audio www.ovationhifidelity.com Page 2 Test/Pointer VFA CFA Test 1 Peak input current to TIS = LTP tail current Peak input current to TIS/TAS = Vo peak /R feedback Test 2 Closed loop -3 dB bandwidth constrained by constant gain bandwidth product Closed loop -3 dB bandwidth independent
Basics of Audio Amplifier - 1/9
https://www.engineersgarage.com/basics-of-audio-amplifier-1-9/
1) Gain – Gain is a measure of the capability of any system to increase signal power or amplitude. The gain of an amplifier circuit is expressed as the ratio of the output voltage to the input voltage (voltage gain), or ratio of the output current to the input current (current gain) or ratio of the output power to the input power (power gain).
Audio Amplifier Circuit
https://web.ece.ucsb.edu/Faculty/rodwell/Classes/ece2c/labs/Lab%201a%20-%202C%202007.pdf
speakers have a low impedance, typically 8-Ohm. Even for a low-power 0.5W audio amplifier, PIR 2 /2 requires that the amplifier must be able to source a peak AC current of around 350 mA with an 8-Ohm load. This is a lot more than a typical op-amp is designed to provide. For example, the LM358 and LF353 (two op-amps used in this lab) can source
Elliott Sound Products - Audio Power Amplifier Design ...
https://sound-au.com/amp_design.htm
Input Current The input current of the first stage determines the input impedance of the amplifier. Using the above figures, with a collector current of 480µA, the base current will be 4.8µA for input devices with a gain of 100. If maximum power is developed with an input voltage of 1V, then the impedance is 208k ( R = V / I ).
Electronics I Audio Amplifier Design Project
https://jahschwa.com/file/school/audio-amp.pdf
Input Stage The input stage to this amplifier has 3 main parts: a differential BJT pair, a current mirror BJT pair, and a constant current source. Connected to the bases of the BJTs in the differential pair are the input signal and the negative feedback coming from the output. The differential pair generates an error signal that drives the output.
Current Source Amplifiers and Sensitive / Full-Range Drivers
https://www.passdiy.com/pdf/cs-amps-speakers.pdf
We built an audio current source that delivered 1 amp of AC current per input volt to a maximum of 10 amps. This kind of amplifier is known as a power transconductance amplifier. Such circuits are fairly common in small chips which don’t generate the high current necessary to drive a …
Understanding Op Amp Noise in Audio Circuits
https://www.ti.com/lit/pdf/sboa345
As previously mentioned, amplifiers have a current noise contribution shown as I. N. in Figure 2-2. Current noise is represented as a noise source between the inverting and non-inverting inputs. Input current noise density (i. n) is most commonly shown in the amplifier data sheet in units of. For current noise calculations, it is often necessary
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