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It takes the difference between of two input and amplify by the open loop gain of the amplifier or closed loop gain of the amplifier. It is very hard to control open loop gain of 100 Db so it very seldom used
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∙ 14y ago
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What is difference between ac and DC amplifier?
AC amplifiers are used to amplify AC signals and use components that handle large voltage values. DC amplifiers are used to amplify DC signals which use small powered electronic devices.
What are the two basic configurations in operational amplifier?
opamp is a device used to amplify ac as well as DC input signals. It is called as operational amp becoz it is used to perform all mathematical operations. Symbol of opamp indicates the direction of current.
DC amplifier amplifies what?
A: Amplify DC a1 volt can be amplify to 10volts for example if need be
Is there electrical equipment can sum 3 dc signals to get 1 output signal?
An operational amplifier can sum an arbitrary number of signals and produce a single output signal.
What type of signal to amplify by using differential amplifier?
ac and dc
Can you amplify DC voltages?
Yes, certainly - an operational amplifier circuit (see e.g. Wikipedia) will do this. For instance, a non-inverting amplifier circuit with a gain of 10 will give 1.0V output for 100mV input, 2.0V for 200mV, and so on (limited by the supply voltage of the amplifier). Physical sensors such as thermocouples or strain gauges often need DC amplification to make their outputs easier to measure.
What is wide band amplifier and detailed explanation?
A: All AC amplifiers will amplify a band of frequency lets say from DC TO 1 mega Hz that will be the band of frequency that this particular amplifier can amplify. A wide band amplifier is an amplifier that surpass this band to even higher frequency to lets say 500 mega Hz that will surely qualify it as a WIDE band amplifier. It is a name to describe an amplifier that has capabilities to reach higher frequency as opposed to a general op amp
Why the common mode signal should be rejected in differential amplifier?
because of the coupling between the two transister and absence of capacitance it can amplify both dc and ac
Can an ac amplifier amplify the DC signals?
An amplifier generally amplifies an AC waveform (such as sound), and is powered by a DC source. The majority of the power at the output is then coming from a DC source (the power supply in a power amplifier will convert the 50/60Hz AC power in to DC for the amplifier circuitry). So you can make the argument the above (question) is a true statement. But an amplifier wouldn't be used to convert from DC to AC power (in general).
What is DC coupled amplifier?
A: DC couple amplifiers refers to stages of amplifiers where is the biasing is direct without adding capacitors to remove the DC component from amplifier to amplifier
How do you amplify DC voltage?
Either electronically through a DC Bus similar to what is used in a Variable Frequency Drive, or through a Voltage doubler where resistors in parallel with a series r off of the p resistor acts as a voltage multiplier. Search for Voltage divider, or DC amplifier.
What happens if amplifier is connected t a DC voltage?
It will depend on the which kind of amplifier it is ,if it is made from Op amp(Non inverting Amplifier) it will simply amplify(multiply)the signal with a factor depend on the configuration of circuit which is also known as gain of the circuit.For instance if gain is 2(dimension less) and input DC voltage is 2 Volt output would be 4 Volts. and if it an Audio or RC coupled amplifier output would be zero Hence i Wrote in the starting "It will depend on the which kind of amplifier it is"
