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Anonymous users2024-02-06Calculate the Bird Hall amplifierFormula: u o = f ( u i 2 u i 1 ) i = 2 .
It can amplify weak signals, and can also be used as an inverting and voltage follower.
Addition and subtraction of electrical signals can be performed.
Uses: Widely used in the electronics industry, connected to appropriate feedback networks, can be used as precision AC and DC amplifiers, active filters, oscillators and voltage comparators.
The op amp input potential is usually higher than a certain value for the negative supply and a certain value for the positive supply. Op amps are specially designed to be amperated to allow the input potential to vary from negative to positive, even slightly above the positive supply or slightly below the negative supply. This op amp is called a rail-to-rail input op amp.
The output signal of the operational amplifier is proportional to the signal voltage difference between the two input terminals, in the audio segment: output voltage = A0 (E1-E2), wherein, A0 is the low-frequency open-loop gain of the op amp (such as 100dB, that is, 100000 times), E1 is the input signal voltage of the inverting terminal, and E2 is the input signal voltage of the inverting terminal.
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Anonymous users2024-02-05The actual op amp has a very large open-loop voltage gain and can be approximated as a= and e=0. At this point, the finite gain op amp model can be further simplified to the ideal op amp model.
Output impedance approaching zero (zout=0): The output of an ideal op amp is a perfect voltage source, and the output voltage of the amplifier is always a certain value, i.e., the output impedance is zero, regardless of the current flowing to the amplifier load.
An op amp is a functionally named circuit unit that can be implemented by discrete devices or in semiconductor chips. With the development of semiconductor technology, most of the op amps exist in the form of monolithic chips. There are many types of op amps, which are widely used in the electronics industry.
Extended information: Generally speaking, the op amp can be simply regarded as a high-gain direct coupled voltage amplifier unit with a signal output port (out) and two high-impedance inputs of non-inverting and inverting, so the op amp can be used to make in-phase, inverting and differential amplifiers.
There are two types of power supply modes: dual power supply and single power supply. In the case of dual-supply op amps, the output can vary on both sides of the zero voltage, and the output can also be set to zero when the differential input voltage is zero. In a single-supply op amp, the output varies within a certain range between the power supply and ground.
The input potential of the op amp is usually required to be higher than a certain value for the negative supply and a certain value for the positive supply. The op amp is specially designed to allow the input potential to vary from negative to positive, even slightly above the positive supply or slightly below the negative supply. This op amp is called a rail-to-rail input op amp.
An introduction to operational amplifiers.
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