![]() ![]() ![]() The voltage, current & resistance can be calculated with the help of ohms law (I = V/R). So here, the output impedance will be extremely low. Because of the high input impedance, an extremely low current supply will be drawn from the source of input and provides high output current to the load. The op-amp’s input impedance will be extremely high up to 1MΩ once we implement it within the circuit. The bias pins are simply connected to a battery whereas the output is simply connected to the load resistor. The working of this circuit is, whenever the Input signal is applied to pin3 & Pin2 is connected with Pin 6 (output) to make negative feedback. Circuit WorkingĬonnect the circuit as per the circuit shown above. The required components to design this circuit are LM741 IC, 10KΩ variable resistor, 1KΩ resistor 1KΩ, 9V battery, and the source of the input signal from a function generator. This IC can work as a comparator, integrator, multivibrator, differentiator, active filter, etc. This 741 IC operates by using a battery power supply or dual power supply. This IC includes two input terminals Inverting like Pin 2 & Non-Inverting like Pin 3 & one output terminal like Pin 6. This 741 IC is a dual inline packed (DIP) 8-Pin based IC which provides high gain output. In this circuit, the 741 IC is used as an op-amp. We know that the voltage follower op-amp circuit gives an output similar to the input signal. The voltage follower circuit using 741 IC is mainly designed to provide unit gain output. One is for isolating purposes & another purpose is for buffering the o/p voltage from an electronic or electrical circuit to obtain the preferred voltage to the load connected. The main reason to implement the voltage follower in the voltage divider circuit is mainly for two purposes. If the voltage follower is not there within the voltage divider circuit, then it will not work because of the lack of enough voltage across the connected load. We have observed how the operational amplifier functions as a buffer to get the preferred voltage to the load connected. Therefore, this 5Volts voltage drop will be across the top, and bottom of 10KΩ resistance & the 100Ω load resistance. = 10V x 10 kilo ohm/10 kilo ohm + 10 kilo ohm = 5V. By using the voltage divider formula, we can prove it as follows. We know that the voltage divider circuit includes two similar resistances and provides accurately half of the voltage. The equivalent parallel resistance = 10-kilo ohm X 100 mega ohm/10-kilo ohm + 100 mega ohm The main characteristic of this circuit is very high input impedance so it can be used in different kinds of circuits that need isolation between the input & output signal. ![]() Thus this op-amp does not strengthen the input signal, so the voltage gain of this is ‘1’. What is a Voltage Follower?Ī voltage follower is an op-amp circuit where the output voltage of this circuit is equivalent to the input voltage which means the output voltage follows the input voltage. ![]() This article discusses an overview of a voltage follower – circuit & its working. In a voltage follower op-amp circuit, the output voltage is equivalent to the input voltage so, it has unity gain & does not strengthen the incoming signal. Here voltage follower is mainly used for isolating the signal as well as improving load capacity and this is also known as a unity-gain amplifier, isolation amplifier, or buffer amplifier. One of the forms is the voltage follower. The op-amp is used to amplify the weak signal and it can be made simply into various forms based on the requirements of the circuit. The operational amplifier or op-amp is a versatile & very efficient device. ![]()
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