A zero crossing detector is a comparator, in which reference voltage is zero volt. It is also called as sine to square wave convertor. We have discussed Comparator using Op-Amp in our previous article. A comparator is an electronic circuit, which compares the two inputs that are applied to it and produces an output. The output value […]
A comparator is an electronic circuit, which compares the two inputs that are applied to it and produces an output. The output value of the comparator indicates which of the inputs is greater or lesser. Comparator using op-amp is discussed in the following section. Op-Amp as Comparator Comparator is nothing but an open loop op-amp, with two
Differentiator is a circuit in which the output voltage is proportional to differentiation of input voltage. Differentiator using Op-amp consist of Op-amp, resistor and capacitor. In this article, differentiators are discussed in details. Differentiators can be classified into two categories as Passive differentiator Active differentiator RC Passive Differentiator The passive differentiator uses passive circuit elements
Integrator is a circuit in which the output voltage is proportional to integration of input voltage. Integrator using Op-amp consist of Op-amp, resistor and capacitor. In this article, integrators are discussed in details. The integrators are broadly classified into two categories as Passive integrator Active integrator Passive Integrator (R-C Integrator) The passive integrator consists of
A difference amplifier is a circuit in which the output voltage is proportional to the difference between the input voltages. Difference amplifier using op-amp can be obtained by connecting voltages to both input terminals of op-amp. Difference amplifier is also known as Differential amplifier or Subtractor (with few changes). Circuit Diagram In difference amplifier one
Difference Amplifier Using Op-Amp | Subtractor Using Op-Amp Read More »
Summing amplifiers or adders are the amplifier circuits which can add more than one input signal. It is possible to apply more than one input signal to an inverting or non-inverting terminal of op-amp. The summing amplifier then add all these input signals to produce their addition at the output. Depending on the polarity of
Summing Amplifier Using Op-Amp | Adder Using Op-Amp Read More »
In Op-amps the closed loop configuration is widely used. The closed loop op-amp circuit may be an inverting or a non-inverting circuit. While analysing these configurations the virtual short and virtual ground concepts are used. According to dictionary the word ‘Virtual’ means “almost a particular thing or quality” or “created by computer technology and appearing
Closed Loop Configuration When a part of output is fed back (given) to the input it is called closed loop configuration. It means that some kind of feedback is introduced in the circuit. In this article, following four circuits of closed loop configuration of Op-amp are explained. Inverting amplifier Sign changer Non-inverting amplifier Voltage follower
In open loop mode there is no feedback present in between ouput and input. There are three open loop configuration of Op-amp. 1) Differential amplifier 2) Inverting amplifier and 3) Non-inverting amplifier Differential Open Loop Amplifier In the differential amplifier input is applied to both inverting and non-inverting terminals. There is no feedback present in
Configuration of op-amp means the ways in which an op-amp is connected in circuit. Based on the connection, the op-amp can work in two different modes. 1. Open loop mode 2. Closed loop mode Open Loop Configuration of Op-amp When no part of output is connected to input, it is known as open loop configuration.
