Jun15

## Differential Amplifier

This is the last article in the series of differential op-amp circuits. This is one of the most important operational amplifier circuits and hence it was saved for the last. The speciality of using differential amplifier is that it uses both inverting and non-inverting input terminal to amplify one input signal, while other is fastened to ground Let me remind you that the output is equal to the difference of the input, and as said...

Jun08

## The Basic Anti-log Amplifier

The result we get when the base is raised to the power equal to the logarithm of that number is called anti-logarithm of that number. This particular setup can be formed by connecting the transistor or diode as the input element in contrary to logarithmic amplifier. The exponential formula still applies to base emitter PN junction. The circuit for the anti-logarithmic amplifier is as shown below: ANTI-LOGARITHMIC AMPLIFIER USING BJT...

Jun07

## Logarithmic Amplifier

Whenever we are in need of compression of analog input data, we go for logarithmic and anti-logarithmic amplifier. If we need to linearize the transducer that have exponential output and to perform analog multiplication and division, we need to go for logarithmic amplifier We should use a device, which exhibits logarithmic characteristics as a feedback element. It should produce the logarithmic response, which eventually means that...

Jun06

## Differentiator using Operational Amplifier

From the series of operational amplifier articles, today will see about differentiating using operational amplifier. Of these differentiating concepts, we use Resistor in the feedback path and capacitor as the input element, fed to the inverting input of the operational amplifier. It leads to the time differentiation of the input signal. The circuit needed for differentiating using op-amp is shown below   DIFFERENTIATOR USING...

Jun05

## Integrator using Operational Amplifier

So, far till now we have only seen resistor being used in input and feedback, now we are going to use a capacitor in Integrator using operational amplifier, this capacitor forms an RC Circuit with an input resistor. A large value of the resistor is required, because the gain should be limited. The circuit for integrator using operational amplifier is as shown below INTEGRATOR USING OPERATIONAL AMPLIFIER From the concept of virtual...