Summing amplifier, Other Engineering

Summing amplifier:

As the title implies, this is an adding device.  The circuit can take any number of voltage inputs, and the output voltage is simply the sum of these inputs. 

The circuit in Figure has a feedback loop containing a resistor Rf and the facility to sum three input voltages.

1295_Summing amplifier.png

 

It must again be emphasised that using negative feedback, the feedback loop forces the output to take on a value, which reduces the input difference voltage to zero. 

The input voltages V1, V2 and V3 are supplied to the inverting (-) terminal via resistors R1, R2 and R3.  Since the input difference voltage is zero, the potential at the inverting terminal and hence the junction of R1, R2 and R3 is the same as the non-inverting (+) terminal, which is earth.  Also, since the inputs are applied to the inverting terminal, the output voltage will experience an inversion (sign change). 

The output of the circuit, then, is the sum of the input voltages.  Note again that inversion takes place due to the inputs being applied to the inverting terminal.

Posted Date: 9/14/2012 6:14:37 AM | Location : United States







Related Discussions:- Summing amplifier, Assignment Help, Ask Question on Summing amplifier, Get Answer, Expert's Help, Summing amplifier Discussions

Write discussion on Summing amplifier
Your posts are moderated
Related Questions
variation of energy bands with alloy composition

Let C (K) denote a European vanilla Call option with strike price K. Assume that all options are identical except for strike price, and strike prices satisfy K1 What are the no-ar

notes on non tilting concrete drum mixers


two frames are not joint properly so create gap between two frames so material lick from this gap

Discuss the roles of international financial system in international business


We now have some idea about what models are available to simulate the flow over an aerofoil, and also how to use the Hanley package to apply these methods. Keep referring to you

what will be the methodology to calculate pitching moment damping coefficient of canrad of aircraft

The effect of swell factors on volumes