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
What is RAROC?  RAROC is a risk-adjusted structure for earnings statistic and earnings control. It is a device for calculating risk-adjusted financial efficiency. And it provide

Protected escape routes - fire protection engineering: Protected escape routes: Does the fire resistance fully enclose the protected routes? Do the fire doors

2. Differentiate between stream oriented and data gram oriented socket in java?

I need the answers of these three problems. 1. How much money would be in a savings count that started with a deposit of $2,000 in year 1 with each succeeding amount increasing by

Sonic airflow though divergent and convergent ducts When a flow of fluid (i.e. gas) flows at sonic speed through a convergent duct a shock wave forms at the exit area of the du

The demand placed on a system is described by a lognormally distributed random variable with mean 50 and standard deviation of 10. The capacity of the system is modeled by a Weibul


copper and its alloys

Electronic APU fuel control System in Aircraft : Electronic fuel control emulates the mechanical system, however it provides control in a slightly different way. The electronic

ABC Ltd. has an investment opportunity available which will involve a capital outlay in each of the next 2 years and which will produce benefits during the following 3 years. A sum