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High CMRR Instrumentation Amplifier (Schematic and Layout) design for biomedical applications

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Instrumentation amplifiers are intended to be used whenever acquisition of a useful signal is difficult. IA’s must have extremely high input impedances because source impedances may be high and/or unbalanced. bias and offset currents are low and relatively stable so that the source impedance need not be constant. Balanced differential inputs are provided so that the signal source may be referenced to any reasonable level independent of the IA output load reference. Common mode rejection, a measure of input balance, is very high so that noise pickup and ground drops, characteristic of remote sensor applications, are minimized.Care is taken to provide high, well characterized stability of critical parameters under varying conditions, such as changing temperatures and supply voltages. Finally, all components that are critical to the performance of the IA are internal to the device. The precision of an IA is provided at the expense of flexibility. By committing to the one specific task of
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To study DC potentiometer.

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Aim:- To study DC potentiometer.
Apparatus:- Power supply,(0-50v)
Battery,(0-30V)
Resister-100W
Circuit Diagram :-
Theory:-
The potentiometer although not consider a bridge has circuit that using a simple
circuit thermo becomes identical to the whetstone bridge. The potentiometer is a device
for measuring the voltage while presenting a very high impedance to the voltage source
under the Test.
The variable resister R1 is the precision device that can be set to an accurate value.
the resister is adjusted so that no current is flow through the galvanometer. which is the
similar to balancing the bridge.
At this point the zero current flow several important characteristics of the
potentiometer cab be determine.
Result:- To study the working of the DC potentiometer.
Viva questions:-
1) What is the importance of std.cell of the Dc potentiometer?
2) How the Unknown emf is calculated by the Dc Potentiometer

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