Signal conditioning system enhances the quality of signal coming from a sensor in terms of:

1. Protection

   To protect the damage to the next element of mechatronics system such microprocessors from the high current or voltage signals.

2. Right type of signal

   To convert the output signal from a transducer into the desired form i.e. voltage / current.

3. Right level of the signal

   To amplify or attenuate the signals to a right /acceptable level for the next element.

4. Noise

   To eliminate noise from a signal.

5. Manipulation

   To manipulate the signal from its nonlinear form to the linear form.

 1. Amplification/Attenuation

Various applications of Mechatronics system such as machine tool control unit of a CNC machine tool accept voltage amplitudes in range of 0 to 10 Volts. However many sensors produce signals of the order of milli volts. This low level input signals from sensors must be amplified to use them for further control action. Operational amplifiers (op-amp) are widely used for amplification of input signals. The details are as follows.