Digital Instrumentation and Output Devices

Notes

Sample Data System , Sample and Hold Circuit

The process by which the continuous-time signal is converted into a discrete–time signal is called Sampling. Sampling operation is performed in accordance with the sampling theorem.The method of sampling involves the division of input analog signal into a number of the possible periodic sampling signal. The sampling process is simply the multiplication of the analog signal by a chain of the pulse of unit magnitude. The sampling theorem states that “The analog input signal must be sampled at a rate which is

Component of Data Acquistion System

Data acquisition is the process of sampling signals that measure real world physical conditions and converting the resulting samples into digital numeric values that can be manipulated by a computer.Main components of a typical data acquisition system are Transducers and sensors,Signals,Signal conditioning,DAQ hardware, Driver and application software. Data acquisition hardware acts as the interface between the computer and the outside world. It primarily functions as a device that digitizes incoming analog