Simple Embedded Solutions

21. What is Sampling? Sampling is the process of converting a continuous-time signal to a discrete-time signal, in order for computers to process the data digitally. The signals we use in the real world, such as our voices, are called "analog" signals.  To process these signals in computers, we need to convert the signals to the "digital" form.  While an analog signal is continuous in both time and amplitude, a digital signal is discrete in both time and amplitude.  To convert a signal from continuous-time to discrete-time, a process called sampling is used. Sampling If the sampling is not proper we can't reconstruct the original wave. While reconstructing the signal with fewer samples, some unwanted components will present at the output. This problem is called Aliasing. This will happen when high-frequency components are sampled at a low-frequency rate. 22.  Sampling Theorem The Sampling Theorem states that a signal can be exact...

11.   How do you perform current sensing? There are different methods to sense and  measure current inside a circuit or a conductor some of the methods are mentioned below. Based on the load current rating and Isolation requirement, we have select one of the methods given below.  Rogowski coil Flux Gate Current transformer Hall sensor  Shunt resistor  12. Why do we need SPICE models? SPICE is  a computer simulation and  modeling  program used to mathematically predict the behavior of electronics circuits. 13. Why we need a Sample and Hold circuit? A sample and hold circuit is an analog circuit that samples the voltage of a continuously varying analog signal and holds its value at a constant level for a specified minimum period of time.  Sample and hold circuits are commonly used in A/D converters, Communications circuits etc.. 14. How can we detect a peak value of a waveform? Using peak detector we can detect. The pe...