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By linearity we know that the output will simply be the sum of two of the system’s impulse responses, each with the unique time shift applied to the impulses. The convolution is to recognize that any input signal can be broken down into a summation of impulses of varying amplitudes. So the output is simply a summation of scaled versions of the impulse response! Take a look at the expression for convolution, that’s all that’s happening

In control system theory, the Routh?Hurwitz stability criterion is a mathematical test that is a necessary and sufficient condition for the stability of a linear time invariant (LTI) control system. The importance of the criterion is that the roots of the characteristic equation of a linear system with negative real parts represent solutions of the system that are stable (bounded). Thus the criterion provides a way to determine if the equations of motion of a linear system have only stable solutions, without solving the system directly.

Latching current. It is defined as the minimum anode current requires keeping turned on SCR after removing gate signal

A chopper is a device that converts fixed DC input to a variable DC output voltage directly. Essentially, a chopper is an electronic switch that is used to interrupt one signal under the control of another.

Defibrillation is a treatment for life-threatening cardiac dysrhythmias, specifically ventricular fibrillation (VF) and non-perfusing ventricular tachycardia (VT).A defibrillator delivers a dose of electric current (often called a countershock) to the heart.

MR Safe -the device, when used in the MRI environment, has been demonstrated to present no additional risk to the patient or other individual

MR Conditional – an item that has been demonstrated to pose no known hazards in a specified MRI environment with specified conditions of use.

MR Unsafe – an item that is known to pose hazards in all MRI environments. MR Unsafe items include magnetic items such as a pair of ferromagnetic scissors.

In EHV range, it is the switching over voltages in transmission line and other types of over voltages that determine the insulation level of the lines and other equipment and consequently, they also determine their dimensions and costs.

Open loop system is more stable means that the output of the system remains constant even after disturbances and less accurate because feedback is not present.

Q meter basically operates on the characteristics of a series resonant coil. In a series resonant circuit the voltage drop across the coil or a capacitor is equal to the applied voltage multiplied by its Q factor.

Generally EHV equipment for maintainance is isolated and connected to ground because grounding is provided to get low resistance and for providing level of protection .

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