# function and graph in electronics

Discussion in 'Math' started by vead, Aug 21, 2016.

Nov 24, 2011
712
11
Hello
We know voltage and current signal represent over time
Example :voltage at 2 sec , voltage at 3 sec... Etc. Also voltage and current signal represent by the sin, cos waveform. I understand that dv/dt means rate of change of voltage over time. What is use of functions and derivatives of function in electronics circuit. Please someone can explain with example related with electronics?

2. ### WBahn Moderator

Mar 31, 2012
23,389
7,099
The voltage across an inductor is proportional to the time rate of change of the current through it.

V = L · di/dt

Now go read (and study) the chapter on first-order circuits in just about any introductory EE text.

3. ### crutschow Expert

Mar 14, 2008
20,503
5,809
We need calculus to calculate the operation of electronic circuits because the currents and voltages of capacitors and inductors are a function of time and calculus is needed to calculate that variation with time.
We can use Laplace transforms to convert the calculus functions to algebraic equations that are easier to solve, but the basis of those function is calculus.