Boris Ivanov Evstatiev

8 Questions 38 Answers 0 Followers

Questions related from Boris Ivanov Evstatiev

How to properly create a square waveform with SPICE?

I am working on a virtual reality engine in electrical engineering and am trying to implement the work of a function generator and an oscilloscope. The engine uses SPICE (NGSPICE) for circiut...

20 August 2017 268 4 View

How much energy is lost when charging a battery?

Capacitors and batteries are similar and different. One stores energy as electric field, the other one as a chemical reaction. However when charging a capacitor (RC circuit), 0.5CV2 [J] of energy...

23 April 2016 7,763 20 View

How are the number of states in a Markov's chain usually determined?

Consider we have a dataset of discrete values and want to create a random generator based on them. So we need to divide these values into zones (states). But how do people normally choose the...

13 October 2015 5,736 9 View

How can I relate a transmission line's propagation constant with the ABCD parameters?

Consider a transmission line with Z0=R+jXL and Y0=G+jXC. The propagation constant and the characteristic impedance are: γ=Sqrt(Z0Y0) ZC=Sqrt(Z0\Y0) Considering the transmission line is symmetric,...

02 August 2015 6,178 5 View

How can we estimate active power for rectified waves?

Consider we have the instantaneous voltage and current of a full wave (first image). The active (average) power is obtained as shown in the second image (continuous and discrete values...

10 July 2015 7,410 6 View

How to approximate torque from current and voltage?

I need to estimate the torque τ(t) of a three-phase motor during the initial acceleration. I have readings of the instantaneous values of current and voltage (relative to ground) for one of the...

27 May 2015 6,144 3 View

Is there a name for this probability?

Consider there is a discrete random process x(t) which includes N number of samples. x(t) crosses the level L n number of times. The level crossing probability of x(t) with level L will then...

01 November 2014 5,545 4 View

What applications could this random generator have?

I have developed a random number generator and wonder what commercial applications it could have. I am trying to decide if it's worth patenting it. Here is a short description. Key featuresThe...

01 August 2014 585 6 View