Hello, in general theory we have type two system and velocity input as shown in the link and photo below.
Is there an electronic example of type to system with velocity input?
and the feedback mecahnism to it?
Thanks.

 

That looks a whole lot like homework in a second semester feedback control systems course.

 

I want to learn out of curiosity analog PLL

 

Look back to the derivation of the differential equation for a mechanical damped harmonic oscillator. Then compare it to the differential equation for a forced RLC circuit. You will note that both equations have the same form. It should be straightforward to identify the velocity term in the mechanical equation and the corresponding term in the electrical equation.

 

yes the equation side i will see but I have tsmc 180nm PDK.
Is there a good book that implements in analog way PLL parts so i could try and simulate in ltspice?