Recent content by crixus

Thanks for replying. In fact I was able to figure out. Like if we have a MISO system with each antenna transmitting same symbol then diversity gain would be 1. However if I have multiple receive antennas then diversity gain would be L = no of independent fading paths. Thus "full diversity gain"...

δ(t) is the Dirac Delta function called an impulse. So for a system with impulse as an input the corresponding output would give you the response namely the impulse response. Impulse response are significant because any linear time invariant system can be characterized by stating just its...

What is meant by achieving "full diversity gain over Rayleigh fading channel"?

Hey Did u notice that the node between C and R1 is a virtual ground.

To calculate transfer function you basically need to compute Vout/Vin. Introduce a variable V for the intermediate node, and apply KCL equations and eliminate V to obtain a relation between Vout and Vin.

I didn't get "the curve made to diodes third approximation". Could you clarify...

Yeah it can get tricky for a newbie but stick to basics... First of all realize that the wire connecting the two parts of the circuit cannot provide for both forward and return path for current. So current in the middle wire has to be zero. Now analyse both the parts of the circuit individually...

Here I have highlighted what is necessary for better understanding... :)

First look at the diagram on the extreme left... There are two current sources whose elaborate ckt is given in he middle diagram. the current source I1 charges the capacitor until it reaches Vh which changes the output of the schmitt trigger(right) and connects I2 to capacitor as well.Now if...

Whatever the schematic , the fact is VCO shows non linearity in its frequency vs Vc(control voltage) characterstic. Can u explain that ?

The VCO is not completely op amp based... Let me make it easy... The VCO here has three parts 1) A transistor switch - Controls charging and discharging of capacitor 2) A Schmitt trigger - Which Controls the transistor switch. 3) The current sources I1 and I2 Although i am clear about the...

I recently designed a circuit of VCO and obtained a plot for frequency v/s Vc(control voltage). The graph was pretty much linear for a certain range of Vc but tends to become non linear when Vc is further increased or decreased. How do I explain the non linearity...?? The schematic of...

I am a junior undergraduate pursuing electrical engineering and needed some help as to where should i apply for summer 2012 and whether industry exposure is important or university research intern is suitable for me at this stage.. I am based in India :) Many thanks in advance

You should post the pic of your question kinda becomes hard to visualize (rather lazy):)

current is rate of flow of charge. So you need to take a derivative of the given expression. exponentials are dimensionless t = unit of time so T = time too :) as you take derivative you intitutively divide by DELTA t and take limit 0 so you have unit C/t = A