Here's an explanation:
In DS SSM, we use a randomly generated bit sequence at high frequency.This sequence we call as pseudo noise and the generator as a Pseudo Random Binary Sequence generator(PRBS). It is pseudo random b'coz(only then,we can demodulate of course) we know the initial 'seed'...
Hi There,
CMRR = Differential Gain/Common Mode Gain(of course!).
You are on the rigth track.Just ensure proper grounding of teh supply,use by passes for blocking stray currents,and then apply a 10Vp-p 1Khz Signal in Common Mode and Differential Mode.Just measure the gains and find the ratio.
Hi,
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Hello There,
The RC filter has the eqv. digital domain Difference Equation as: y[n]=x[n]+y[n-1];
So all you need for this LPF are a full adder and a d flipflop(delay element).
To the adder add the input and the output fed back through the delay element.
That should be it!
Hello There,
Carrier freq. selection hasn't the slightest bearing on the BW.BW required rather depends on the message bearing siganl and its nature(for audio 2*4Khz).
The fundamental purpose of Modulation is spectral translation and the extent of translation required is decided by the carrier...