What is the impulse response of an S/H, when viewed as a linear filter?

h(t)= ( begin{cases}1,0 t T 0,otherwise end{cases} )

h(t)= ( begin{cases}1,0<t T 0,otherwise end{cases} )

In a D/A converter, the usual way to solve the glitch is to use deglitcher. How is the Deglitcher designed?

By using a low pass filter & S/H circuit

H(F)= ( begin{cases}T, |F| frac{1}{4T} = F_s/2 0,|F| > frac{1}{4T} end{cases} )

H(F)= ( begin{cases}T, |F| frac{1}{2T} = F_s/2 0,|F| > frac{1}{4T} end{cases} )

H(F)= ( begin{cases}T, |F| frac{1}{2T} = F_s/2 0,|F| > frac{1}{2T} end{cases} )

H(F)= ( begin{cases}T, |F| frac{1}{4T} = F_s/2 0,|F| > frac{1}{4T} end{cases} )

g(t)= ( frac{sin u2061(6 t/T)}{( t/T)} )

g(t)= ( frac{sin u2061(2 t/T)}{( t/T)} )

g(t)= ( frac{sin u2061( t/T)}{( t/T)} )

g(t)= ( frac{sin u2061(6 t/T)}{( t/T)} )

g(t)= ( frac{sin u2061(3 t/T)}{( t/T)} )

( sum_{- infty}^ infty x(nT) frac{sin u2061( /T) (t+nT)}{ /T)(t+nT} )

( sum_{- infty}^ infty x(nT) frac{sin u2061( /T) (t-nT)}{( /T)(t-nT)} )

( sum_{- infty}^ infty x(nT) frac{sin u2061( /T) (t+nT)}{ /T)(t+nT} )

( sum_{- infty}^ infty x(nT) frac{sin u2061(2 /T) (t-nT)}{2 /T)(t-nT} )

( sum_{- infty}^ infty x(nT) frac{sin u2061(4 /T) (t-nT)}{(4 /T)(t-nT)} )

1.	What is the impulse response of an S/H, when viewed as a linear filter?
A.	h(t)= ( begin{cases}1,0 t T 0,otherwise end{cases} )
B.	h(t)= ( begin{cases}1,0 t T 0,otherwise end{cases} )
C.	h(t)= ( begin{cases}1,0<t T 0,otherwise end{cases} )
D.	None of the mentioned
Answer» B. h(t)= ( begin{cases}1,0 t T 0,otherwise end{cases} )

2.	In a D/A converter, the usual way to solve the glitch is to use deglitcher. How is the Deglitcher designed?
A.	By using a low pass filter
B.	By using a S/H circuit
C.	By using a low pass filter & S/H circuit
D.	None of the mentioned
Answer» C. By using a low pass filter & S/H circuit

3.	The time required for the output of the D/A converter to reach and remain within a given fraction of the final value, after application of the input code word is called?
A.	Converting time
B.	Setting time
C.	Both Converting & Setting time
D.	None of the mentioned
Answer» C. Both Converting & Setting time

4.	D/A conversion is usually performed by combining a D/A converter with a sample-and-hold (S/H ) and followed by a low pass (smoothing) filter.
A.	True
B.	False
Answer» B. False

5.	The reconstruction of the signal from its samples as a linear filtering process in which a discrete-time sequence of short pulses (ideally impulses) with amplitudes equal to the signal samples, excites an analog filter.
A.	True
B.	False
Answer» B. False

6.	What is the frequency response of the analog filter corresponding to the ideal interpolator?
A.	H(F)= ( begin{cases}T, \|F\| frac{1}{2T} = F_s/2 0,\|F\| > frac{1}{4T} end{cases} )
B.	H(F)= ( begin{cases}T, \|F\| frac{1}{2T} = F_s/2 0,\|F\| > frac{1}{4T} end{cases} )
C.	H(F)= ( begin{cases}T, \|F\| frac{1}{2T} = F_s/2 0,\|F\| > frac{1}{2T} end{cases} )
D.	H(F)= ( begin{cases}T, \|F\| frac{1}{4T} = F_s/2 0,\|F\| > frac{1}{4T} end{cases} )
Answer» D. H(F)= ( begin{cases}T, \|F\| frac{1}{4T} = F_s/2 0,\|F\| > frac{1}{4T} end{cases} )

7.	What is the new ideal interpolation formula described after few problems with previous one?
A.	g(t)= ( frac{sin u2061(2 t/T)}{( t/T)} )
B.	g(t)= ( frac{sin u2061( t/T)}{( t/T)} )
C.	g(t)= ( frac{sin u2061(6 t/T)}{( t/T)} )
D.	g(t)= ( frac{sin u2061(3 t/T)}{( t/T)} )
Answer» C. g(t)= ( frac{sin u2061(6 t/T)}{( t/T)} )

8.	What is the ideal reconstruction formula or ideal interpolation formula for x(t) = _________
A.	( sum_{- infty}^ infty x(nT) frac{sin u2061( /T) (t-nT)}{( /T)(t-nT)} )
B.	( sum_{- infty}^ infty x(nT) frac{sin u2061( /T) (t+nT)}{ /T)(t+nT} )
C.	( sum_{- infty}^ infty x(nT) frac{sin u2061(2 /T) (t-nT)}{2 /T)(t-nT} )
D.	( sum_{- infty}^ infty x(nT) frac{sin u2061(4 /T) (t-nT)}{(4 /T)(t-nT)} )
Answer» B. ( sum_{- infty}^ infty x(nT) frac{sin u2061( /T) (t+nT)}{ /T)(t+nT} )