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Homework Statement
In Fig a line is used to produce a short rectangular pulse of width 12ns and peak value 800V. With S-2 open. S-1 is closed to charge the line to Vdc; after charging, S-1 is opened. Then, at t = 0, S-2 is closed to discharge the line through RR and form the pulse. Find the length of line and Vdc
[PLAIN]http://img51.imageshack.us/img51/4968/capturezc.jpg
Answer :- 1.2 m , 1600 V.
Homework Equations
v = 1/[tex]\sqrt{\mu\xi}[/tex]
The Attempt at a Solution
Velocity in the Tx line would be 2 x 10^8 m/s by making use of the formula.
Also as RR = Ro , equivalent ckt while discharging would be a voltage divider circuit , so Vout will be 1/2(Vdc) .So we need a Vdc of 1600 V.
But I am unable to work out how the pulse would be generated.
I mean how is the Tx line charged and discharged in general.After switch S2 is closed do we treat the lines as a voltage source and for how much time will the discharge take place?
Confused , help please.
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