Analog Electronics - Engineering

Q1:

A 12 kHz pulse wave-form is amplified by a circuit having an Upper cut-off frequency of 1 MHz. The minimum input pulse width that can be accurately reproduced is

A 83.33 μ sec

B 1 μ sec

C 0.1 m sec

D 3.5 m sec

ANS:B - 1 μ sec

tr = 10% Pω = minimum Power(P) = 10 tr 10 x 0.35 μ sec = 3.5 μ sec. Note: The I/P Pulse will be severely distorted if the rise time is more than 10% of Pulse width.