ISRO Scientist or Engineer Electronics 2013
For the following questions answer them individually
The closed loop frequency response of a dc-dc converter is shown in following figure. What are the gain and phase margins?
If for a silicon npn transistor, the base-to-emitter voltage (VBE) is 0.7V and the collector-to-base voltage (VCB)is 0.2 V, then the transistor is operating in the
An 8 bit ripple counter and an 8 bit synchronous counter are made using flip flops having a propagation delay of 10 ns each. If the worst case delay in the ripple counter and the synchronous counter be R and S respectively, then
Gain of an RC low pass filter having a time constant $$‘\tau’$$ and frequency $$‘\omega’$$ is:
For a directional coupler, the quantities I (isolation in dB), D (directivity in dB), C (coupling in dB) are related by
The two numbers represented in signed 2’s complement form are P = 11101101 and Q = 11100110. If Q is subtracted from P, the value obtained in signed 2’s complement is
