1
GATE ECE 1991
MCQ (Single Correct Answer)
+2
-0.6
A silicon sample is uniformly doped with 1016 phosphorous atoms/cm3 and 2 ×1016 boron atoms/cm3. If all the dopants are fully ionized, the material is
2
GATE ECE 1991
Subjective
+5
-0
The program given below is run on an 8085 based microcomputer system. Determine the contents of the registers: PC, SP, B,
C, H, L after a half instruction is executed.
LOC
2000 START: LXI SP, 1000H
LXI H, 2F37 H
XRA A
MOV A, H
INX H
PUSH H
CZ 20 FF H JMP 3000 H
HLT
20FF ADD H
RZ
POP B
PUSH B
RNZ
HLT
LOC
2000 START: LXI SP, 1000H
LXI H, 2F37 H
XRA A
MOV A, H
INX H
PUSH H
CZ 20 FF H JMP 3000 H
HLT
20FF ADD H
RZ
POP B
PUSH B
RNZ
HLT
3
GATE ECE 1991
Subjective
+5
-0
The network shown in figure is
initially under steady-state
condition with the switch in
position 1. The switch is moved
from position 1 to position 2 at t =
0. Calculate the current
i(t) through R1 after switching.


4
GATE ECE 1991
MCQ (Single Correct Answer)
+2
-0.67
Two two-port networks are connected in cascade. The combination is to be
represented as a single two-port network. The parameters of the network are
obtained by multiplying the individual
Paper Analysis
Total Questions
Analog Circuits 2
Communications 3
Control Systems 6
Digital Circuits 4
Electromagnetics 5
Electronic Devices and VLSI 3
Microprocessors 1
Network Theory 4
Signals and Systems 5
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