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Q#1
OP-AMP and its Applications
GATE EC 2025
NAT
+1 mark
-0 marks
A 4-bit weighted-resistor DAC with inputs 
, and 
(MSB to LSB) is designed using an ideal opamp, as shown below. The switches are closed when the corresponding input bits are logic ' 1 ' and open otherwise.
When the input 
changes from 1110 to 1101, the magnitude of the change in the output voltage 
, rounded off to the nearest integer) is ___________ .
Explanation:
Given op-amp circuit is inverting summing amplifier
for 
For 
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