Concept explainers
The minimum number of pins needed for a dual-op-amp and quad-op-amp IC package.

Answer to Problem 2.1P
The minimum number of pins needed for dual-op-amp and quad-op-amp IC package will be 8 and 14 respectively.
Explanation of Solution
A single op-amp must have at least 5 pins: 2 pins for the inverting and non-inverting inputs, 1 pin for the output and 2 pins for the positive and negative power supply.
For a dual-op-amp package, the number of pins needed will be 8. This can be explained in the following way: for the 2 op-amps, there will be 4 distinct inputs and 2 distinct outputs. This makes the number of pins required 6. Now, the common positive and negative power supply will be used for both the op-amps. This makes further 2 pins, making the total pins of IC package equal to 8.
For quad-op-amp package, the number of pins needed will be 14. 4 op-amps will have 8 distinct input pins and 4 distinct output pins. This makes the tally to 12. Now, the common positive and negative power supply will be used to energize the 4 op-amps. Therefore, the total number of pins for the IC package will be 14.
Therefore, the minimum number of pins needed for dual-op-amp and quad-op-amp IC package will be 8 and 14 respectively.
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