S1 SELECT R Signal out SELECT R S2 Which of the following is the circuit shown a

Question

S1 SELECT R Signal out SELECT R S2 Which of the following is the circuit shown above? A) A precision analog multiplexer. If the signal S1 is high but S2 is low the signal SELECT appears on the output. However, if S1 is low and S2 is high, the signal SELECT appears on the output. B) A precision analog multiplexer. If the signal SELECT is low and SELECT is high, the signal S2 appears on the output. The opposite condition makes the signal S1 appear on the output. C) A non-functional circuit. The connection of the two transistors collectors to the Op-Amp inputs creates a short circuit condition and the circuit cannot perform any useful function.

Explanation / Answer

B) is the correct answer because when select is high then bjt will be on and makes negative feedback.

Here selection depends on select and select not s1and s2.

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