The flip – flop that cannot be used to construct a serial shift register is_____
Question
The flip – flop that cannot be used to construct a serial shift register is_____
Solution
The flip-flop that cannot be used to construct a serial shift register is the Toggle or T flip-flop.
Here's why:
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A serial shift register is a sequence of flip flops sharing the same clock, in which the output of one flip-flop is connected to the 'data' input of the next flip-flop.
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The most commonly used flip-flops in a shift register are the D (Data) and JK flip-flops because they have a clear distinction between the 'data' and 'control' inputs.
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The T (Toggle) flip-flop, however, does not have a separate 'data' input. It only has a 'control' input (the T input). When the T input is '1', the flip-flop toggles its output. But when the T input is '0', the output remains the same.
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Therefore, because the T flip-flop lacks a separate 'data' input, it cannot be used to construct a serial shift register.
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