Flip-flop summary (con’t)

• J-K latch is rarely used in contemporary design

  • Read about it in the text

• T flip-flops are sometimes used in state-machine design

  • True input causes state to toggle

• Master/slave flip-flops are common in high-speed logic families called ECL or SCFL

  • Not common in CMOS design
  • Fast and transistor efficient in bipolar design

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