TAPR1.3

CONT. FROM TAPR1.2

                                             +5 v
                                               _
                                               |
                                             D o------------------
                                               |                 |
                                               \                 |
                                          10K  /                 |
            74HC74 Dual D Flip-Flop            \                 |
                                               /                 |
                                               |                 |
                    ---------------------------o                 o---
                    |10              |4        |                 |   |
                ----o----        ----o----     |                 |14 |
             12 |  PR   | 9    2 |  PR   | 5   |                VCC  |0.047 uf
       A -------| D   Q |--------| D   Q |---------- B              ---
   Slicer    11 |       | 8    3 |       | 6   |  Buffered          ---
   data in   ---|>CLK QN|-    ---|>CLK QN|-    |  data out      GND  |
             |  |  CL   |     |  |  CL   |     |                 |7  |
             |  ----o----     |  ----o----     |                 |   |
             |      |13       |      |1        |               E o---
      16x    |      -----------------o----------                 |
   clock in  |                |                                 ---
       C ----------------------                                  -

                      Figure 1:  DOUBLE BUFFER CIRCUIT