5. The block diagram of Figure 5 shows a 3-stage asynchronous counter
that is used to count a series of randomly occuring input pulses.
The q outputs of the counter are used to drive a logic circuit that gives the output in TABLE 1.
(a) Counter DesignImages Not ShownConsider Table 1 in XXX image XXXXX. XX XXXXX XXX expected XXXXXX of the counter XXX XXX input XXXXXX (i.e as pulse XXXXX goes XXXX X to X XXX bits XX Q2 Q1 XXXXXX show XXX corresponding binary XXXXXXXXXXXXXX). XXXX the table we can XXX,
Notice that Q1, XXX XXXXX significant XXX (LSB), XXXXXXX XXX XXXXX input XXXXX. XX we shall XXX the input XX clock XX the XXXXX XXXX XXXX that XXXXXXX the XXXFurther, XX find XXXX for every XXXXXXXXXX of Q1 XXXX 1 to X, Q2 toggles XXX state. XX XX XXX Q1 to clock XXX XXXXXX flip flop. Moreover XXXXX 1->0 XXXXXXXXXX is XXX XXXXXXX, we XXX negative edge XXXXXXXXX XXXX flops.Similar to XXXXX (X) we can XXX XXXX XX XXXXXXX for XXXXX 1-&XX;X transition XX Q2. Hence Q2 is XXXX to XXXXX the XXXXX and XXXXX flip XXXX
A D flip XXXX forwards XXX XXXXX state XX output XXXX triggered. XXXX XXX XXXXXX XXXXX XX know that XX want XXXX XXXXXX bit to toggle XXXX triggered. XX we XXXXXXX Images Not Shown XX each flip flop XXXX to XXX input Images Not Shown.
XXX XXXXXX XXX XXXXX XXXX of XXX flip flops XXX active XXX and hence connected to Images Not Shown
Fig1 in the image above shows XXX complete counter XXXXXXX. Fig 2 in the XXXX XXXXX XXXXXXXX the XXXXXX XXXXXXX based on the XXXXXXX XXXXXXX XXXXXXXXX above.
(b) XXXXX XXXXXXX XXXXXX.
XX know the truth table for input pulse v/s counter XXXXXX from image in XXXX (a).
XXXX (b) XX the question XXXXX XX the table for input pulse v/s logic circuit XXXXXX.
XX XX can get XXX XXXXX table for (XX Q2 Q1) and (X X X A) XXXXX in the XXXXX below.
XXXXX XXXX table XX XXX solve the K-maps for each XXXXXX and express XXXX in terms of XX, Q2, Q1
As XXX XX XXXX from XXX XXXXX:
Images Not Shown
as XXXXXXX XXXX tableImages Not Shown
Images Not Shown
Images Not Shown
Corresponding logic circuit XXX XX XXXXX in the following image.
Images Not Shown
">