Compose your own definition of binary
counter. (use http://www.onelook.com,
your textbook, or electronics dictionaries)
Refer to Fig. 8-1 (below). Describe
this binary counter using characteristics commonly associated
with counters. These might include bit size, counting
sequence, up/down counter, ripple or synchronous counting,
self-stopping or recirculating type. <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::Figure 8-1::/sites/dl/free/0073126349/443700/fig8_1.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif">Figure 8-1 (3.0K)</a>Figure 8-1
Refer to Fig. 8-1 (above). If the
input clock frequency is 16k Hz, what will be the output
frequency at A, B, C, and D?
Redraw the 4-bit binary counter from
Fig. 8-2 (below) to form a modulo-9 counter with a binary
counting sequence of 0000, 0001, 0010, 0011, 0100, 0101,
0110, 0111, 1000 and then starting over at 0000. HINT:
adding a 2-input NAND gate will be useful. <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::Figure 8-2::/sites/dl/free/0073126349/443700/fig8_2.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif">Figure 8-2 (3.0K)</a>Figure 8-2
Redraw the 4-bit binary counter from
Fig. 8-2 (above) using circuit simulation software. Add
a 2-input NAND gate to form a mod-10 counter with a binary
counting sequence of 0000, 0001, 0010, 0011, 0100, 0101,
0110, 0111, 1000, 1001 and then starting over at 0000.
Test the mod-10 (decade) counter and show your instructor.
Refer to Fig. 8-3 (below). Describe
this binary counter using characteristics commonly associated
with counters. These might include bit size, counting
sequence, up/down counter, ripple or synchronous counting,
self-stopping or recirculating type. <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::Figure 8-3::/sites/dl/free/0073126349/443700/fig8_3.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif">Figure 8-3 (4.0K)</a>Figure 8-3
Redraw the 3-bit ripple counter in
Fig. 8-3 (above) so that it recirculates. A typical binary
counting sequence might be 111, 110, 101, 100, 011, 010,
001, 000, 111, etc.
Redraw the 3-bit binary counter from
Fig. 8-3 (above) using Electronics Workbench® circuit
simulation software so that the binary counting sequence
is 111, 110, 101, 100, 011, 010, and then stops at 001.
Test the self-stopping down counter and show your instructor.
Refer to Fig. 8-3 (above). What are
the modes of operation of the J-K flip-flop (FF1) during
the count sequence (binary 111 to 000)?
