| Electronics > Beginners |
| Clock frequency divider circuit (divide by 2) using D flip flop |
| (1/1) |
| tarunkumartars:
how can we divide the frequency of (5MHz) with 50% duty cycle to half its frequency using D flip flops in hardware ? Thank you |
| MarkF:
You can also use 4-bit counters to divide by other powers of 2 (SN74LS160 and SN74LS190 series). These do not need to be LS versions. Could be CMOS if you need higher voltages. |
| tarunkumartars:
what would be output (Q) when there is no clock given ( initial condition when the Flip flop is just on)? And even negative edge trigger work as well right? |
| wraper:
--- Quote ---what would be output (Q) when there is no clock given ( initial condition when the Flip flop is just on)? --- End quote --- Unless you make power on delay for CLR, output on power on is undefined. --- Quote ---And even negative edge trigger work as well right? --- End quote --- It acts on positive edge. How is it supposed to divide anything while working for both edges? |
| wraper:
--- Quote from: MarkF on November 13, 2019, 01:27:22 pm ---These do not need to be LS versions. Could be CMOS if you need higher voltages. --- End quote --- LS series should die already. Even if you use 5V, there is little reason to use LS, not 74HC74. For higher voltages it would be CD4000 series. |
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