clock multiplication by 2

[kalaiyarasan]

how to implement clock multiplication by 2 in digital

phase shifting the clock by 90 degree and xor results in multiply by 2..

if this is the answer how to do phase shift

thanks in advance

 

[jeet_asic]

The obvious answer is to use a PLL. You can try the good old 4046, or the newer 74hc4046. https://www.onsemi.com/pub/Collateral/MC74HC4046A-D.PDF

But you can also use for example two one-shots (choose the timeout carefully), one treiggered on the rising edge, the other on the falling edge of the input signal. By OR-ing the outputs you obtain twice the input frequency. The duty-cycle will not be exactly 50%, nor very stable, though.

 

[imbichie]

Hi kalaiyarasan,

Actually there is no general method for clock multiplication without using a PLL,

But you can also try this also... see the number 4 of the below link

TechXclusives - Six Easy Pieces (Non-Synchronous Circuit Tricks)