Phase locked loop.i have function generator and that is of range upto 3 mhz. Is there any possible way to get above 6mhz signal using my 3mhz function generator .Thank you in advance
Yes, but it isn't easy. For a digital (pulse) output, the circuit in #2 will work at 6 MHz but the output won't be a symmetrical square wave unless you adjust the R and C values for a specific frequency. A phase locked loop is a more complex circuit, but it can be made to track the input over a range of frequencies. For an analog output like a sine wave you can use a balanced mixer circuit to double the frequency.i have function generator and that is of range up to 3 mhz. Is there any possible way to get above 6mhz signal using my 3mhz function generator .Thank you in advance
Another method that I didn't try, maybe it can solve the problem that you described, that is double and double frequency and using D flip flop to divide by 2 and then it will be a 50%/50% duty cycle as F= (3Mhz *2 * 2)/2 = 6Mhz.Yes, but it isn't easy. For a digital (pulse) output, the circuit in #2 will work at 6 MHz but the output won't be a symmetrical square wave unless you adjust the R and C values for a specific frequency. A phase locked loop is a more complex circuit, but it can be made to track the input over a range of frequencies. For an analog output like a sine wave you can use a balanced mixer circuit to double the frequency.
ak
I think that works only if the pulse stretchers are set to 50% of the input pulse width. Otherwise the divided output will not be symmetrical.
ak
Just double it twice and feed it through a divide 2 flip-flop.I think that works only if the pulse stretchers are set to 50% of the input pulse width. Otherwise the divided output will not be symmetrical.
ak
The state of the flip-flop outputs only change on either the positive or negative edge on the input.Yes, an asymmetrical pulse train, lets say a square wave with a 10% duty cycle, will, after going through one flip flop, produce a 50% square wave at 1/2 the original frequency. But that works only with 1 degree of asymmetry. If it isn't tuned for a specific frequency, a boxcar-type frequency doubler (example: R-C and XOR gate) will produce a wave that has a narrow pulse at each edge (both positive and negative) of the incoming wave. If the incoming wave is 10% duty cycle, then you get two pulses close together, a long gap, then two more pulses close together.
Unless you have two pulses close, then a long delay, then two close together again.The state of the flip-flop outputs only change on either the positive or negative edge on the input.
If for instance its negative edge clocked - it just doesn't care where the positive edge is in relation.
I don't think any of the frequency doubling solutions suggested so far can produce that situation.Unless you have two pulses close, then a long delay, then two close together again.
I was just trying to clarify what I think AK was trying to say above...I don't think any of the frequency doubling solutions suggested so far can produce that situation.
With a *REGULAR* pulse train....
A negative edge is a negative edge - unless you mean a pulse narrower than the flip-flop propagation delay.
I assume he means something like this...If the incoming wave is 10% duty cycle, then you get two pulses close together, a long gap, then two more pulses close together.
Not insurmountable - add one each extra x2 and divide 2 stages.I was just trying to clarify what I think AK was trying to say above...
I assume he means something like this...
View attachment 80395