It follows as predicted within the bandwidth
The precision is amazing when locked it mimics the precision of the cristal frequency generator…
The only problem is that the lock-in detector seems aways on even if the system is out of lock… although the led is little less bright
May need to change the capacitor
In the ultrasonic patent they use a window comparator instead of that lock-in logic and it makes sense…
Anyway it’s being enough off to allow the scanning to modulate the frequency… and lock
The signal at the scanning get totally modulated when the lock is in going in and out
That may be because of I’m hardwiring from the opamp to the pin 9 without a resistor between and maybe a voltage follower may also help keep the ramp stable…
I’m using 100kohm 10nf for the filter and seem to low resistor also the damping resistor is 10kohm
For the amount of work involved I would charge at least 500 dollar for a unit of this analog pll
If anyone is interested I’m going to make the pcb professionally very soon to make everyone’s life easier
In the case anyone is interested let me know…
The digital version is the same as there is the digital work programming and maintaining the program and Wi-Fi updates till a working unity
Today i used it to test the following… so is just an example why you must have at least two frequency pll generators
One will help tune the other
The digital have plus triangle and sine waves output… and is a digital version of the pll
The advantages are obvious.. for example a window comparator could be done digitally
The filter components are digital
So is just about changing parameters and save, and to not keep changing components anymore
Also has the frequency display in front and can be used as a counter for display the frequency of the analog ckt as well
Just add it as the feedback for example and Create a function
That way is possible to have a nice time working on this tech and also helping me be able to spend more and build more stuff
I’m spending 1000 dollars per month for living and maintaining the business so just as a comparison to see how much my time cost me
Is important people see the value is not only the components but the work done, the countless hours of research to know how to do, and also a dose of craziness to have keep this work for so long and lastly the components cost
It does not matter if you can buy the components if you can’t make it work because of the missing knowledge and effort
What I’m trying to say is that if some of this unities are sold even if I will spend some time building it to send… it will help me allowing few more days per month working at this instead of at my work that I need to pay the bills… at minimum will help keeping me focus on it a few more and also more energized to know someone is also working with me and depending on me to advance… that sense of responsibility is something that would helps me keep going
I fell too lonely on this…