This time, I am starting the work of Phase Comparator
It is very just an experimental design.
What is use it for?
･Phase detector for PLL
･Frequency comparator for FLL
With my DDS ...
･Vector Voltage Measurement
･Automatic Universal Bridge
･Tuning machine for musical instruments ?
Theory of operation
This logic come from 4046 type TTL, PLL device.
That TTL has 3 type phase detectors.
PC1 is exclucive-or method
PC2 is edge detected method
PC3 is RS-flip-flop method
Each has each characteristic.
PC2 has a feature different with others.
It have wide lock-in range and available to
frequency detection not only phase-range.
This is quite getting started now,
Has many unstable behavior still
I'm not certain that can use at actually.
There are some videos about "Synchronous Detection" in the library, just search for the words and look at parts 1 to 4. Probably that technique can help you with your project. When you send a mail to Chris Keeser or Dave van Ess you can ask for the complete project files.