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Hello Friends
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
・Clock synchronization
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.
Thank you