The phase detection circuit composed of MAX4521

Published:2011/7/15 22:18:00 Author:Borg | Keyword: phase detection circuit | From:SeekIC

This is a phase detection circuit composed of computing amplifier TLC072 and analog switch MAX4521, which is fitted in PLL circuits or lock amplifiers. The voltage of the power supply is ±5V, the LEV of input and output signals is under ±4V, the working frequency is 10HZ~1OOkHZ. Ui1 and Ui2 are the input sine wave and square wave respectively, the duty cycle of the square wave is 50%, the output waveform of A1 is U. see as figure 7-15(b), when Ui1 and Ui2 are in the same phase, the output of A1 is shown as the waveform of ① in figure (b); when Ui1 and Ui2 are in the phases that differ 90°, the output of A1 is shown as the waveform of ② in figure (b).



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