Fig. 6. AM detect/on using second internat phase comparator

F/ft fo 4 V/ i/p/ct /ra/? f/>;/?</ external phase shift network*

paralorĀ« we can demodulate amplitude modulation. Internal operation is shown in Fig. 6 where the VCO output of 90" h changed to 0Ā°, Or as in Fig, 6a where a whole new phase shift neiwoik s used. The 561 chip has an Internal capability fui AM detection along With its i M Ciip^Lnlity.

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