MC74HC4046A
Phase-Locked Loop
High−Performance Silicon−Gate
CMOS
The MC74HC4046A is similar in function to the MC14046 Metal gate
CMOS device.
The device inputs are compatible with standard
CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs.
The HC4046A phase−locked loop contains three phase comparators, a
voltage−controlled oscillator (VCO) and unity gain op−amp DEMOUT.
The comparators have two common signal inputs, COMPIN, and SIGIN.
Input SIGIN and COMPIN can be used directly coupled to large
voltage signals, or indirectly coupled (with a series capacitor to small
voltage signals).
The self−bias circuit adjusts small
voltage signals in the linear region of the am...