NTE974 Integrated Circuit Phase–Frequency Detector
Description: The NTE974 consists of two digital phase detectors, a charge pump, and an amplifier.
In combination with a
voltage controlled multivibrator, it is useful in a broad range of phase–locked loop applications.
The circuit accepts MTTL waveforms at the R and V inputs and generates an error
voltage that is proportional to the frequency and/or phase difference of the input signals.
Phase detector #1 is intended for use in systems requiring zero frequency and phase difference at lock.
Phase detector #2 is used if quadrature lock is desired.
Phase detector #2 can also be used to indicate that the main loop, utilizing phase detector #1, i...