NTE974
Description
: The NTE974 consists of two digital phase detectors, a charge pump, and an amplifier. In bination 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, is out of lock. Absolute Maximum Ratings: Supply Operating Voltage Range
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- - . . . . 4.75 to 5.25V Supply Voltage, VCC
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- - . . +7.0V Input Voltage, VI
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