phase comparator

phase comparator

[′fāz kəm‚par·əd·ər]
(computer science)
A comparator that accepts two radio-frequency input signals of the same frequency and provides two video outputs which are proportional, respectively, to the sine and cosine of the phase difference between the two inputs.
References in periodicals archive ?
This A7 frequency and phase comparator has been redesigned using new circuit technologies to achieve better resolution of frequency and phase differences between highly stable oscillators and frequency standards at lower noise levels.
There, the 5Mhz signal from clock A is compared to the one of clock B, by the use of a digital phase comparator (like those used in PLL).
An intermediate frequency (IF) output from each receiver is passed to a phase comparator, which measures the relative phase of the two signals.
The loop filter, which is a low-pass filter inserted between the phase comparator and the VCO control voltage input terminal, eliminates the high frequency component of the phase correction pulse generated by the phase comparator so that only the DC component is provided to the VOC.
This requires cables of exactly the same length and exactly the same phase response through the antennas, receivers and any preamplifiers and switches, all the way to the phase comparator - for all signal strengths and at all temperatures.
The phase comparator gain [K.sub.p] depends on the phase comparator type.
Constructed of GaAs Schottky diodes and novel planar transformer baluns on the chip, the mixer can be used as an up- or downconverter, biphase (de)modulator or phase comparator. Designed specifically for 5.9 to 11.7 GHz microwave radio and very small aperture terminal applications, the unit has a high dynamic input signal range, small size and zero DC bias requirement.
The phase comparator compares the phases of two signals.
A phase comparator is also included, which compares the two signals at 30 kHz.
It is also called a phase comparator, logic circuit, frequency mixer, or an analog multiplier that generates a voltage signal and this voltage signal shows the phase difference.