For autofocus in cameras, see Autofocus § Phase detection.
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Four phase detectors. Signal flow is from left to right. In the upper left is a Gilbert cell, which works well for sine waves and square waves, but less well for pulses. In the case of square waves it acts as an XOR gate, which can also be made from NAND gates. On the middle left are two phase detectors: adding feedback and removing one NAND gate produces a time frequency detector. The delay line avoids a dead band. On the right is a charge pump with a filter at its output.
A phase detector or phase comparator is a frequency mixer, analog multiplier or logic circuit that generates a signal which represents the difference in phase between two signal inputs.
The phase detector is an essential element of the phase-locked loop (PLL). Detecting phase difference is important in other applications, such as motor control, radar and telecommunication systems, servo mechanisms, and demodulators.
A phasedetector or phase comparator is a frequency mixer, analog multiplier or logic circuit that generates a signal which represents the difference...
A phasedetector characteristic is a function of phase difference describing the output of the phasedetector. For the analysis of Phasedetector it is...
and organometalics. In this type of detector either nitrogen or 5% methane in argon is used as the mobile phase carrier gas. The carrier gas passes between...
two phasedetectors, e.g., product detectors. The same phase of the input signal is also applied to both phasedetectors, and the output of each phase detector...
order to generate random numbers. XOR gates may be used in simplest phasedetectors.: 425 An XOR gate may be used to easily change between buffering or...
digital, rather than analog, control signal. The phasedetector gives a signal proportional to the phase difference between two signals; in a PLL, one signal...
A metal detector is an instrument that detects the nearby presence of metal. Metal detectors are useful for finding metal objects on the surface, underground...
fed into a phasedetector. Stationary objects did not change the phase from pulse to pulse, but moving objects did. By storing the phase signal, instead...
An envelope detector (sometimes called a peak detector) is an electronic circuit that takes a (relatively) high-frequency amplitude modulated signal as...
A motion detector is an electrical device that utilizes a sensor to detect nearby motion. Such a device is often integrated as a component of a system...
A defect detector is a device used on railroads to detect axle and signal problems in passing trains. The detectors are normally integrated into the tracks...
interactions in a liquid xenon target chamber. The current detector consists of a dual phase time projection chamber (TPC). The experiment detects scintillation...
envelope detector, the product detector takes the product of the modulated signal and a local oscillator, hence the name. A product detector is a frequency...
A crystal detector is an obsolete electronic component used in some early 20th century radio receivers that consists of a piece of crystalline mineral...
undesired change in the relationship between the frequency step size and phasedetector comparison frequency. For this reason, it is common to either restrict...
The charged aerosol detector (CAD) is a detector used in conjunction with high-performance liquid chromatography (HPLC) and ultra high-performance liquid...
ProtoDUNE detector, and another eight weeks to fill it with 800 tons of liquid argon. Originally, one detector was built to be single-phase (ProtoDUNE-SP)...
an input signal as in a receiver, but also as a product detector, modulator, phasedetector or frequency multiplier. For example, a communications receiver...
flame ionization detector (FID) is a scientific instrument that measures analytes in a gas stream. It is frequently used as a detector in gas chromatography...
A Daly detector is a gas-phase ion detector that consists of a metal "doorknob", a scintillator (phosphor screen) and a photomultiplier. It was named after...
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