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phase-modulation detector
Science; General science
A device that recovers or detects a signal from a phase-modulated carrier. A phase-modulating (PM) signal operating on a sinusoidal carrier can be recovered in a variety of ways ...
vacuum pump
Science; General science
A device that reduces the pressure of a gas (usually air) in a container. When gas in a closed container is lowered from atmospheric pressure, the operation constitutes an ...
aircraft collision avoidance system
Science; General science
A device that reduces the risk of midair collision by providing advisories to the flight crew. It is known in the United States as a Traffic Alert and Collision Avoidance System ...
spark plug
Science; General science
A device that screws into the combustion chamber of an internal combustion engine to provide a pair of electrodes between which an electrical discharge is passed to ignite the ...
instrument transformer
Science; General science
A device that serves as an input source of currents and voltages from an electric power system to instruments, relays, meters, and control devices. The basic design is that of a ...
phase modulator
Science; General science
A device that shifts the phase of a sinusoidal carrier signal, c ( t ), in proportion to the instantaneous amplitude of the information signal, s ( t ). Since the definition of ...
atomic clock
Science; General science
A device that uses an internal resonance frequency of atoms (or molecules) to measure the passage of time. The terms atomic clock and atomic frequency standard are often used ...
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- Acoustics (1199)
- Basic science (4082)
- General science (120567)