A crystal detector is an obsolete electronic component used in some early 20th century radio receivers. It consists of a piece of crystalline mineral that...

component, a crystal detector, originally made from a piece of crystalline mineral such as galena. This component is now called a diode. Crystal radios are...

called a detector. A variety of different detector devices, such as the coherer, electrolytic detector, magnetic detector and the crystal detector, were...

responsible and most famous for the development of the crystal detector, the earliest type of diode detector, although he was not the earliest discoverer of...

"standard" 3″ x 3″ NaI(Tl) scintillation detector. Crystal growth techniques have since improved, allowing detectors to be manufactured that are as large...

miniaturized the crystal detector. Point contact diodes (crystal diodes) and Schottky diodes are used in radar, microwave and millimeter wave detectors. Rectifiers...

physicist Ferdinand Braun's crystal detector in 1874 and Indian physicist Jagadish Chandra Bose's radio crystal detector in 1901. In the years preceding...

over earlier detectors such as the coherer. One popular type of crystal detector, often called a cat's whisker detector, consists of a crystal of some semiconducting...

used until about 1913, after which it was superseded by crystal detectors and vacuum tube detectors such as the Fleming valve and Audion (triode). It was...

coupling, and later on the usage of crystals for receiving purposes. Around 1898, he invented a crystal detector [citation needed]. Wireless telegraphy...

had used earlier technologies such as the spark gap transmitter and crystal detector for radio or mechanical and electromechanical computers, the invention...

and hence the wavelength of the emitted optical photon. A scintillation detector or scintillation counter is obtained when a scintillator is coupled to...

synthetic zincite crystals are significant for their early use as semiconductor crystal detectors in the early development of crystal radios before the...

problematic. Crystal scintillator experiments are a middle ground between cryogenic crystal detectors and noble gas scintillators, using the crystals of the...

1907, when they were replaced by more sensitive electrolytic and crystal detectors. The behavior of particles or metal filings in the presence of electricity...

operation of his galena crystal detector in his lectures. A friend in the US persuaded him to take out a US patent on his detector, but he did not actively...

physicist Ferdinand Braun's crystal detector in 1874 and Indian physicist Jagadish Chandra Bose's radio crystal detector in 1901. The first silicon semiconductor...

as a mineral detector in radio receivers, and is still used by crystal radio hobbyists. Until the vacuum tube matured, the crystal detector was the most...

semiconductor detectors, an electric field is applied to the detector volume. An electron in the semiconductor is fixed in its valence band in the crystal until...

for wireless telegraphy, such as the Fleming valve (1904) and the crystal detector (1906) also proved able to rectify AM signals, so the technological...

a rectifying detector such as a crystal detector or electrolytic detector, along with the radio signal from the antenna. In the detector the two signals...

the point-contact crystal detector (cat's whisker detector), which was used as a demodulator in the first early radio receivers, crystal radios before powered...

obsolete technology, the point contact crystal detector (cat whisker detector) which was used as a demodulator in crystal radios around the turn of the century...

(from Greek: pyr (πυρ), "fire" and electricity) is a property of certain crystals which are naturally electrically polarized and as a result contain large...

of detectors including coherers, barretters, and crystal detectors. The most popular crystal detector consisted of a small piece of galena crystal probed...

receiver, as well as the first waveguide, horn antenna and semiconductor crystal detector In November 1895 at a public demonstration at the Town Hall of Kolkata...

circuits were both tunable by variable capacitance and inductance. A crystal detector (Type DC-1) and telephone circuit were connected to the secondary circuit...

magnetron. Adding to their problems was the lack of a suitable rugged crystal detector, which was the only system able to reliably detect these high frequency...

A phase detector or phase comparator is a frequency mixer, analog multiplier or logic circuit that generates a signal which represents the difference in...

coaxial line) in which a small sensing antenna which is part of a crystal detector or detector is placed in the electric field in the line. The voltage induced...