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component, a crystal detector, originally made from a piece of crystalline mineral such as galena.: 7-9  This component is now called a diode. Crystal radios...

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

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

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

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...

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...

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

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

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

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

radioactivity in small samples. It usually employs a sodium iodide crystal detector. It was invented in 1951 by Hal Anger, who is also well known for inventing...

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

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

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...

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

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

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

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...

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...

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...

The Crystal Ball was a hermetic particle detector used initially with the SPEAR particle accelerator at the Stanford Linear Accelerator Center beginning...

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...

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...

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

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...

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...

used the audion tube as the active element. Unlike a crystal detector or Fleming valve detector, the audion provided amplification of the signal as well...