Robert Pohl
Encyclopedia
Robert Wichard Pohl was a German
physicist
.
In 1938 Robert Pohl and Rudolf Hilsch, from the University of Göttingen, built the first functioning solid-state
amplifier
using salt as the semiconductor
.
Germany
Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...
physicist
Physicist
A physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena in many branches of physics spanning all length scales: from sub-atomic particles of which all ordinary matter is made to the behavior of the material Universe as a whole...
.
In 1938 Robert Pohl and Rudolf Hilsch, from the University of Göttingen, built the first functioning solid-state
Solid state (electronics)
Solid-state electronics are those circuits or devices built entirely from solid materials and in which the electrons, or other charge carriers, are confined entirely within the solid material...
amplifier
Amplifier
Generally, an amplifier or simply amp, is a device for increasing the power of a signal.In popular use, the term usually describes an electronic amplifier, in which the input "signal" is usually a voltage or a current. In audio applications, amplifiers drive the loudspeakers used in PA systems to...
using salt as the semiconductor
Semiconductor
A semiconductor is a material with electrical conductivity due to electron flow intermediate in magnitude between that of a conductor and an insulator. This means a conductivity roughly in the range of 103 to 10−8 siemens per centimeter...
.
Literary works
- Mechanik, Akustik, Wärme, 1911
- Robert Pohl: Die Physik der Röntgenstrahlen, Habil., Vieweg, Braunschweig, 1912
- Robert Pohl & Peter Pringsheim: Die lichtelektrischen Erscheinungen, Vieweg, Braunschweig, 1914
- Elektrizitätslehre, 1927
- Optik, 1940