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LSK489
The LSK489 is a monolithic N-Channel JFET designed and built by Linear Integrated Systems, InLIS Inc a Fremont, CA company. The part was introduced in 2013 and was named by EDN Tech as one of the “2013 EDN Hot 100” electronics industry innovations for the year. In a product review published earlier that year, EDN noted: This JFET is part of a family of ultra-low-noise, dual JFET. Part characteristics The LSK489 is an N-channel monolithic dual JFET with 1.8 nV per square root Hz noise at 1 kHz and low-capacitance (Ciss= 4pF). The part is not graded with respect to IDSS, with the typical value being 5 mA, a low of 2.5 mA and a high of 15 mA. Characteristics include: *Tight differential voltage match vs. current; *Improved op amp speed settling time accuracy; *Minimum Input Error trimming error voltage; *Lower intermodulation distortion. The part achieves very low noise with respect to its transconductance, which is attributed to the producer's ability to eliminate al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linear Integrated Systems
Linear Integrated Systems, Inc. (LIS) is an American full-service designer and manufacturer of small-signal, discrete semiconductors. It produces over 2,000 different discrete semiconductors, including dual- and single-junction field effect transistors (JFETs), bipolar transistors, BiFETs, lateral DMOS analog switch and switch arrays, and picoamp dual and single diodes. History LIS was founded in 1987 by Silicon Valley pioneer John H. Hall after his departure from Micro Power Systems. At LIS, Hall continued his research into refractory metal semiconductors and also designed custom integrated circuits (ICs) while developing a line of standard products. Featured among the standard products were improved versions of semiconductors Hall had invented during his years at Union Carbide, Intersil and Micro Power Systems. By the 2000s, LIS had moved away from custom IC work to focus on small-signal, discrete components for use in the test/measurement, medical, high-end audio and sensor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monolithic Integrated Circuit
An integrated circuit (IC), also known as a microchip or simply chip, is a set of electronic circuits, consisting of various electronic components (such as transistors, resistors, and capacitors) and their interconnections. These components are etched onto a small, flat piece ("chip") of semiconductor material, usually silicon. Integrated circuits are used in a wide range of electronic devices, including computers, smartphones, and televisions, to perform various functions such as processing and storing information. They have greatly impacted the field of electronics by enabling device miniaturization and enhanced functionality. Integrated circuits are orders of magnitude smaller, faster, and less expensive than those constructed of discrete components, allowing a large transistor count. The IC's mass production capability, reliability, and building-block approach to integrated circuit design have ensured the rapid adoption of standardized ICs in place of designs using discre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
JFET
The junction field-effect transistor (JFET) is one of the simplest types of field-effect transistor. JFETs are three-terminal semiconductor devices that can be used as electronically controlled switches or resistors, or to build amplifiers. Unlike bipolar junction transistors, JFETs are exclusively voltage-controlled in that they do not need a biasing current. Electric charge flows through a semiconducting channel between ''source'' and ''drain'' terminals. By applying a reverse bias voltage to a ''gate'' terminal, the channel is '' pinched'', so that the electric current is impeded or switched off completely. A JFET is usually conducting when there is zero voltage between its gate and source terminals. If a potential difference of the proper polarity is applied between its gate and source terminals, the JFET will be more resistive to current flow, which means less current would flow in the channel between the source and drain terminals. JFETs are sometimes referred to a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transconductance
Transconductance (for transfer conductance), also infrequently called mutual conductance, is the electrical characteristic relating the current through the output of a device to the voltage across the input of a device. Conductance is the reciprocal of resistance. Transadmittance (or transfer admittance) is the AC equivalent of transconductance. Definition Transconductance is very often denoted as a conductance, , with a subscript, , for ''mutual''. It is defined as follows: : g_\text = \frac For small signal alternating current, the definition is simpler: : g_\text = \frac The SI unit for transconductance is the siemens, with the symbol S, as in conductance. Transresistance Transresistance (for transfer resistance), also infrequently referred to as mutual resistance, is the dual of transconductance. It refers to the ratio between a change of the voltage at two output points and a related change of current through two input points, and is denotated as : : r_\text = \ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siliconix
Siliconix Inc., later Temic Siliconix Inc. was a pioneering American semiconductor company known for its MOSFET designs. Now a subsidiary brand of Vishay, it was founded by Frances and Bill Hugle in 1962. History Siliconix was incorporated on March 5, 1962, by husband and wife Frances and Bill Hugle and Richard Lee. The Hugles were well known in the semiconductor industry for the works of their previous companies that specialized in optical encoding and circuit production, including at the Baldwin Piano Company of Cincinnati, Ohio. Baldwin later gave the Hugles the capital to raise Siliconix in 1962; also contributing startup capital was the Electronic Engineering Company (EECO) of Santa Ana, California. Lee, meanwhile, had previously worked at Texas Instruments before leaving to cofound Siliconix. At Siliconix, the founders focused on field-effect transistor (FET) design and manufacturing while most other companies were still using bipolar junction transistor (BJT) designs. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Large Synoptic Survey Telescope
The Vera C. Rubin Observatory, formerly known as the Large Synoptic Survey Telescope (LSST), is an astronomy, astronomical observatory in Chile. Its main task will be carrying out a synoptic astronomical survey, the Legacy Survey of Space and Time. The word "Wikt:synoptic, synoptic" is derived from the Greek words σύν (syn 'together') and ὄψις (opsis 'view'), and describes observations that give a broad view of a subject at a particular time. The observatory is located on the El Peñón peak of Cerro Pachón, a mountain in Coquimbo Region, in northern Chile, alongside the existing Gemini South and Southern Astrophysical Research Telescopes. The LSST Base Facility is located about away from the observatory by road, in the city of La Serena, Chile, La Serena. The observatory is named for Vera Rubin, an American astronomer who pioneered discoveries about galactic rotation rates. Vera C. Rubin Observatory is a joint initiative of the U.S. National Science Foundation (NSF) an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SLAC National Accelerator Laboratory
SLAC National Accelerator Laboratory, originally named the Stanford Linear Accelerator Center, is a Federally funded research and development centers, federally funded research and development center in Menlo Park, California, Menlo Park, California, United States. Founded in 1962, the laboratory is now sponsored by the United States Department of Energy and administrated by Stanford University. It is the site of the Stanford Linear Accelerator, a 3.2 kilometer (2-mile) linear accelerator constructed in 1966 that could accelerate electrons to energies of 50 GeV. Today SLAC research centers on a broad program in Atomic physics, atomic and solid state physics, solid-state physics, chemistry, biology, and medicine using X-rays from synchrotron radiation and a free-electron laser as well as experimental physics, experimental and theoretical physics, theoretical research in elementary particle, elementary particle physics, accelerator physics, astroparticle physics, and cosmology. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
