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LM317 with heat sink. The LM317 is an adjustable positive linear voltage regulator. It was designed by Bob Dobkin in 1976 while he worked at National Semiconductor. [1] The LM337 is the negative complement to the LM317, which regulates voltages below a reference. It was designed by Bob Pease, who also worked for National Semiconductor. [1]
LM393 differential comparator manufactured by National Semiconductor. The following is a list of LM-series integrated circuits. Many were among the first analog integrated circuits commercially produced since late 1965; [1] some were groundbreaking innovations [opinion]. As of 2007, many are still being used. [2]
Despite these limitations, the band gap voltage reference is widely used in voltage regulators, covering the majority of 78xx, 79xx devices along with the TL431 and the complementary LM317 and LM337. Temperature coefficients as low as 1.5–2.0 ppm/°C can be obtained with bandgap references.
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When added in the proportion required to make these coefficients cancel out, the resultant constant value is a voltage equal to the bandgap voltage of the semiconductor. In silicon , this is approximately 1.25 V. Buried-Zener references can provide even lower noise levels, but require higher operating voltages which are not available in many ...
Flag at half-staff at National Semiconductor on June 21, 2011. Pease was killed in the crash of his 1969 Volkswagen Beetle, on June 18, 2011. [23] [24] [25] He was leaving a gathering in memory of Jim Williams, who was another well-known analog circuit designer, a technical author, and a renowned staff engineer working at Linear Technology.
The National Semiconductor 8250 UART chip, one of the most prolific and most cloned UART chips due to its presence in the first IBM Personal Computer. Peter Sprague, Pierre Lamond and the affectionately called Charlie Sporck worked hand-in-hand, with support of the board of directors to transform the company into a multinational and world-class semiconductor concern.
DataSheets.com is a searchable database of electronic component data sheets and purchasing information. [1] The website is intended for Design engineers and Electronics purchasing agents. [ 2 ] DataSheets.com was developed by UBM in conjunction with SiliconExpert Technologies .