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SpectreRF
SpectreRF is an option to the Spectre Circuit Simulator from Cadence Design Systems. It adds a series of analyses that are particularly useful for RF circuits to the basic capabilities of Spectre. SpectreRF was first released in 1996 and was notable for three reasons. First, it was arguably the first RF simulator in that it was the first to be designed for large bipolar and CMOS RF circuits; it used shooting methods as its base algorithm; and it pioneered the use of Krylov subspace methods. The use of shooting methods gave SpectreRF remarkable robustness and the Krylov methods gave it capacity that was roughly 100 times greater than existing simulators at the time. Previously such simulators were designed to simulate very small GaAs integrated circuits and hybrids. These simulators were based on harmonic balance and could reliably simulate circuits with tens of transistors whereas SpectreRF could simulate circuits with thousands of transistors. SpectreRF added the Periodic Stead ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spectre Circuit Simulator
Spectre is a SPICE-class circuit simulator owned and distributed by the software company Cadence Design Systems. It provides the basic SPICE analyses and component models. It also supports the Verilog-A modeling language. Spectre comes in enhanced versions that also support RF simulation (SpectreRF) and mixed-signal simulation (AMS Designer). Specifications List of supported device models * Advanced-node models, including the latest versions of the BSIM CMG, BSIM IMG, and UTSOI models * MOSFET models, including the latest versions of the BSIM3, BSIM4, BSIM Bulk (BSIM6), PSP, and HiSIM * High-voltage MOS models, including the latest versions of the HiSIM HV, MOS9, MOS11, and EKV * Silicon on insulator (SOI), including latest versions of BTASOI, SSIMSOI, BSIMSOI, BSIMSOI PD, and HiSIM SOI * Bipolar junction transistor (BJT) models, including the latest versions of VBIC, HICUM, Mextram, HBT, and Gummel-Poon models * Diode models, including the diode, Phillips level 500, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cadence Design Systems
Cadence Design Systems, Inc. (stylized as cādence), headquartered in San Jose, California, is an American multinational computational software company, founded in 1988 by the merger of SDA Systems and ECAD, Inc. The company produces software, hardware and silicon structures for designing integrated circuits, systems on chips (SoCs) and printed circuit boards. History Origins Cadence Design Systems began as an electronic design automation (EDA) company, formed by the 1988 merger of Solomon Design Automation (SDA), co-founded in 1983 by Richard Newton, Alberto Sangiovanni-Vincentelli and James Solomon, and ECAD, a public company co-founded by Ping Chao, Glen Antle and Paul Huang in 1982. SDA's CEO Joseph Costello was appointed as CEO of the newly combined company. Executive leadership Following the resignation of Cadence's original CEO Joe Costello in 1997, Jack Harding was appointed CEO. Ray Bingham was named CEO in 1999. In 2004, Mike Fister became Cadence's new CEO. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ken Kundert
Kenneth S. Kundert is an engineer that is notable for his work in the area of Electronic Design Automation (EDA). He studied electrical engineering at the University of California, Berkeley under professors Alberto Sangiovanni-Vincentelli and Robert G. Meyer and received his doctorate in 1989. During this time, he created the circuit simulator that eventually became the Advanced Design System from what is now PathWave Design and the Spectre circuit simulator from Cadence Design Systems. Kundert co-foundeDesigner's Guide Consultingand created thDesigner's Guide Community From 1989 to 2005 he was a Fellow at Cadence Design Systems during which time he was the principal architect of the Spectre circuit simulation family. As such, he has led the development of Spectre, SpectreHDL, and SpectreRF. He was also the primary developer of Verilog-A and made substantial contributions to both the Verilog-AMS and VHDL-AMS languages. He has written three books on circuit simulation: The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RF Circuit
Radio-frequency (RF) engineering is a subset of electronic engineering involving the application of transmission line, waveguide, antenna and electromagnetic field principles to the design and application of devices that produce or use signals within the radio band, the frequency range of about 20 kHz up to 300 GHz. It is incorporated into almost everything that transmits or receives a radio wave, which includes, but is not limited to, mobile phones, radios, WiFi, and two-way radios. RF engineering is a highly specialized field that typically includes the following areas of expertise: # Design of antenna systems to provide radiative coverage of a specified geographical area by an electromagnetic field or to provide specified sensitivity to an electromagnetic field impinging on the antenna. # Design of coupling and transmission line structures to transport RF energy without radiation. # Application of circuit elements and transmission line structures in the design of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Krylov Subspace
In linear algebra, the order-''r'' Krylov subspace generated by an ''n''-by-''n'' matrix ''A'' and a vector ''b'' of dimension ''n'' is the linear subspace In mathematics, and more specifically in linear algebra, a linear subspace, also known as a vector subspaceThe term ''linear subspace'' is sometimes used for referring to flats and affine subspaces. In the case of vector spaces over the reals, ... spanned by the images of ''b'' under the first ''r'' powers of ''A'' (starting from A^0=I), that is, :\mathcal_r(A,b) = \operatorname \, \. Background The concept is named after Russian applied mathematician and naval engineer Alexei Krylov, who published a paper about it in 1931. Properties * \mathcal_r(A,b),A\mathcal_r(A,b)\subset \mathcal_(A,b). * Vectors \ are linearly independent until r, where p(A) is the minimal polynomial of A. Furthermore, there exists a b such that r_0 = \deg (A)/math>. * \mathcal_r(A,b) is a cyclic submodule generated by b of the torsion k /mat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harmonic Balance
Harmonic balance is a method used to calculate the steady-state response of nonlinear differential equations, and is mostly applied to nonlinear electrical circuits . It is a ''frequency domain'' method for calculating the steady state, as opposed to the various ''time-domain'' steady state methods. The name "harmonic balance" is descriptive of the method, which starts with Kirchhoff's Current Law written in the frequency domain and a chosen number of harmonics. A sinusoidal signal applied to a nonlinear component in a system will generate harmonics of the fundamental frequency. Effectively the method assumes the solution can be represented by a linear combination of sinusoids, then balances current and voltage sinusoids to satisfy Kirchhoff's law. The method is commonly used to simulate circuits which include nonlinear elements, and is most applicable to systems with feedback in which limit cycles occur. Microwave circuits were the original application for harmonic balance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jacob K
Jacob (; ; ar, يَعْقُوب, Jacob in Islam, Yaʿqūb; gr, Ἰακώβ, Iakṓb), later given the name Israel (name), Israel, is regarded as a Patriarchs (Bible), patriarch of the Israelites and is an important figure in Abrahamic religions, such as Judaism, Christianity, and Islam. Jacob first appears in the Book of Genesis, where he is described as the son of Isaac and Rebecca, and the grandson of Abraham, Sarah, and Bethuel. According to the biblical account, he was the second-born of Isaac's children, the elder being Jacob's fraternal twin brother, Esau. Jacob is said to have bought Esau's Primogeniture, birthright and, with his mother's help, deceived his aging father to bless him instead of Esau. Later in the narrative, following a severe drought in his homeland of Canaan, Jacob and his descendants, with the help of his son Joseph (Genesis), Joseph (who had become a confidant of the pharaoh), moved to Biblical Egypt, Egypt where Jacob died at the age of 147. He is su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ricardo Telichevesky
Ricardo is the Spanish and Portuguese cognate of the name Richard. It derived from Proto-Germanic ''*rīks'' 'king, ruler' + ''*harduz'' 'hard, brave'. It may be a given name, or a surname. People Given name *Ricardo de Araújo Pereira, Portuguese comedian * Ricardo Arjona, Guatemalan singer * Ricardo Arona, Brazilian mixed martial artist * Ricardo Ávila, Panamanian footballer *Ricardo Bralo, Argentine long-distance runner *Ricardo Bueno Fernández, Spanish politician *Ricardo Busquets, Puerto Rican swimmer *Ricardo Cardeno, Colombian triathlete * Ricardo Carvalho, Portuguese footballer *Ricardo Cortez, American actor * Ricardo Darín, Argentine actor *Ricardo (footballer, born 1980), full name Ricardo da Silva, Cape Verdean-Portuguese footballer *Ricardo Faty, Senegalese footballer *Ricardo Fischer, Brazilian basketball player *Ricardo Fortaleza, Filipino-Australian boxer *Ricardo Fuller, Jamaican football (soccer) player * Ricardo A. "Rick" Galindo, American politician *Ric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
