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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 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 spanned by the images of ''b'' under the first ''r'' powers of ''A'' (starting from A^0=I) ... 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ken Kundert
Kenneth S. Kundert is an engineer who has done 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-founded Designer's Guide Consulting and created the Designer'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 VHDL-AMS is a derivative of the hardware description language VHDL (IEEE ... [...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). A massively parallel version, Spectre X, was also released to provide performance gains while maintaining the same accuracy as previous Spectre versions. 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) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cadence Design Systems
Cadence Design Systems, Inc. (stylized as cādence)Investor's Business DailCEO Lip-Bu Tan Molds Troubled Cadence Into Long-Term LeaderRetrieved November 12, 2020 is an American multinational corporation, multinational technology and computational software company. Headquartered in San Jose, California, Cadence was formed in 1988 through the merger of SDA Systems and ECAD, Inc., ECAD. Initially specialized in Electronic design automation, electronic design automation (EDA) software for the semiconductor industry, currently the company makes software and Electronic hardware, hardware for designing products such as integrated circuits, System on chip, systems on chips (SoCs), printed circuit boards,The StreeHow Cadence Designs the FutureRetrieved July 21, 2020 and pharmaceutical drugs, also licensing intellectual property for the electronics, aerospace, defense and automotive industries, among others. History 1983–1999 Founded in 1983 in San Jose, California, Cadence Design Systems ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RF Circuit
Radio-frequency (RF) engineering is a subset of electrical engineering involving the application of transmission line, waveguide, antenna, radar, 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, Wi-Fi, 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 ... [...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 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 the concept in 1931. Properties * \mathcal_r(A,b), A\,\mathcal_r(A,b)\subset \mathcal_(A,b). * Let r_0 = \operatorname \operatorname \, \. Then \ are linearly independent unless r>r_0, \mathcal_r(A,b) \subset \mathcal_(A,b) for all r, and \operatorname \mathcal_(A,b) = r_0. So r_0 is the maximal dimension of the Krylov subspaces \mathcal_r(A,b). * The maximal dimension satisfies r_0\leq 1 + \operatorname A and r_0 \leq n. * Consider \dim \operatorname \, \ = \deg\,p(A), where p(A) is the minimal polynomial of A. We have r_0\leq \deg\,p(A). Moreover, for an ... [...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 a linear combination of sinusoids can represent the solution, 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 methods in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jacob K
Jacob, later known as Israel, is a Hebrew patriarch of the Abrahamic religions. He first appears in the Torah, where he is described in the Book of Genesis as a son of Isaac and Rebecca. Accordingly, alongside his older fraternal twin brother Esau, Jacob's paternal grandparents are Abraham and Sarah and his maternal grandfather is Bethuel, whose wife is not mentioned. He is said to have bought Esau's birthright and, with his mother's help, deceived his aging father to bless him instead of Esau. Then, following a severe drought in his homeland Canaan, Jacob and his descendants migrated to neighbouring Egypt through the efforts of his son Joseph, who had become a confidant of the pharaoh. After dying in Egypt at the age of 147, he is supposed to have been buried in the Cave of Machpelah in Hebron. Per the Hebrew Bible, Jacob's progeny were beget by four women: his wives (and maternal cousins) Leah and Rachel; and his concubines Bilhah and Zilpah. His sons were, in order of their b ... [...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 (born 1974), Portuguese comedian *Ricardo Arjona (born 1964), Guatemalan singer *Ricardo Arona (born 1978), Brazilian mixed martial artist *Ricardo Ávila (born 1997), Panamanian footballer * Ricardo Bierhals (born 1990), Brazilian footballer * Ricardo Bralo (1916–?), Argentine long-distance runner * Ricardo Bombine Pimentel (born 1978), Brazilian musician * Ricardo Bueno Fernández (1940-2015), Spanish politician * Ricardo Busquets (born 1974), Puerto Rican swimmer *Ricardo Cardeno (born 1971), Colombian triathlete *Ricardo Carvalho (born 1978), Portuguese footballer *Ricardo Cortez (1900-1977), American actor * Ricardo Darín (born 1957), Argentine actor * Ricardo da Silva (born 1980), Cape Verdean-Portuguese footballer *Ricardo Esgaio, Portu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
