96 lines
3.5 KiB
Plaintext
96 lines
3.5 KiB
Plaintext
// Copyright(c) 2009-2014 Accellera Systems Initiative Inc.
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// 1370 Trancas Street #163, Napa, CA 94558, USA.
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//
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// The material in constants.vams is an essential part of the Accellera Systems
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// Initiative ("Accellera") Verilog-AMS Language Standard. Verbatim copies of
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// the material in this Annex may be used and distributed without restriction.
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// All other uses require permission from Accellera IP Committee
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// (ipr-chair@lists.accellera.org).
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// All other rights reserved
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//
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// Version 2.4.0
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//
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// Mathematical and physical constants
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`ifdef CONSTANTS_VAMS
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`else
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`define CONSTANTS_VAMS 1
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// M_ is a mathematical constant
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`define M_E 2.7182818284590452354
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`define M_LOG2E 1.4426950408889634074
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`define M_LOG10E 0.43429448190325182765
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`define M_LN2 0.69314718055994530942
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`define M_LN10 2.30258509299404568402
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`define M_PI 3.14159265358979323846
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`define M_TWO_PI 6.28318530717958647693
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`define M_PI_2 1.57079632679489661923
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`define M_PI_4 0.78539816339744830962
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`define M_1_PI 0.31830988618379067154
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`define M_2_PI 0.63661977236758134308
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`define M_2_SQRTPI 1.12837916709551257390
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`define M_SQRT2 1.41421356237309504880
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`define M_SQRT1_2 0.70710678118654752440
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// The following constants have been taken from http://physics.nist.gov
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// P_ is a physical constant
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// charge of electron in Coulombs
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`define P_Q_SPICE 1.60219e-19
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`define P_Q_OLD 1.6021918e-19
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`define P_Q_NIST1998 1.602176462e-19
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`define P_Q_NIST2010 1.602176565e-19
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// speed of light in vacuum in meters/second
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`define P_C 2.99792458e8
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// Boltzmann's constant in Joules/Kelvin
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`define P_K_SPICE 1.38062e-23
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`define P_K_OLD 1.3806226e-23
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`define P_K_NIST1998 1.3806503e-23
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`define P_K_NIST2010 1.3806488e-23
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// Planck's constant in Joules*second
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`define P_H_SPICE 6.62620e-34
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`define P_H_OLD 6.6260755e-34
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`define P_H_NIST1998 6.62606876e-34
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`define P_H_NIST2010 6.62606957e-34
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// permittivity of vacuum in Farads/meter
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`define P_EPS0_SPICE 8.854214871e-12
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`define P_EPS0_OLD 8.85418792394420013968e-12
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`define P_EPS0_NIST1998 8.854187817e-12
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`define P_EPS0_NIST2010 8.854187817e-12
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// permeability of vacuum in Henrys/meter
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`define P_U0 (4.0e-7 * `M_PI)
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// zero Celsius in Kelvin
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`define P_CELSIUS0 273.15
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`ifdef PHYSICAL_CONSTANTS_SPICE
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// from UC Berkeley SPICE 3F5
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`define P_Q `P_Q_SPICE
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`define P_K `P_K_SPICE
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`define P_H `P_H_SPICE
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`define P_EPS0 `P_EPS0_SPICE
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`else
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`ifdef PHYSICAL_CONSTANTS_OLD
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// from Verilog-A LRM 1.0 and Verilog-AMS LRM 2.0
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`define P_Q `P_Q_OLD
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`define P_K `P_K_OLD
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`define P_H `P_H_OLD
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`define P_EPS0 `P_EPS0_OLD
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`else
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`ifdef PHYSICAL_CONSTANTS_NIST2010
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`define P_Q `P_Q_NIST2010
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`define P_K `P_K_NIST2010
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`define P_H `P_H_NIST2010
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`define P_EPS0 `P_EPS0_NIST2010
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`else
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// use NIST1998 values as in LRM 2.2 - 2.3 for backwards-compatibility
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`define P_Q `P_Q_NIST1998
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`define P_K `P_K_NIST1998
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`define P_H `P_H_NIST1998
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`define P_EPS0 `P_EPS0_NIST1998
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`endif
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`endif
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`endif
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`endif |