Built-in Mathematical and Physical Constants (constants)
Description
Spectre supports the following list of built-in mathematical and physical constants:
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M_E
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2.7182818284590452354
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exp(1) = e
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M_LOG2E
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1.4426950408889634074
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log2(e)
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M_LOG10E
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0.43429448190325182765
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log10(e)
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M_LN2
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0.69314718055994530942
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ln(2)
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M_LN10
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2.30258509299404568402
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ln(10)
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M_PI
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3.14159265358979323846
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pi
|
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M_TWO_PI
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6.28318530717958647652
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2 * pi
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M_PI_2
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1.57079632679489661923
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pi/2
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M_PI_4
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0.78539816339744830962
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pi/4
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M_1_PI
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0.31830988618379067154
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1/pi
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M_2_PI
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0.63661977236758134308
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2/pi
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M_2_SQRTPI
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1.12837916709551257390
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2/sqrt(pi)
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M_SQRT2
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1.41421356237309504880
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sqrt(2)
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M_SQRT1_2
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0.70710678118654752440
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sqrt(1/2)
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M_DEGPERRAD
|
57.2957795130823208772
|
number of degrees per radian
|
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P_Q
|
1.6021918e-19
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charge of electron in coulombs
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P_C
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2.997924562e8
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speed of light in vacuum in meters/sec
|
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P_K
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1.3806226e-23
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Boltzmann’s constant in joules/Kelvin
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P_H
|
6.6260755e-34
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Planck’s constant in joules*sec
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P_EPS0
|
8.85418792394420013968e-12
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permittivity of vacuum in farads/meter
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P_U0
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(4.0e-7 * M_PI)
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permeability of vacuum in henrys/meter
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P_CELSIUS0
|
273.15
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zero Celsius in Kelvin
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These constants can be used in expressions, or anywhere where a numeric value of the expression is expected.
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