eldo_user

Simulator Compatibility
Spectre Compatibility Description
Table 5-5. Spectre Constants and Functions (cont.)
Constant/Function Value
m_pi_2 1.57079632679489661923
m_pi_4 0.78539816339744830962
m_1_pi 0.31830988618379067154
m_2_pi 0.63661977236758134308
m_2_sqrtpi 1.12837916709551257390
m_sqrt2 1.41421356237309504880
m_sqrt1_2 0.70710678118654752440
m_degperrad 57.2957795130823208772
p_q
1.6021918×10 −19
p_c 2.997924562×10 8
p_k
p_h
p_eps0
These constants can be used inside all expressions.
Limitations
• The .ALTER command is not supported.
• When Eldo is using a Spectre netlist as input, and the netlist contains an internal node
and a device with the same name, it is impossible for Eldo to distinguish between these.
When Eldo analyses a subcircuit in the Spectre netlist, each element is attempted to be
converted, without knowing if it is a node name or a device name. This can lead to plots
not being performed as expected, because Eldo does not know what kind of plot is
required (I or V for example). For examples, see Spectre Node and Device Names in
“Troubleshooting the Spectre to Eldo Flow” on page 186.
• Spectre RF commands are not supported.
1.3806226×10 −23
6.6260755×10 −34
8.85418792394420013968×10 −12
p_u0
m_pi×4.0×10 −7
p_celsius0 273.15
f_mod(a,b)
{a-b×int((a+0.5)/b)}
atan2(a,b)
{atan(a/b)}
hypot(a,b)
{sqrt(a×a + b×b)}
184
Eldo® User's Manual, 15.3