eldo_user

Setting Up An Analysis
RF Analyses
commands. This power, formally equivalent to a current source, is dissipated in the thermal
network attached to the thermal net, resulting in a new temperature value of the subcircuit.
The electrothermal simulation results can be sorted based on the thermal contributions. Specify
the .REPORT_HEATING command to generate a report listing the instances or subcircuits that
have seen their temperature change the most during an electrothermal simulation. The results
are generated in the default .chi output file or a dedicated .heat file, and can be filtered and
sorted.
Related Commands
• .TEMPNODE in the Eldo Reference Manual
• .REPORT_HEATING in the Eldo Reference Manual
• .OPTION ETMODE in the Eldo Reference Manual
Related Topics
Electrothermal Simulation
RF Analyses
Eldo RF extends the capabilities of the Eldo simulator with added extensions for RF simulation
to enable the fast large-signal Steady-State analysis (SST analysis) of high frequency electronic
circuits. Eldo RF provides a set of dedicated algorithms to accurately and efficiently handle the
multi-GHz signals in modern wireless communication applications.
Eldo RF capabilities include:
• Steady-State Analysis
Steady-State analysis of RF IC circuits excited with single-tone or multi-tone large
signal sources is easy with Eldo RF. Multi-tone steady-state analysis enables you to
quickly analyze amplifiers, filters, and mixers. Analysis features automate computation
of intermodulation products, compression points, intercept points, and extraction of
large-signal S parameters.
• Steady-State Small-Signal Analysis
A number of small-signal analyses such as the steady-state small signal (SSTAC)
analysis or the steady-state transfer function (SSTXF) analysis complement the steadystate
core algorithm. They are used to easily predict frequency responses when
frequency translation occurs due to a mixing operation for example, and regular small
signal analysis (AC) is not applicable.
• Steady-State Noise Analysis
Steady-state noise analysis determines the output noise spectrum and the noise figure,
with results sorted by the individual contribution of every noisy device. Eldo RF has the
Eldo® User's Manual, 15.3 283