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Overview
Noise
Analysis Option is
the industry’s first
comprehensive noise analysis
tool. Part of the Analog
FastSPICE
unified circuit
verification platform, Noise
Analysis Option
includes full transistor-level transient and periodic noise analysis
for
every type of complex analog and RF circuit, including all ADCs, PLLs,
DC:DC
converters, frequency synthesizers, and VCOs. The tool is
fully compatible
with existing flows, produces true SPICE accurate results, and is
silicon
proven.
Transient
Noise Analysis Key Features
- True
SPICE
accuracy
- 5x-10x
faster
than any other tool
- 5x-10x
higher
capacity than any other tool
- Analyzes
white
noise and flicker noise
- Supports
standard netlist, model, and output formats
- Full
integration in the leading EDA design environment
Transient Noise
Analysis
Target
Applications
- ADCs
(sigma-delta, pipelined, video, etc.)
- DACs
- PLLs
(integer-N and fractional-N)
- Full
transmit
and receive chains
- Frequency
synthesizers
Transient
Noise
Analysis Technology & Use Model
Transient
noise analysis is a universal approach to device noise analysis. It
injects
random noise for each device noise source at each timestep during
transient
simulation to produce output waveforms that include realistic noise
effects.
Post-processing the noisy waveforms translates the noise effect to the
frequency domain.
ADC Power
Spectral Density (dB) vs. Frequency (Hz)
Transient
noise analysis is valid for all types of circuits and is the only
transistor-level noise analysis technique for non-periodic circuits
such as
sigma-delta ADCs and frac-N PLLs. Although some traditional SPICE
simulators
have offered transient noise analysis, the runtimes are so long that
the
analysis is infeasible for even moderately-complex blocks.
Because
this technique is built on transient simulation, the underlying circuit
simulator accuracy and performance is critical. Noise
Analysis Option utilizes the
Berkeley Design Automation Analog
FastSPICE circuit simulator to
provide true SPICE accuracy 5x-10x faster and with a 5x-10x higher
capacity
than
transient noise analysis based on traditional SPICE engines.
Noise
Analysis Option
transient noise
analysis is very straightforward to use. It utilizes industry-standard
netlists and models, is fully integrated into the leading EDA
design environment, and requires the addition of only 1-2 parameters to
a
standard
transient simulation. It produces the same standard output file formats
as Analog
FastSPICE and includes
sophisticated post-processing capabilities.
For more information please see the Efficient
Noise Analysis for Complex Non-Periodic Analog/RF Blocks
white paper
Periodic
Noise Analysis Key Features
- Periodic
steady-state (PSS) convergence with up to 50,000 element capacity
- Periodic
noise
(PNOISE) analysis with no accuracy or performance tradeoff
- 5x-10x
faster
than any other tool for complex circuits
- Oscillator
phase noise (OSCNOISE) analysis with unmatched accuracy (full
stochastic nonlinear analysis)
- OSCNOISE provides
node and device noise contribution and impulse sensitivity
function (ISF) information for every node.
- Periodic
small
signal analysis (PAC, PXF)
- Supports
standard netlist, model, and output formats
- Full
integration in the leading EDA design environment
Periodic
Noise Analysis
Target
Applications
- >1
GHz,
nanometer-scale, CMOS circuits
- Complete
transmit and receive chains
- Complex
LNA +
mixer circuits, including switching mixers
- Power
amplifiers (PAs), including digitally modulated and distributed PAs
- Frequency
dividers with up to 12 bits
- VCOs
(ring-oscillator, LC-tank) including bias and amplifier circuits
- Highly
nonlinear and high-Q crystal oscillators with limiters
Periodic
Noise Analysis Technology and Use Model
Periodic noise analysis (PNOISE) computes the noise of
periodically-driven circuits such as mixers, switched-capacitor
filters, phase detectors, charge pumps, and dividers. PNOISE analysis
is faster than transient noise analysis for these types of circuits and
provides additional diagnostic information such as noise source
contributions.
Oscillator
noise analysis (oscnoise/vconoise) computes the phase noise of periodic
autonomous circuits such as VCOs (LC-tank and ring-oscillator circuits)
and crystal oscillators. Oscillator noise analysis is faster than
transient noise analysis for this type of circuit and, like periodic
noise analysis, can provide noise source contributions.
The
Berkeley Design Automation Noise Analysis Option is based on the
company’s award winning RF FastSPICE periodic analysis
technology. The tool has superior PSS convergence that easily handles
circuits that are far too complex for any other tool – up to
50,000 elements. It is the only tool in the industry that always
provides true SPICE accuracy with no performance tradeoff. It provides
accuracy equivalent to an infinite number of sidebands in other RF
simulators and provides 5x–10x higher performance for circuits
that would otherwise need >100 sidebands.
The
periodic analysis technology delivers superior periodic steady-state
(PSS) convergence and fast and accurate RF periodic analysis. The tool
includes the company’s Stochastic Nonlinear Engine™, which
enables fast and accurate analysis of the nonlinear, time-varying
behavior of complex VCOs and crystal oscillators. The result is
unmatched PSS convergence and noise analysis accuracy. Noise Analysis
Option also provides comprehensive noise contributor and sensitivity
data, which designers use to confidently optimize their designs for low
noise.
The
Noise Analysis Option oscillator noise analyses (oscnoise, vconoise)
provides superior results for complex VCOs and crystal oscillators. It
is the only such analysis in the industry based on a full stochastic
nonlinear analysis that does not make any approximations. Hence it
delivers true SPICE accuracy for every run. In addition to providing
contribution information for every run, it also uniquely provides
Impulse Sensitivity Function (ISF) information for every node and every
run – automatically, with no user interaction or simulation
overhead.
Noise
Analysis Option
periodic noise
analysis uses industry standard
netlists and models and is
fully integrated into the leading EDA design environment.
It
produces standard output file
formats and
includes
sophisticated post-processing and analysis capabilities.
Feature
Summary
- Analyses:
- Periodic
analyses: PSS, OSCPSS, VCOPSS, PNOISE, OSCNOISE, VCONOISE, PAC, PXF
- Netlist
compatibility
- Compatible
with industry-standard SPICE
netlists
- VCD
for simulation stimulus
- Model
support
- Gummel-Poon,
HICUM, Mextram, VBIC
- BSIM3,
BSIM4, BSIMSOI, MOS11, PSP
- MOS1,
JFET, Diode, Juncap
- Verilog-A,
s-parameter, w-element
- Outputs
- PSF
ASCII, PSF binary, tr0, FSDB
- Nutmeg
ASCII, Nutbin, Nutbinf
- Integration
- Leading
custom design environment
- Waveform
viewer
- WaveCrave™
waveform processor
- Operating
Systems
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