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spectre rf manual
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2014-02-10
15:28:09
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110页
详细描述spectre rf的仿真设置,包含pss,pnoise,sp...等射频IC仿真。
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CIC
1-1
1.SpectreRF Overview
• SpectreRF is an optional feature added to Spectre ,and is
represented by 6 analyses:
1.PSS: Periodic Steady State Analysis
2.PAC: Periodic AC Analysis
3.PXF: Periodic Transfer Function Analysis
4.PNOISE: Periodic Noise Analysis
Tdnoise: Time Domain Noise
QPNOISE: Quasi-Periodic Noise (not discuss here)
5.PDISTO: Periodic Distortion Analysis
QPSS: Quasi-Periodic Steady State (not discuss here)
6.Envelope Analysis (not discuss here)
PAC, PXF, and PNOISE are similar in concept to AC, XF, and Noise.
However, they are applied to periodically-driven circuits such as mixers and
oscillators.
CIC
1-2
SpectreRF in a Design Flow
Schematic
Models
The netlists include all
components along with an
analysis selection, simulation
controls and statements to save,
plot nodes or currents.
Use Direct plot or the
Calculator plot capabilities.
SpectreRF Control
Design
Netlist
Analog Artist Environment
Analog Artist Plot Results
SPECTRE Engine
CIC
1-3
SpectreRF Tool Flow
PSS is a large-signal analysis
and determines the period of
the small-signal analyses.
PSS requires that multiple
periodic stimuli be
coperiodic.
PDISTO is also a large-
signal analysis, and need not
to be run after a PSS
analysis. PDISTO does not
require multiple periodic
stimuli to be coperiodic.
SpectreRF
Spectre Engine
PSS Analysis
PSS setup
PSS Results
PDISTO Results
PDISTO Setup
Spectre Engine
PDISTO Analysis
SpectreEngine
-PAC Analysis
-PXF Analysis
-PNOISE Analysis
Report Results
Stimuli iscoperiodic
Yes
No
CIC
1-4
SpectreRF Features
• Compute a steady-state solution efficiently and directly
• Handles very large circuits (~ 10,000 transistors)
• Displays results in both time and frequency domains
• Use Discrete Fourier Transform (DFT) for better accuracy
• Displays standard RF measurements, such as s-parameter in Smith
chart, NF, IP3, and 1dB compression point in the Analog Artist design
environment.
• Performs oscillator analysis.
CIC
2-1
2.S-Parameter Analysis
• Linear Simulation:
– Entirely in the frequency domain
– A basic RF feature of the Spectre simulator
• Ports:
– Specify the port number on the psin ( or port); psin (or port)
can act as a source port or a load.
– Required properties for linear analysis: Resistance & Port
number
• Noise Analysis:
– UseNfminand NF for 2-port circuits ONLY.
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