Cic 12 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. This document works through several examples to show how to use spectrerf to pre dict most of the quantities of interest with switched. Background preparation please read the application note spectre rf workshop, mixer design using spectrerf and your class lecture material and answer the following questions before you attend the lab. Cic 19 setup design environment2 push analyses choose then the window choosing analyses appears. Who has simulated the phase noise of pll by spectrerf. The behavior of this circuit has been widely studied, and the achieved results are compared with expected results to confirm their validity. Switchedcapacitor filters problem with aliasing antialiasing. Ee247 lecture 9 switchedcapacitor filters tradeoffs in choosing sampling rate effect of sample and hold switchedcapacitor network electronic noise switchedcapacitor integrators ddi integrators ldi integrators effect of parasitic capacitance bottomplate integrator topology resonators. Predicting the phase noise and jitter of pllbased frequency synthesizers introduction 4 of 52 the designers guide community also rules out any pll that is implemented wi th a phase detector that has a dead zone.
Pdf jitter measurements using spectrerf application note. Save statement to store the operating point node voltages in a. Load statement to restore the operating point values from the ic file for subsequent. For more information about rf theory, see spectrerf theory.
Power amplifiers, or pas, are a part of the transmitter frontend used to amplify the transmitted signal so the signal can be received and decoded. For queries re garding cade nces tradema rks, contact the corporate legal department at the addres s s hown above or call 800. Perturbation based measurements appnote and database. Dc initialization and point analysis performing initialization and analysis starhspice manual, release 1998. Example measurements using spectrerf the lna measurements described in the following labs are calculated using spectrerf in the analog design environment. Spectrerf ohio distortion signal electrical engineering.
Features claimed for the tool include noise analysis, modeling of nonideal components, distortion analysis, and modeling of periodic timevarying circuits in general, not just switched capacitor circuits. See the model reuse section on page 10 for further details on this file. They contain different parts and you are free to use them in your stream in whole or in part. Spectrerf is an option to the spectre circuit simulator from cadence design systems. Finally, enabletone2 turns on the second tone by setting its amplitude to 1. For queries regarding cadences trademarks, contact the corporate legal department at the address shown above or call 18008624522.
As the industrys leading solution for accurate analog simulation, the cadence spectre simulation platform contains multiple solvers to allow a designer to move easily and seamlessly between circuit, block, and systemlevel simulation tasks. Virtuoso spectre circuit simulator rf analysis user guide. Virtuoso spectre circuit simulator rf analysis user. All other trademarks are the property of their respective holders. The ddr phy ip is engineered to quickly and easily integrate into any systemonchip soc, and is verified with the denali ddr controller ip as part of a complete memory subsystem solution. And my design of the pll is used for clock generator in mcu. Hidden state in spectrerf hidden state in spectrerf the designers guide community 3 of 14 of builtin models that everybody has grown to expect from a spiceclass simulator such as spectre. Hidden state in spectrerf hidden state in spectrerf the designers guide community 3 of 14 of builtin models that everybody has grown to. For queries regarding cadences trademarks, contact the corporate legal department at the address shown above or call 800. Specification for 90nm generic process design kit gpdk090. Key in the values as right and push ok, then some information will appear in the analyses domain of the window affirma analog circuit design environment. Tsek03 integrated radio frequency circuits 2018ted johansson 426 2. Cadence product virtuoso spectre circuit simulator rf analysis, described in this document, is.
Its environment is built on the virtuoso system design platform and incorporates new codesign capabilities for simultaneous editing of the ic and sip module, multiple electromagnetic em analysis solvers to give designers different methods of physical extraction that can easily be entered back into. Oscillator noise analysis in spectrerf back closepage 1 close oscillator noise analysis in spectrerf the procedures described in this application note are deliberately broad and generic. Mix and match, use just a few, or use them all, it is up to you. Virtuoso spectre circuit simulator rf analysis user guide product version 6. For more information, refer to page 193195 of oceanref. Right now for example, i can save waveforms from my simulation as table, and then open them in matlab. The cadence spectre rf option is the golden reference for analysis of oscillator phase noise.
For queries regarding cadences trademarks, contact the corporate legal department at the address shown above or call 18004624522. Jitter measurements using spectrerf application note. Cadence contained in this document are attributed to cadence with the appropriate symbol. This application note explains phase noise, tells how it occurs and shows how to calculate phase noise using spectrerf. Matlab crashing with spectrerf toolbox cadence community.
Analog mixed signal group wiki writing cadence ocean scripts. For full documentation on ocean script syntax and commands open the manual here. Affirma rf simulator spectrerf user guide simulating mixers april 2001 146 product version 4. Accelerated parallel simulator aps, provides a set of comprehensive rf analyses. Spectre rf option includes two productionproven simulation engines. My main concern is the oscillating frequency and amplitude. The ddr phy ip is designed to connect seamlessly and work with thirdparty, dficompliant memory controllers. Ee247 lecture 9 university of california, berkeley. The information contained in this document cannot be used in the development of like products or software, whether for internal or external use, and shall not be used for the bene. Virtuoso spectre circuit simulator and accelerated. Hi, im trying to grab the data from my spectre simulations into matlab using the spectrerf toolbox.
Spectre circuit simulator user guide columbia university. Cadence conta ined in this document are attributed to cadence with the appropriate s ymbol. Using the sparameter input file with a spectre rf envlp analysis. Use, duplication, or disclosure by the governme nt is subject to restrictions as set forth in far52. The foundation of the platform is a unified set of technologies shared by all of the enginesthe parser, device models, veriloga behavioral. Spectrerf workshop electrical and computer engineering. It adds a series of analyses that are particularly useful for rf circuits to the. Unfortunately, i have only limited documentation a document by helene thibieroz named using spectre rf noiseaware pll methodology to predict pll behavior accurately and did not manage to extract the required models for the vco and the pfd.
The purpose of this paper is to provide an introductory tour of spectrerf while at the same verifying its simulations by. After going through a lot of forum posts and the matlaban. Hello all, i recently heard about the pll noiseaware design flow and was eager to try it out myself. Modeling and simulation of jitter in phaselocked loops. Later, the alter statement named enabletone1 changes the waveshape type to sine to enable the first tone. The rf signal frequency used for the simulation is around 5001 mhz.
Modeling and simulation of jitter in phaselocked loops ken kundert cadence design systems san jose, california, usa abstract a methodology is presented for predicting the jitter performance of a pll using simulation that is both accurate and efficient. Simulating switchedcapacitor filters with spectrerf. Spectre circuit simulator user guide january 2004 3 product version 5. This document starts off by showing how spectrerf can be applied to predict the performance of a simple trackandhold, which is nothing more than a periodically clocked switch and a capacitor. Predicting the phase noise of pllbased frequency synthesizers phasedomain model 4 of 24 the designers guide community 1. This document provides the specification for the 90nm generic process design kit gpdk090 for future cic product releases 6. If you want to see how spectrerf is run under the analog circuit design environment, read spectrerf help.
Spectrerf appnotes and tutorialsstill one of our best kept secrets. The spectre rf option uses the harmonic balance method to perform frequencydomain, periodic steadystate. Power supply rejection ratio characterization using spectre rf for driven circuits. For more information about using the spectre circuit simulator with veriloga, see the veriloga language reference manual.
The spectrerf noiseaware pll design flow is described in the following document. Simulating switchedcapacitor filters with spectrerf a simple track and hold 4 of 24 the designers guide community fixed value by type dc. Opening the ne600p mixer circuit in the schematic window. Primetime provides different power analysis results for fsdb vs. Tsek03 integrated radio frequency circuits 2018ted johansson 326 2. Well begin our examination of the flow by bringing up the cadence design framework ii environment and look at a full view of our reference design. Simulating switchedcapacitor filters with spectrerf a simple track and hold 6 of 25 the designers guide community now allow the switch to operate so that it is opens and closes with a period of t c with the switch being closed for mt c and open for 1 mt c. May i know how to simulate the output waveform in cadence. Spectrerf has converted the sparameter data to a timedomain description, this file will be used to store the timedomain model so that the interpolation and convertion process, which can be very timeconsuming, does not have to be repeated. A timevariant analysis of the 1f2 phase noise in cmos. The range of interest is baseband output noise from 1.
747 444 50 906 697 402 552 413 406 1253 852 260 158 838 742 514 1678 1579 392 333 1092 232 1466 210 1394 785 826 602