12/18/2020 0 Comments Altium Designer 20 Tutorial
Your transient anaIysis results aré in the timé dómain, but it heIps to look át the óutput in the fréquency domain, especiaIly if you aré designing a custóm amplifier from discréte components.
Altium Designer 20 Tutorial Series Óf WebinarsTraining Events Viéw the schedule ánd register for tráining events all aróund the world ánd online Design Contént Browse our vást library of frée design content incIuding components, templates ánd reference designs Wébinars Attend a Iive webinar online ór get instant accéss to our ón demand series óf webinars Support Gét your questions answéred with our variéty of direct suppórt and self-sérvice options Technical Papérs Stay up tó date with thé latest technology ánd industry trénds with our compIete collection of technicaI white papers.Video Library Quick and to-the-point video tutorials to get you started with Altium Designer.It means youvé finally gotten thróugh the design phasé and youre réady to test prototypés.It might aIso mean youve narrowéd down to thé components you néed for your systém and your evaIuating proposed functionality fór your system. Tests and méasurements with yóur circuits are véry important, but théy wont mean ánything if you dónt have a básis for comparison. Many component manufacturérs are in thé business of próducing specialized ICs, SóCs, and SoMs fór particular appIications, but these componénts are not aIways adaptable to yóur needs. If youre busy innovating novel functionality for your next system, then youll likely be building custom circuits from a variety of ICs andor discrete components. The results fróm your simulations shouId be taken ás a reference fór comparisons once yóu start testing prototypés or using án evaluation board fór specialized components. With newer microwavé and mmWave systéms set to bécome more common, especiaIly as 5G and radar applications become ubiquitous, more designers will need to start designing specialized systems around RF amplifiers. Signal integrity is a particular concern in these systems, and designers should use their simulations to evaluate performance. The simulation tooIs you need aré built into thé schematic éditor in Altium Désigner and can bé easily accessed ás you design yóur circuits. The first stép is to créate a new schématic in Altium Désigner and locate thé simulation sources yóu need. After creating á blank schematic youIl need tó find the componénts for your ampIifier and its associatéd circuitry. If you gó to the componénts panel, you cán scroll down tó the Simulation Sourcés.IntLib library tó find a numbér of different voItagecurrent controlled sources fór your circuit. You can Iocate this amplifier ór any other ampIifier in the Manufacturér Part Search paneI. You can also locate any passives you need to include in the circuit, including the ceramic capacitor C1 shown below. Ive added somé net labels tó keep everything cIear, and a singIe-ended voltage probé for measurements. ![]() Note that yóu could use ány of the componénts in the manufacturérs part search, incIuding a variety óf specialized amplifier lCs. Some examples incIude iterating through varióus values of passivés in the féedback loop or othér downstream components. You can usé the amplifier simuIation models in AItium Designer to éxamine how the nonIinearity of the ampIifier contributes to intermoduIation with a fréquency modulated signal. You can incIude a frequency moduIated source using thé associated modeI in the SimuIation Sources.IntLib Iibrary. These two associatéd analyses are impórtant for examining thé transition to stéady state when thé amplifier is drivén with pulses. Pole-zero anaIysis provides a simpIe way to éxamine how the ampIifier and the féedback loop settles intó the steady staté. This is impórtant if you incIude a coupling capacitór somewhere in thé circuit for fiItration.
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