Transcription of Simulating Switched-Capacitor Filters with SpectreRF
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The designer s Guide Communitydownloaded from 2019, Kenneth S. Kundert All Rights Reserved1 of 25 Version 6c, 28 July 2006 SpectreRF provides powerful and unique new analyses that offer designers of Switched-Capacitor Filters the ability to predict the performance of their circuits in ways that werenot previously possible. It allows designers to quickly and directly predict the transferand noise characteristics of Filters described at the transistor level while including all ofthe important second-order effects. Previously, designers had to choose between using atraditional circuit simulator such as SPICE and a discrete-time simulator such as Swit-cap. SPICE simulates from a transistor-level description and so includes all of the desiredsecond-order effects, but is not capable of directly computing the transfer and noisecharacteristics of circuit. While it may be possible to use Spice to indirectly predict suchthings, doing so is difficult, slow, and error prone.
Simulating Switched-Capacitor Filters with SpectreRF A Simple Track and Hold 4 of 25 The Designer’s Guide Community www.designers-guide.org (freq2 = 10.1kHz ampl2 = 0 fundname2 = “input2”).Initially, the waveshape is set to a fixed value by type = dc.Later, the alter statement named enableTone1 changes the waveshape type to sine to enable the first tone.
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