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Agilent EEsof EDA Application Note on Tolerance In Surface Mount Varactor Diodes This document is owned by Agilent Technologies, but is no longer kept current and may contain obsolete or inaccurate references. We regret any inconvenience this may cause. For the latest information on Agilent's line of EEsof electronic design automation (EDA) products and services, please go to: www.agilent.com/find/eesof Precision Measurements and Models You Trust APPLICATION NOTE 023 TOLERANCE IN SURFACE MOUNT VARACTOR DIODES The ability to specify tolerance in the nominal capacitance has been added to selected models in the Modelithics Non-Linear Diode (NLD) Model Library in order to emulate the variation typically specified in manufacturer data sheets. The feature will be included in additional models in future library releases. This application note briefly reviews this new capability and provides suggestions on how it should be used. A sample simulation schematic from Agilent's Advanced Design System is shown in Figure 1. Included in the schematic is the VAR_TSH_TG1A_005 model for the Toshiba P/N 1SV280 varactor diode. The model parameter used to specify the capacitance tolerance is Cap_tolerance