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LTspice subckt model for CD4046 (SED) - VCOala4046.pdf
On Wed, 13 Oct 2010 14:06:25 -0700, Jim Thompson
wrote: Does anyone have a transistor-level schematic of the CD4046 VCO? The datasheets are crocks... can't work as shown. But the general scheme implies that someone did a copy attempt of my vintage (mid '60's) MC4024 core (which was actually current mode). If someone has a working unit, take a snapshot of the voltage across the VCO capacitor. Thanks! ...Jim Thompson I'd expect something like as shown in the attachment. If someone has a real 4046 to measure and can measure all the breakpoint voltages, I can roll a model that will run on most any Spice variant. ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I can see November from my house :-) |
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