# CD4046 (Phase Lock Loop) Based Gated Frequency Generator

##### **NOTE FROM ETHAN CROWDER: This is a simple square wave oscillator, with close to a fixed 50% duty cycle, that utilizes two CD4046 Phase Lock Loop ICs. Four potentiometer connections have been included for each IC, that allows very precise frequency control. I've use four 10-Turn precision potentiometers. The CD4046's are supplied 12V. This was chosen for easier integration with more modern N-CH MOSFETS, which typically require a gate voltage of 10V minimum for full turn on.** 

##### **PCB Gerber .ZIP Folder: [PLL Gated Frequency Generator Gerbers.zip](https://stanslegacy.com/attachments/322)**

[![image-1767272306422.png](https://stanslegacy.com/uploads/images/gallery/2026-01/scaled-1680-/KbJEAZOvh7mnnwOb-image-1767272306422.png)](https://stanslegacy.com/uploads/images/gallery/2026-01/KbJEAZOvh7mnnwOb-image-1767272306422.png)

[![image-1767272321882.png](https://stanslegacy.com/uploads/images/gallery/2026-01/scaled-1680-/GC5kK0d1LivEwJJ6-image-1767272321882.png)](https://stanslegacy.com/uploads/images/gallery/2026-01/GC5kK0d1LivEwJJ6-image-1767272321882.png)