# ADS Equations ![](attachments/Pasted%20image%2020220927171354.png#invert) [^1] --- 2022-09-29 12:24 ## Voltage Divider Example You need to measure any components you want to use in the simulation using a 'MeasEqn' (from S-param tab): ![](attachments/Pasted%20image%2020220929123325.png#invert) This can then allow you to use these values in an equation: ![](attachments/Pasted%20image%2020220929123249.png#invert) [^2] ## Low Pass Filter Example ![](attachments/Pasted%20image%2020220929151431.png#invert) ![](attachments/Pasted%20image%2020220929151408.png#invert) As can be seen, the low pass filter characteristic is clearly displayed. A measurement of the ## Writing Equations on the Schematic Use a MeasEqn to write the equation. Can even write s! Equation based on the passive s-parameters. Example: 50x50 s-parameters - write in a text editor first - textpad - very good. --- # References [^1]: [Equations - ADS 2009 - Keysight Knowledge Center](https://edadocs.software.keysight.com/display/ads2009/Equations) [^2]: [Dr. Mühlhaus Consulting & Software GmbH » Using Equations and User Defined Functions in ADS (muehlhaus.com)](https://muehlhaus.com/support/ads-application-notes/functions-in-ads)