voitto
Well-known member
Hi there,
I'm attempting to design a 2.5k bridged-T attenuator to act as a volume control, I made an excel spreadsheet based on the equations presented here - https://www.electronics-tutorials.ws/attenuators/bridged-t-attenuator.html
The problem I'm having is that while the figures from this spreadsheet seem to match up with other online bridged-T calculators, when I ran it through a spice simulation the attenuation figures don't match.
I've attached the spreadsheet and a spice screenshot. If anyone has the time to look this over and point out where I'm going wrong i'd be very grateful.
The final volume control will be either a rotary switch or a relay stepped thing, so the values used in series will differ, this excel sheet is just an attempt to understand it.
Excel file and spice screenshot here - https://www.dropbox.com/sh/foebqw6y2oxw6yj/AACJ4I-lAhPawuILHLIV_CWYa?dl=0
Best,
Robin
I'm attempting to design a 2.5k bridged-T attenuator to act as a volume control, I made an excel spreadsheet based on the equations presented here - https://www.electronics-tutorials.ws/attenuators/bridged-t-attenuator.html
The problem I'm having is that while the figures from this spreadsheet seem to match up with other online bridged-T calculators, when I ran it through a spice simulation the attenuation figures don't match.
I've attached the spreadsheet and a spice screenshot. If anyone has the time to look this over and point out where I'm going wrong i'd be very grateful.
The final volume control will be either a rotary switch or a relay stepped thing, so the values used in series will differ, this excel sheet is just an attempt to understand it.
Excel file and spice screenshot here - https://www.dropbox.com/sh/foebqw6y2oxw6yj/AACJ4I-lAhPawuILHLIV_CWYa?dl=0
Best,
Robin