|Class D Switching Power Amplifiers and Power D/A conversion|
Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
||Thread Tools||Search this Thread|
|8th October 2012, 06:10 PM||#1|
Join Date: Oct 2012
Grounding and shielding in B&O ASP1000 module, help wanted!
Just put together an amp based on the B&O ASP1000 module but I'm slightly confused over the B&O grounding and shielding recommendations.
The module heatsink is screwed directly to the chassis side wall (15mm alu) and bottom (3mm alu).
I will use an SE-input (normal RCA cahssis connector) so VI- will be shorted to AGND on the board.
In the datasheet and designers manual it is stated that the low-level AGND and high-level PGND are shorted and then connected to the heatsink via 10kohm//30nf and that the heatsink is connected to the board power connector earth-pin.
So the signal ground is separated from earth by 10kohm//30nf.
Since I've screwed the heatsink directly to the chassis at multiple points I will have a really low ohmic connection between the modules earth pin and the chassis.
So far so good.... but it is also recommended that the low-level input chassis connector ground should be directly connected to the chassis.
This will mean that earth and signal ground are connected together which seems strange to me.
Two more questions:
- I plan to use shielded power cable and plan to use this internally as well. Is it better to use normal twisted cables with a ferrite than the shielded cable?
- I also plan to use shielded loudspeaker cables (shield connected to PGND), so same question as above?
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Wanted a UCD 700 Amp Module unit older type||domtweaker||Swap Meet||0||17th August 2012 02:25 AM|
|B&O ICE Module Problem - ASP1000||jdubs||Class D||3||4th May 2010 06:38 AM|
|Nice article by Tom Van Doren on grounding, shielding and EMC||andy_c||Everything Else||3||4th December 2009 02:02 AM|
|PCM1732U shielding & Grounding||KevinLee||Digital Source||4||1st February 2008 11:21 AM|
|plastic cases and grounding - shielding||then_dude||Solid State||2||13th October 2007 02:15 PM|
|New To Site?||Need Help?|