How to install a cd phase switch

jimmyinhawaii · 17th February 2004, 06:46 AM

Hi
I read some old message that teach how to install a phase switch for cd player.
It talk about the INV pin on the dac,what is the inv pin stand for and how to find the 0v and 5v.
Jimmy

Klaus · 17th February 2004, 01:50 PM

Hi Jim,

INV pin means the switched pin to activate the inverted phase mode of the DAC. At some older DAC ICs this was realized to use this DACs in full symmetrical applications. Check the datasheet of your DAC if this pin is available and how to switch. 0V and 5V would be like ground and V_supply – but check datasheet.

Most newer DACs have no more INV mode, therefore they frequently have symmetrical outputs. Here one Inv-relay can solve the issue. I realized one INV-relay at my Aleph P1.7 preamp, so each signal source can be inverted.

Regards

Klaus

jimmyinhawaii · 18th February 2004, 07:19 AM

Hi Klaus,
Thanks for the reply,is it ok to draw out a full circuit how to use a relay to made a phase switch.
Thanks
jimmy

Klaus · 18th February 2004, 12:30 PM

Hi Jim,

Use a relay with two times change-contact, if you know what I mean. Connect it like shown.

I placed my inv-relay right in front of the input coupling cap of my Aleph P1.7 preamp. It works perfect!

Regards

Klaus

17th February 2004, 06:46 AM	#1
jimmyinhawaii diyAudio Member Join Date: Feb 2004 Location: Hawaii	How to install a cd phase switch Hi I read some old message that teach how to install a phase switch for cd player. It talk about the INV pin on the dac,what is the inv pin stand for and how to find the 0v and 5v. Jimmy

18th February 2004, 07:19 AM	#3
jimmyinhawaii diyAudio Member Join Date: Feb 2004 Location: Hawaii	cd phase switch again Hi Klaus, Thanks for the reply,is it ok to draw out a full circuit how to use a relay to made a phase switch. Thanks jimmy

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17th February 2004, 01:50 PM	#2
Klaus diyAudio Member Join Date: May 2002 Location: near Frankfurt/Main	Hi Jim, INV pin means the switched pin to activate the inverted phase mode of the DAC. At some older DAC ICs this was realized to use this DACs in full symmetrical applications. Check the datasheet of your DAC if this pin is available and how to switch. 0V and 5V would be like ground and V_supply – but check datasheet. Most newer DACs have no more INV mode, therefore they frequently have symmetrical outputs. Here one Inv-relay can solve the issue. I realized one INV-relay at my Aleph P1.7 preamp, so each signal source can be inverted. Regards Klaus