CS4398 evaluation board schematic - Values for R and C's marked with "NO POP"

Groundloops · 5th April 2011, 08:46 AM

I'm about to build a balanced output stage for a CS4398. Inevitably I came across the evaluation board schematic which is all intelligible, but I have no clue what the values for the resistor and capacitors marked with "NO POP" should be. Someone with a clue here? Can they simply be omitted?

alexcp · 5th April 2011, 09:43 AM

"no pop" means "not populated" - that is, the schematic and the PCB have the space for these components, but they are not installed. It doesn't make sense to install a cap in parallel to a zero ohm resistor...

digits · 5th April 2011, 09:54 AM

The whole universe was created the last time someone made the laws of physics try to divide by zero.
So, have you started listening to these yet? How would you say they compare to similar products?

Groundloops · 5th April 2011, 10:36 AM

Quote:

It doesn't make sense to install a cap in parallel to a zero ohm resistor...

Ehm ... Obiviously!

Quote:

The whole universe was created the last time someone made the laws of physics try to divide by zero.

Go for "transreal numbers":
BBC - Berkshire - Features - 1200-year-old problem 'easy'

JensH · 5th April 2011, 11:55 AM

If you replace the 0ohm resistor with another value, e.g. 634ohm, you can use R43 to get a differential gain. With the components not populated there will be no gain, just buffering and low pass filtering. The capacitors can be used to control the gain at high frequencies.

5th April 2011, 08:46 AM	#1
Groundloops I´m amazed! diyAudio Member Join Date: May 2004 Location: Hamburg / Northern Germany	CS4398 evaluation board schematic - Values for R and C's marked with "NO POP" I'm about to build a balanced output stage for a CS4398. Inevitably I came across the evaluation board schematic which is all intelligible, but I have no clue what the values for the resistor and capacitors marked with "NO POP" should be. Someone with a clue here? Can they simply be omitted?

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5th April 2011, 09:43 AM	#2
alexcp diyAudio Member Join Date: Jun 2009 Location: Florida Blog Entries: 28	"no pop" means "not populated" - that is, the schematic and the PCB have the space for these components, but they are not installed. It doesn't make sense to install a cap in parallel to a zero ohm resistor...

5th April 2011, 09:54 AM	#3
digits diyAudio Member Join Date: Apr 2011	The whole universe was created the last time someone made the laws of physics try to divide by zero. So, have you started listening to these yet? How would you say they compare to similar products?

5th April 2011, 11:55 AM	#5
JensH diyAudio Member Join Date: Jul 2009	If you replace the 0ohm resistor with another value, e.g. 634ohm, you can use R43 to get a differential gain. With the components not populated there will be no gain, just buffering and low pass filtering. The capacitors can be used to control the gain at high frequencies.

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