what does a dotted line to ground mean on schematic?

AltecDarpa · 18th April 2010, 03:12 AM

Hello, I am building a small amp on perf/bread board using NJM2073d in stereo mode, and the schematic has dotted lines coming from a capacitor on each output channel going to ground, does this mean I am supposed to join these grounds together separate from the other grounds in the circuit?

its on page 4 of the data sheet.
NJM2073D pdf, NJM2073D description, NJM2073D datasheets, NJM2073D view ::: ALLDATASHEET :::

thanks for any help

c2cthomas · 18th April 2010, 04:24 AM

The use of dashed lines in schematics usually indicates an optional component(s) or connection. In this case the inclusion of a capacitor and resistor to control oscillation of this amplifier working in conjunction with certain speaker loads.

NJM2073D pdf, NJM2073D description, NJM2073D datasheets, NJM2073D view ::: ALLDATASHEET :::
page 5-40

Hope this helps

AltecDarpa · 18th April 2010, 04:32 AM

Thanks for clearing that up. it shows the bridged circuit in the oscillation blurb, I wasn't sure if it was the same for the stereo circuit, I am still a noob, lol

thanks again.

18th April 2010, 03:12 AM	#1
AltecDarpa diyAudio Member Join Date: Jun 2008	what does a dotted line to ground mean on schematic? Hello, I am building a small amp on perf/bread board using NJM2073d in stereo mode, and the schematic has dotted lines coming from a capacitor on each output channel going to ground, does this mean I am supposed to join these grounds together separate from the other grounds in the circuit? its on page 4 of the data sheet. NJM2073D pdf, NJM2073D description, NJM2073D datasheets, NJM2073D view ::: ALLDATASHEET ::: thanks for any help

18th April 2010, 04:24 AM	#2
c2cthomas 49 - for the 17th time diyAudio Member Join Date: Oct 2006 Location: Near "Music City" (Nashville Tennessee)	The use of dashed lines in schematics usually indicates an optional component(s) or connection. In this case the inclusion of a capacitor and resistor to control oscillation of this amplifier working in conjunction with certain speaker loads. NJM2073D pdf, NJM2073D description, NJM2073D datasheets, NJM2073D view ::: ALLDATASHEET ::: page 5-40 Hope this helps __________________ DIY audio can be expensive – but getting to see things go up in smoke - that's priceless!!!! ..... "whatever - call it brainfart of Mighty ZM"

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18th April 2010, 04:32 AM	#3
AltecDarpa diyAudio Member Join Date: Jun 2008	Thanks for clearing that up. it shows the bridged circuit in the oscillation blurb, I wasn't sure if it was the same for the stereo circuit, I am still a noob, lol thanks again.