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Regarding QRV07

Started by goldkenn, June 15, 2010, 09:19:33 AM

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goldkenn

As quoted in The schematics section:
"..... This IC is designed to be used with low impedance signal sources ....."
If in case the source is not a line out, but a headphone out such as a MP3 player, will that let the signal direct inout to TPA6120 better then via the buffer?

peranders

#1
Headphone out is typical 100 ohms and is "low" in this context.

Better with buffer? Can't tell really.
/Per-Anders Sjöström, owner of this forum

Homepage with my DIY hifi stuff

goldkenn

Maybe I add a selector, with buffer for line level in via RCA socket, withoput buffer, direct feed to TPA6120, as headphone in with a 3.5mm socket.

peranders

Notice that the input currents of the TPA6120 is around 12 uA and this may create offsets (clicks and thumps in the earphone) if the input is DC coupled.
/Per-Anders Sjöström, owner of this forum

Homepage with my DIY hifi stuff

goldkenn

For BR1/BR2, did MB6S work fine? I can't find DSF04 or any SMD type rectifier except MB6S

goldkenn

By the way, also the transformer, I found nothing from RS, did Farnell have the transformer?

peranders

/Per-Anders Sjöström, owner of this forum

Homepage with my DIY hifi stuff