jkeny wrote: I think in 2014 XMOS incorporated an ARM core so these chips are 200mW on 3.3V which using 2400mAh batteries is fine - about 40 hours from fully charged battery
Some kind of irony eh? 200mW is still a fairly thirsty ARM core but perhaps the clock rate is way high (200MHz or so) ?
Ah, assembly code is not for me - OK in small doses, maybe :)
I consider a few hundred lines a 'small dose' yep. Its definitely not for writing user interfaces in.
jkeny wrote: I think in 2014 XMOS incorporated an ARM core so these chips are 200mW on 3.3V which using 2400mAh batteries is fine - about 40 hours from fully charged battery
Some kind of irony eh? 200mW is still a fairly thirsty ARM core but perhaps the clock rate is way high (200MHz or so) ?
500MIPS but 40 hrs on battery is fine - half that is also fine
Ah, assembly code is not for me - OK in small doses, maybe :)
I consider a few hundred lines a 'small dose' yep. Its definitely not for writing user interfaces in.
Yea, maybe that's borderline OK? :)
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For Digital Audio playback that delivers WHERE the performers are on stage but more importantly WHY they are there.
Yep that schematic's still current - I'd add on a trafo at the output to top it off.
I have made a marginal improvement to the bass with my CFB I/V stage over the single transistor shown there. You can get closer to the CFB performance by adding current sources to the transistor - on my version I think I put a pair of 5mA current sources on to bias the I/V transistor up.
nige2000 wrote:is tda1387 too old to be nxp branded?
It seems Philips was sold in 2006 & became known as NXP - don't know if TDA1387 were still being manufactured in 2006?
Are the DAC chips you received not performing?
www.Ciunas.biz
For Digital Audio playback that delivers WHERE the performers are on stage but more importantly WHY they are there.
