秋天
发表于 2013-10-7 12:48:22
:):):)。。。。。。。。
herosyfj
发表于 2013-10-7 14:40:09
楼上灌水!!
chrischan1911qq
发表于 2013-10-20 23:29:53
I don't think so.Differential output normally can deliver a better S/N.
herosyfj
发表于 2013-10-21 00:06:58
chrischan1911qq 发表于 2013-10-20 23:29
I don't think so.Differential output normally can deliver a better S/N.
谢谢大侠指点!
我对您回帖的理解是:
CSR8645 datasheet中的speaker电路不可以直接用在蓝牙耳机上。我的理解对吗?
再请教“S/N”是什么意思?
chrischan1911qq
发表于 2013-10-21 10:18:16
I'm sure you can connector 32 ohm drivers directly to CSR8645's pins SPKR_LP/LN and SPKR_RP/RN.The reason to use 32 ohm drivers is the current driving capability of CSR8645 is not high enough to driver low impedance drivers such as 4 or 8 ohm.
You may notice all highly integrated IC use differential signal within the IC, both in RF section and audio section.Differential signal pair has high rejection to common mode noise.
S/N = Signal to Noise ratio
LXQ
发表于 2013-10-21 11:36:59
学习。。。。
in0501
发表于 2013-10-21 11:50:34
芯片应用电路出来的是差分信号,如果产品要求不高,可以直接输出接耳机喇叭,喇叭阻抗在16或32 欧为宜,太高驱动不了。
如果耳机产品要求很高,最好是加一个耳机小功放芯片转成单端信号输出到喇叭上,按需要的功率与喇叭阻抗来选择芯片型号就是了。
herosyfj
发表于 2013-10-25 14:34:05
谢谢各位大侠的指点!
学些了!
慧蓝
发表于 2013-10-25 16:33:35
为什么不可以呢
herosyfj
发表于 2013-10-25 16:42:54
慧蓝 发表于 2013-10-25 16:33
为什么不可以呢
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