What kind of analog-to-digital converters are used for the VOICE signal in cell phones... Number of bits? Sampling rate? Architecture? What kind of analog-to-digital converters are used for the RADIO signal in cell phones... Number of bits? Sampling rate? Architecture? What kind of analog-to-digital converters are used for the ACCELEROMETER ETC. signal in cell phones... Number of bits? Sampling rate? Architecture? Jerry
What kind of analog-to-digital converters are used in cell phones?
Started by ●February 1, 2013
Reply by ●February 1, 20132013-02-01
Voice is all sigma-delta types, sampling rates are programmable from 8k to 48K or more, 16 bits or more output, all highly integrated with other functions Bob
Reply by ●February 1, 20132013-02-01
On Friday, 1 February 2013 04:09:10 UTC, Jerry wrote:> What kind of analog-to-digital converters are used for the VOICE signal in cell phones... > > Number of bits? > > Sampling rate? > > Architecture? > > > > What kind of analog-to-digital converters are used for the RADIO signal in cell phones... > > Number of bits? > > Sampling rate? > > Architecture? > > > > What kind of analog-to-digital converters are used for the ACCELEROMETER ETC. signal in cell phones... > > Number of bits? > > Sampling rate? > > Architecture? > > > > JerryIt is not always clear what components are used in mobile phones, but the Samsung Galaxy SII, and the S4 in the UK, I think use the Wolfson Microelectronics WM1181 audio codec hub: http://www.wolfsonmicro.com/documents/uploads/product_briefs/en/WM1811A_ProductBrief.pdf which has 24-bit oversampling ADC and DAC. As Bob said, these devioces now tend to be highly integrated (mixers, EQ, filters, sample rate conversion) and are also typically mixed-signal (analog on the same chip, including Class D power amplifiers). The Galaxy S4 in the USA I think uses the Qualcomm WCD9310 audio codec, with which I am not familiar. Chris ==================== Chris Bore BORES Signal Processing www.bores.com chris@bores.com http://blog.bores.com/ LinkedIn.com/pub/chris-bore/0/612/521
Reply by ●February 1, 20132013-02-01
On Jan 31, 11:09�pm, Jerry <lancebo...@qwest.net> wrote:> What kind of analog-to-digital converters are used for the VOICE signal in cell phones... > Number of bits? > Sampling rate? > Architecture? > > What kind of analog-to-digital converters are used for the RADIO signal in cell phones... > Number of bits? > Sampling rate? > Architecture? > > What kind of analog-to-digital converters are used for the ACCELEROMETER ETC. signal in cell phones... > Number of bits? > Sampling rate? > Architecture? > > JerryAre you trying to understand the architectures or trying to ultimately implement real hardware? If you are trying to implement real hardware what are you thinking of doing?
Reply by ●February 1, 20132013-02-01
On Thu, 31 Jan 2013 20:09:10 -0800 (PST), Jerry <lanceboyle@qwest.net> wrote:>What kind of analog-to-digital converters are used for the VOICE signal in cell phones... >Number of bits? >Sampling rate? >Architecture? > >What kind of analog-to-digital converters are used for the RADIO signal in cell phones... >Number of bits? >Sampling rate? >Architecture? > >What kind of analog-to-digital converters are used for the ACCELEROMETER ETC. signal in cell phones... >Number of bits? >Sampling rate? >Architecture? > >JerryWhich cell phone? There are many different standards and implementations. There's not a single answer to any of those questions, I think, and many implementations are highly integrated and highly proprietary. Eric Jacobsen Anchor Hill Communications http://www.anchorhill.com
Reply by ●February 1, 20132013-02-01
"Jerry" <lanceboyle@qwest.net> wrote in message news:bc0efc73-56ec-4943-a6ca-6ce90527e55f@googlegroups.com...> What kind of analog-to-digital converters are used for the VOICE signal in > cell phones... > Number of bits? > Sampling rate? > Architecture?Typical audio CODEC, ENOB ~ 14, Fsa = 8...48kHz, Delta-sigma> What kind of analog-to-digital converters are used for the ACCELEROMETER > ETC. signal in cell phones... > Number of bits? > Sampling rate? > Architecture?Typical MCU ADC. ENOB ~ 10, Fsa ~ kHz area, Capacitive SAR.> What kind of analog-to-digital converters are used for the RADIO signal in > cell phones... > Number of bits? > Sampling rate? > Architecture?For GSM, they used Delta/Sigma, 270kHz, ENOB ~ 10. It would be interesting to know what is actually ised on the handset side for high speed standards such as LTE. Vladimir Vassilevsky DSP and Mixed Signal Consultant www.abvolt.com
Reply by ●February 2, 20132013-02-02
On Thursday, January 31, 2013 9:38:50 PM UTC-7, radam...@gmail.com wrote:> Voice is all sigma-delta types, sampling rates are programmable from 8k to 48K or more, 16 bits or more output, all highly integrated with other functions > > BobWhat do you suppose is the (worst case) latency of a ADC-DAC combination of these converters? Jerry
Reply by ●February 2, 20132013-02-02
On Friday, February 1, 2013 3:18:46 AM UTC-7, Chris Bore wrote:> On Friday, 1 February 2013 04:09:10 UTC, Jerry wrote: > > It is not always clear what components are used in mobile phones, but the Samsung Galaxy SII, and the S4 in the UK, I think use the Wolfson Microelectronics WM1181 audio codec hub: > > http://www.wolfsonmicro.com/documents/uploads/product_briefs/en/WM1811A_ProductBrief.pdf > > which has 24-bit oversampling ADC and DAC. As Bob said, these devioces now tend to be highly integrated (mixers, EQ, filters, sample rate conversion) and are also typically mixed-signal (analog on the same chip, including Class D power amplifiers). > > The Galaxy S4 in the USA I think uses the Qualcomm WCD9310 audio codec, with which I am not familiar.> Chris >Thanks, Chris. Good stuff. A data sheet on the Qualcomm device seems a little hard to come by, but presumably it is similar to the Wolfson part. Jerry
Reply by ●February 2, 20132013-02-02
On Friday, February 1, 2013 5:43:26 AM UTC-7, brent wrote:> Are you trying to understand the architectures or trying to ultimately > implement real hardware? If you are trying to implement real hardware > what are you thinking of doing?Both. I wish I could say more. :-/ Jerry
Reply by ●February 2, 20132013-02-02
On Friday, February 1, 2013 4:28:48 PM UTC-7, Eric Jacobsen wrote:> On Thu, 31 Jan 2013 20:09:10 -0800 (PST), Jerry > Which cell phone? There are many different standards and > implementations. There's not a single answer to any of those > questions, I think, and many implementations are highly integrated and > highly proprietary. > > Eric Jacobsen >Just looking for ranges of parameters, typical parameters, or even specific examples. Jerry
