Re: [newtech-1] Smartphone DAC clock frequency

From: Andy
Sent on: Wednesday, December 19, 2012 8:26 PM
Any given smartphone will have given specs for that hardware. You'll need to investigate every revision of every model to know for sure, and implement some sort of abstraction layer for your business logic and control functions. Also, I doubt most smartphone speakers produce frequencies outside limited human hearing range without distortion, given cost limitations vs. intended application and relevant compromises therein.

∞ Andy Badera
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On Wed, Dec 19, 2012 at 7:23 PM, Kshitij <[address removed]> wrote:

May be I could have explained this better. This is a wireless communication link. We want to use the smartphone as an ultrasonic transmitter, while the receiver is made up of custom-designed electronics.

Best,
Kshitij


On Wed, Dec 19, 2012 at 7:58 PM, Andy <[address removed]> wrote:
Entirely depends on the hardware. With the right hardware and driver, sure; driver's probably on you.

Aren't there dedicated components for producing these frequencies that are tested and appropriate for your application?

∞ Andy Badera
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On Wed, Dec 19, 2012 at 6:45 PM, Kshitij <[address removed]> wrote:
Hello Guys,

We are working on a project in which we want to increase the clock frequency of the speaker DAC to beyond 48 kHz. Eventually, we want to be able to transmit (ultra)sound frequencies more than 24kHz. First, is it even possible to control the DAC frequency or it is hardwired to a fixed value ? Second, in case the DAC clock frequency can be controlled, what is the maximum frequency to which it be set. Right now, we are looking at iphone 4S and Samsung S3.

A side note -- I am aware that at higher frequencies, the electronics and not the clock frequency may limit the maximum transmissible (ultra)sonic frequencies. But, for now we are focusing on looking at the effect of DAC clock frequency on maximum (ultra)sound frequency that can be transmitted.

Any inputs will be much appreciated,

Best,
Kshitij


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Kshitij Yadav, PhD.
Udacomm Inc.
New York, NY 10027
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Udacomm.com
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--
Kshitij Yadav, PhD.
Udacomm Inc.
New York, NY 10027
(e) [address removed]
(m) [masked]
Udacomm.com
---
It is a beautiful day to make things, people. Let's have some fun....

--




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