#9604 NORM 1.5-sof: build DC sensor mode on audio driver

Zarro Boogs per Child bugtracker at laptop.org
Thu Dec 3 23:53:56 EST 2009


#9604: build DC sensor mode on audio driver
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           Reporter:  Quozl     |       Owner:  dsd              
               Type:  defect    |      Status:  new              
           Priority:  normal    |   Milestone:  1.5-software-beta
          Component:  kernel    |     Version:  not specified    
         Resolution:            |    Keywords:                   
        Next_action:  diagnose  |    Verified:  0                
Deployment_affected:            |   Blockedby:                   
           Blocking:            |  
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Comment(by Quozl):

 At a 'DC Input Bias'' of 80%, the short circuit current emitted by XO-1.5
 microphone input is 0.732mA, at an open circuit voltage of 2.6V, this
 implies by ohms law an internal series resistance of 3552 ohms.  With ''DC
 Input Bias'' dropped to 50%, the current emitted is 0.442mA, at 1.7V,
 which means 3846 ohms.  Perhaps there is a 3k6 resistor in the path.

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Ticket URL: <http://dev.laptop.org/ticket/9604#comment:12>
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