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???
11/17/11 16:57
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#184778 - not for commercial use
Responding to: ???'s previous message
However, i was wondering if there is another way to achieve a multi-channel analog output module. Precision and speed are not very critical, as the outputs are supposed to send a speed and/or position signal to a Servo drive to control dampers for Air flow.

This might sound stupid, but i was wondering what if multiple Sample-and-hold amplifiers are used in front of a DAC and the DAC is run at a high speed to output a voltage that is "latched" in a Sample and Hold amp ? Lets say we talk about 8x SnH amps at front of a DA ?

Is this even possible / practical ?


practical, no
smart, no
feasible, no
good, no
legal for commercial use, no


now since you are in farawayistan and do not have access to a full range of components:

IF THIS IS "JUST FOR FUN":

however clumsy and imprecise id possible if your device receiveing the analogs has a reasonably high input impedance use analog switches to switch between caps connected to the high impedance analog inputs.

this would be a reckless approach to a commercial product

Erik


List of 20 messages in thread
TopicAuthorDate
Multiple Analog Outputs.            01/01/70 00:00      
   Don't dismiss single DACs            01/01/70 00:00      
   Resolution/precision            01/01/70 00:00      
      RE: #184777 - Resolution/precision            01/01/70 00:00      
         But is 4k steps needed when you have play?            01/01/70 00:00      
   not for commercial use            01/01/70 00:00      
      RE: #184778 - not for commercial u            01/01/70 00:00      
         how else would you ...            01/01/70 00:00      
            RE: #184782 - how else would you ...            01/01/70 00:00      
         Same-same            01/01/70 00:00      
            RE: #184785 - Same-same            01/01/70 00:00      
               why do you think I said "high input impedance"?            01/01/70 00:00      
      Similar stuff !            01/01/70 00:00      
   State the actual requirement!            01/01/70 00:00      
      RE:#184789 - State the actual requirement!            01/01/70 00:00      
         Still no answer to "need"            01/01/70 00:00      
         No, that is not a requirement!            01/01/70 00:00      
            Very interesting how this always comes up            01/01/70 00:00      
            RE: #184792 - No, that is not a requirement!            01/01/70 00:00      
               Yes, bits matter            01/01/70 00:00      

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