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Per Westermark
02/14/12 05:19
Read: 399 times
Sweden


 
#185926 - Comparator
Responding to: Daniel Contarino's previous message
Yes, AM is amplitude modulation.

But in this case, the transfer isn't analog data with a specific amplitude representing a specific signal value.

It's enough to have a comparator that detects if the demodulated signal is stronger than a reference or not. The time code information is sent at a very low baudrate and with a format to make it easy to implement in a tiny microprocessor with a minimum of external hardware. You don't want battery-consuming extras in a wall clock or even wristwatch that is expected to have 1-5 years of battery life.

List of 14 messages in thread
TopicAuthorDate
Help! Doing a WWVB Radio-Synchronized Clock with MCP3004      Armin Kashahyah      02/10/12 12:46      
   Difficult to find resources...      Daniel Contarino      02/10/12 13:46      
      MCP3004 is a Microchip A/D Converter!!      Andy Neil      02/11/12 05:00      
      We use a peak detector to convert signals from the radio...      Armin Kashahyah      02/11/12 14:25      
         RE: I have no idea how to start      Andy Neil      02/11/12 14:58      
      We use a peak detector to convert signals from the radio...      Armin Kashahyah      02/11/12 14:27      
         Why?      Neil Kurzman      02/13/12 14:47      
            Yes, There is AM!      Daniel Contarino      02/13/12 17:44      
               Ok But      Neil Kurzman      02/13/12 22:57      
               Comparator      Per Westermark      02/14/12 05:19      
   Strong Suggestion        Michael Karas      02/10/12 17:54      
      Is it still available?      Andy Neil      02/11/12 04:42      
         Maybe EOL      Michael Karas      02/11/12 07:10      
   Really??!      Andy Neil      02/11/12 04:39      

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