Meter pulse filtering circuit for analog modems

   
   

A filtering circuit is described for filtering out meter pulses of analog telephone communication, for example in analog modems. The circuit is mainly composed of resistors and capacitors and is configured as a double T element or a Wien bridge circuit. The filtering circuit is needed for attenuating interferences to such an extent that integrated circuits operating with low voltages are not overloaded.

Un circuito de filtración se describe para filtrarse fuera de pulsos de metro de la comunicación análoga del teléfono, por ejemplo en módems análogos. El circuito se compone principalmente de resistores y de condensadores y se configura como un elemento doble de T o circuito de puente de Wien. El circuito de filtración es necesario para interferencias atenuantes hasta tal punto que los circuitos integrados que funcionan con bajas tensiones no se sobrecargan.

 
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