Hi ROBERT.

02-Jan-03 06:02:00, ROBERT SAYRE wrote to JASEN BETTS


 RS>> I've only heard that called a full wave rectifier circuit, but
 RS>> not a push-pull. I've only heard of push-pull in regards to
 RS>> amplifiers. Learn something new every day.

 JB>> It's the same anaolgy between push-pull and bridge amplifiers
 JB>> amplifier output stages, just replace the transistors with
 JB>> diodes. :)

 RS> Push-pull amplifiers and a full-wave rectifier circuit using a
 RS> center-tapped transformer seem similar; but, a bridged
 RS> transformerless amplifier has both amplifiers conducting for 360ø
 RS> whereas a bridge rectifier has individual diodes which are
 RS> conducting for only 180ø.


if you draw them right it works...


   final output stage of
   bridged amplifier.                    Bridge rectifier
    _______________________ +      - _______________________
       |               |                |               |
       |               |                |               |
     |/'               `\|             _|_             _|_
   --|~                 ~|--           \~/             \~/
     |\                 /|             ~T~             ~T~
       |     output    |                |               |
       |-----o    o----|                |-----o AC o----|
       |               |                |               |
     |/'               `\|             _|_             _|_
   --|                   |--           \~/             \~/
     |\,               ,/|             ~T~             ~T~
      ~|               |~               |               |
       |               |                |               |
   ~~~~~~~~~~~~~~~~~~~~~~~~ -     + ~~~~~~~~~~~~~~~~~~~~~~~~


     push pull amplifier               push pull rectifier

          o         o                      o         o
          | output  |                      |  AC     |
          |         |                      |         |
          | | | | | |                      | | | | | |
           - - - - -                        - - - - -
      ===================              ===================
      ===================              ===================
       .-.-.-.-.-.-.-.-.                .-.-.-.-.-.-.-.-.
       | | | | | | | | |                | | | | | | | | |
  +    |       |       |           -    |       |       |
  -------------'       |           -------------'       |
       |               |                |               |
     |/'               `\|             _|_             _|_
   --|                   |--           \~/             \~/
     |\,               ,/|             ~T~             ~T~
      ~|               |~               |               |
       |               |                |               |
   ~~~~~~~~~~~~~~~~~~~~~~~~ -     + ~~~~~~~~~~~~~~~~~~~~~~~~



 Hmmmm, it gets worse...


    What's this one called?              Voltage doubler
    _______________________ +      - _______________________
       |               |                |               |
       |               |                |               |
     |/'               |               _|_              |
   --|~              -----             \~/            -----
     |\              ~~T~~             ~T~            ~~T~~
       |     output    |                |               |
       |-----o    o----|                |-----o AC o----|
       |               |                |               |
     |/'               |               _|_              |
   --|               -----             \~/            -----
     |\,             ~~T~~             ~T~            ~~T~~
      ~|               |                |               |
       |               |                |               |
   ~~~~~~~~~~~~~~~~~~~~~~~~ -     + ~~~~~~~~~~~~~~~~~~~~~~~~


 -=> Bye <=-

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