modem help

From: Jim Kearney <jim_at_jkearney.com>
Date: Sat Oct 26 14:39:00 2002

> Very... The only full-wave rectifier you can get without a centre-tapped
>input is a bridge, and that doesn't have a common connection between
> input and output for one thing. It also only gives a single polarity
> output.

...

> Basically 2 half-wave rectifiers, each accepting one half of the AC input

There is a useful way to use a bridge to do this. It wastes half of it,
but it's a single component that doesn't need its leads formed instead of
two that do, so I often use it. Probably not cost effective for mass
production, though.

     +--------+
     | |
-----| ~ + |-------+---------------- +V
     | | |
--*--| ~ - |-------(----+----------- -V
  | | | _|_+ _|_-
  | +--------+ ___ ___
  | | - | +
  +-------------------+----+----------- gnd
Received on Sat Oct 26 2002 - 14:39:00 BST