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Re: for Anand Dhuru

Subject: Re: for Anand Dhuru
From: nobody@xxxxxxxxxxxx (Dave Houston)
Date: Wed, 14 Dec 2005 14:22:36 GMT
Newsgroups: comp.home.automation
References: <439d9793.4330040@xxxxxxxxxxxxx> <1134199129.986619.34120@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> <439aba45.29134911@xxxxxxxxxxxxx>

I think there's a mistake in the schematic for the Power Lne Interface (p8).
Q4 is described as a 2N2222 but seems to be drawn as a 2N3907. I think this
is supposed to be a Class A-B push-pull amplifier. You can find schematics
and descriptions elsewhere for push-pull ampflifiers.

nobody@xxxxxxxxxxxx (Dave Houston) wrote:

>I recalled another app note that uses the same Toko T1002N transformer but
>with a transistor line amplifier. It's for the ST7537 which has been
>replaced by the ST7538. These are FSK modems but I think you're mostly
>interested in the line coupling.
>
>     http://www.st.com/stonline/books/ascii/docs/1124.htm
>

References:
- for Anand Dhuru
  - From: Dave Houston
- Re: for Anand Dhuru
  - From: Anand
- Re: for Anand Dhuru
  - From: Dave Houston

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