[time-nuts] TBOLT communication

Javier Herrero jherrero at hvsistemas.es
Wed Sep 24 21:32:31 UTC 2008


Not only that. The TTL are more frequently 3.3V TTL, and the TTL to 
RS-232 converters are supplied from 3.3V and uses a charge pump doubler 
and a charge pump inverter. Barely +/-6V. Usually they are designed for, 
and use, 100nF capacitors... the less expensive ones :) And a bigger 
capacitor would only mean less ripple.

Regards,

Javier

Lux, James P escribió:
>
> And they are a very cost sensitive product, so they're not going to put any bigger capacitor on the charge pump than absolutely necessary.
>
> Jim
>
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Javier Herrero                            EMAIL: jherrero at hvsistemas.com
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