From: Eric Goodill ([email protected])
Date: Mon Feb 26 2001 - 18:09:19 PST
Ron,
Our reason for both resistors is to terminate any common-mode signal
that might be on the lines either from crosstalk or from an unbalanced
driver.
-Eric
Ron Miller wrote:
>
> Hi Eric
>
> Why not just use a single resistor to terminate the differential mode,
> which is the signal you are intrested in.
>
> Tieing the center-tap to ground allows common mode currents to flow
> which usually end up allowing power supply ground currents to get into
> the sensitive signal paths.
>
> -----Original Message-----
> From: Eric Goodill [mailto:[email protected]]
> Sent: Monday, February 26, 2001 3:47 PM
> Subject: [SI-LIST] : Combined single-ended/differential termination
> package?
>
> Hi,
>
> We often use this termination scheme:
>
> SIG+ -------+
> |
> R
> |
> +--C--+
> | |
> R V
> | GND
> SIG- -------+
>
> That is, two resistors in series between the differential signals with a
> center-tapped capacitor to ground. Is there a combined device to sucks
> all these parts into a three-pin package?
>
> Regards, Eric
-- Eric Goodill Redback Networks [email protected] 300 Holger Way voice: (408) 571-5319 San Jose, CA 95134-1362**** To unsubscribe from si-list or si-list-digest: send e-mail to [email protected]. In the BODY of message put: UNSUBSCRIBE si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP. si-list archives are accessible at http://www.qsl.net/wb6tpu ****
This archive was generated by hypermail 2b29 : Tue May 08 2001 - 14:30:57 PDT