[SI-LIST] Re: Interfacing Single ended PECL signal to differenti

Hello Nagammai!,
I feel that the device mentioned (2)
Converts Single-ended Input Signals into Differential Signals for driving
long lines that are intended for EXTERNAL WORLD applications.But if u r
looking for this conversion within ur PCB say the i/p is for a high speed
ASIC then option2 is not desirable as it is bulky.
why not consider some devices (in ur design) like VNF6PECL155 that take
either single/diff.  PECL s/l ?
Or try for interface devices from Micrel(Synrgy)

Regrads,
Prasanna 

-----Original Message-----
From: Steven Kan [mailto:steven@xxxxxxxxxxxxxxxxxxxx]
Sent: Wednesday, October 23, 2002 11:46 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Interfacing Single ended PECL signal to
differenti



Nagammai,

There have been a few posts recommending approaches for designing your input
circuit. If you don't have access to the circuit at that level (e.g. you're
interfacing to an existing piece of equipment), then there are two other
options:

1) AC-couple into one of the inputs (only if your duty cycle is near 50%)
2) Use an external device to convert the signal to differential

We have two products that do the latter, either our dual channel PECL
receiver/line driver:

http://www.pulseresearchlab.com/products/differential/prl-430/430main.htm

or our 1:2 PECL fanout buffer, which can also take single-ended inputs:

http://www.pulseresearchlab.com/products/fanout/prl-431/431main.htm

Both are available in PECL, NECL and LVPECL versions. HTH!
--
Steven Kan
Pulse Research Lab
http://www.pulseresearchlab.com
----- Original Message -----
> si-list Digest Sat, 19 Oct 2002 Volume: 02  Issue: 290
>
> Msg: #1 in digest
> From: "Nagammai Periya Karuppan. - CTD, Chennai." <Nagap@xxxxxxxxxxxxxxx>
> Subject: [SI-LIST] Interfacing Single ended PECL signal to differential
PECL pa
> Date: Sat, 19 Oct 2002 15:18:50 +0530
>
> Hello Experts,
>    Can you please give me suggestions as to how to
> connect a single ended PECL signal output to a
> differential PECL signals inputs. What should be done
> to the unused input of the differential pair.
[snip]


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