[SI-LIST] : PECL oscillator termination

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From: Tae-Kwang Jeon (tkjeon@vps6.lsil.com)
Date: Thu Nov 09 2000 - 11:09:34 PST


Hello everyone,

Here's a question on 3.3V PECL osc. termination.

I know that a Thevenin termination is used on the diff'l outputs of the osc.
But, what i'm concern is the case of AC-coupling to a 50ohm termination.
The qestions occurred to me are;
 #1 Is there any recommended value of the coupling cap?
 #2 How to size the resistors to DC-bias the PECL outputs? Is there also
    any recommended range of size?
 #3 In the case of #2, the resistors are supposed to be grounded, then what
    if I make them in series?
    
Any comments would be appreciated.

Regards,
TK
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TaeKwang Jeon, LSI Logic Corp.
1525 McCarthy Blvd Phone: (408) 433-6818
MS G-715 Fax : (408) 433-2840
Milpitas, CA 95035 Email: tkjeon@lsil.com
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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