Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Placement of series termination.

Status
Not open for further replies.

openstm

Newbie level 5
Joined
Jul 1, 2009
Messages
8
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
INDIA
Activity points
1,341
series termination placement

Hi,
We are generating a clock from a oscillator. If we are going to drive that clock signal through a clock buffer, Where should I keep the series termination. Whether at the output of the oscillator or output of the buffer?
Please clarify and justify.
Thank you,
Siva
 

FvM

Super Moderator
Staff member
Joined
Jan 22, 2008
Messages
48,294
Helped
14,229
Reputation
28,719
Reaction score
12,923
Trophy points
1,393
Location
Bochum, Germany
Activity points
279,648
frequency series termination

I don't understand the "or" in your question. The oscillator and the clock buffer output possibly need series termination, depending on the signal frequency, connected trace length and load properties.

But typically, I would expect it for the clock buffer.
 

rfmw

Advanced Member level 2
Joined
May 10, 2001
Messages
545
Helped
93
Reputation
190
Reaction score
50
Trophy points
1,308
Activity points
3,978
series termination resistor

Series-termination resistor is placed at the device output that drives a transmission line. For more info, please attach your circuit diagram.
 

openstm

Newbie level 5
Joined
Jul 1, 2009
Messages
8
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
INDIA
Activity points
1,341
series termination of transmission line

Thank you for the comments..
 

dmd4raj

Member level 4
Joined
Jun 23, 2008
Messages
69
Helped
11
Reputation
22
Reaction score
7
Trophy points
1,288
Activity points
1,722
series termination resistor placement

Place the series termination series to source(near)for the proper temination

Regards
Rajan.K
 

jai_vardhan

Junior Member level 3
Joined
Apr 19, 2010
Messages
26
Helped
2
Reputation
4
Reaction score
2
Trophy points
1,283
Location
noida
Activity points
1,406
Re: series termination resistor placement

In a 8pin SOIC Clk buffer there are total 5 clk o/p all are feeded through series resistor. Keep in mind that always series resistor tobe placed near to driver side and parellel to source side.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top