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.

Help! High stability oscillator

Status
Not open for further replies.

starrinesss

Junior Member level 1
Joined
Jun 19, 2007
Messages
18
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
China
Activity points
1,379
Hi guys,

Can anyone kindly tell me about some circuits or architectures of oscillator which have high frequency stability with different conditions, such as different supply voltage (from 3.6V to 2.5V), various process conditions(ff or ss).
Can anyone please upload some documents or papers

thx a lot
Starriness
 

liuyonggen_1

Full Member level 4
Joined
Dec 12, 2005
Messages
193
Helped
7
Reputation
14
Reaction score
3
Trophy points
1,298
Activity points
2,430
It seems that there is a paper about oscillator independent on process, please search IEEE!
 

starrinesss

Junior Member level 1
Joined
Jun 19, 2007
Messages
18
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
China
Activity points
1,379
liuyonggen_1 said:
It seems that there is a paper about oscillator independent on process, please search IEEE!
thank you , could you tell me the title?or upload it ?


Starriness
 

edwintsu

Member level 4
Joined
Mar 24, 2005
Messages
73
Helped
9
Reputation
18
Reaction score
3
Trophy points
1,288
Location
China
Activity points
1,677
U can use trimming pads for OSC stability frequency as you request.
 

firewind

Member level 1
Joined
Jun 7, 2005
Messages
36
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Location
Milky Way
Activity points
1,535
get a crystal or quartz oscillator. They're extremely stable and have very low temperature coefficient.
 

iamxo

Full Member level 4
Joined
Mar 22, 2006
Messages
227
Helped
16
Reputation
32
Reaction score
4
Trophy points
1,298
Location
Southeast Asia
Activity points
2,495
here is one paper, may be it will help.

title: Process and temperature compensation in a 7-MHz CMOS clock oscillator
 

starrinesss

Junior Member level 1
Joined
Jun 19, 2007
Messages
18
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
China
Activity points
1,379
edwintsu
I dont think trimming pad is avilable in my design.

firewind
The crystal reference is not allowed. Sorry.

StarrinesS
 

heartwide

Junior Member level 3
Joined
Jan 20, 2006
Messages
29
Helped
3
Reputation
6
Reaction score
0
Trophy points
1,281
Activity points
1,439
frequency stability must cover wide PVT range that depend on your application.

for supply or vin, you can use a Regulator to supply your oscillator rather than use real VDD directely, it benefit you very much
for process, you can use trimming to achieve target
meanwhile,you can use relaxation topology
 

starrinesss

Junior Member level 1
Joined
Jun 19, 2007
Messages
18
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
China
Activity points
1,379
heartwide
Yes, I suppose to use a bandgap reference for powersupply, but need a compensation circuit to adjust the output frequency for variation of process.
So it must be a voltage(current)-controlled oscillator, is that right?

starriness
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top