Help! High stability oscillator

[starrinesss]

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]

It seems that there is a paper about oscillator independent on process, please search IEEE!

 

[starrinesss]

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]

U can use trimming pads for OSC stability frequency as you request.

 

[firewind]

get a crystal or quartz oscillator. They're extremely stable and have very low temperature coefficient.

 

[iamxo]

here is one paper, may be it will help.

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

 

[starrinesss]

edwintsu
I dont think trimming pad is avilable in my design.

firewind
The crystal reference is not allowed. Sorry.

StarrinesS

 

[heartwide]

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]

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

 

[starrinesss]

iamxo

The paper is really helpful, thank you