Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic 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.

Register Log in

stability analysis and error amplifier design of PWM switching converter

Status
Not open for further replies.

viperpaki007

Full Member level 5
Joined
Jul 2, 2008
Messages
270
Helped
11
Reputation
22
Reaction score
8
Trophy points
1,298
Location
Finland
Activity points
3,393
Hi,

I am designing PWM based integrated DC-DC converter operating at 300MHz clock frequency. I need to do the stability analysis of whole circuit inorder to check whether the whole feeback system is stable or not. What kind of simulations i should do for that in cadence spectre RF?. What kind of error amplifier will be suitable for this kind of system.

regards
 

tgootee

Full Member level 2
Joined
Jul 25, 2013
Messages
123
Helped
32
Reputation
62
Reaction score
31
Trophy points
28
Location
Indiana, USA
Activity points
1,251
Will you be able to plot open-loop gain and phase equivalents?

Edit: Since you don't yet have the feedback error amplifier designed, you should simply design the feedback in such a way that it will be guaranteed to have your choice of stability margins. The simulation would then only be used to check that your results are correct.
 
Last edited:

viperpaki007

Full Member level 5
Joined
Jul 2, 2008
Messages
270
Helped
11
Reputation
22
Reaction score
8
Trophy points
1,298
Location
Finland
Activity points
3,393
i dont have any idea which kind of design equations i should use to get the overall stability margins....Moreover, what kind of simulations i should use in cadence to check stability. Can you please give me any link to study
 

dick_freebird

Advanced Member level 5
Joined
Mar 4, 2008
Messages
6,765
Helped
1,992
Reputation
3,988
Reaction score
1,815
Trophy points
1,393
Location
USA
Activity points
54,248
I am curious just how you intend to obtain square wave
switching at 300MHz, at any kind of power. Because I'm
finding it "interesting" at 50MHz.
 

tgootee

Full Member level 2
Joined
Jul 25, 2013
Messages
123
Helped
32
Reputation
62
Reaction score
31
Trophy points
28
Location
Indiana, USA
Activity points
1,251
What kind of hardware implementation are you trying to use? Without using a pro-manufactured multilayer PCB, with separate planes for each power rail and ground, and controlled-impedance lines, it might be tough. And even then, it would probably be tough. Low inductance is one of the magic words, one translation of which is short distances. Decoupling caps' placements (i.e. connection lengths), and type and sizewould be extremely important
 

viperpaki007

Full Member level 5
Joined
Jul 2, 2008
Messages
270
Helped
11
Reputation
22
Reaction score
8
Trophy points
1,298
Location
Finland
Activity points
3,393
Hi,

Thanks for the help. I am designing the converter on 65nm CMOS process. The design requirements require high bandwidth operation from DC-DC converter. Therefore, using high switching frequency is necessary. Currently i am using an ideal clock source to drive the converter and checking what will be a more practical switching frequency for converter.
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top