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

Active-RC Filter with 100MHz cutoff and 70dB SFDR in 0.35um?

Status
Not open for further replies.

frozenduck

Newbie level 4
Joined
Oct 6, 2008
Messages
5
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,331
active rc filter

Is it possible to design the filter with cutoff frequency = 100 MHz and the SFDR > 70 DB with 70 MHz Input? The process is 0.35um CMOS.

Is it possible to implement it in active RC?

In active RC, the opamp should have enough loop-gain at 100MHz to ensure the linearuity, right? If I use two stage opamp with 20dB/dec decrease, the GBW will be extreme high. If I use multi-stage opamp, the stability will be an issue. Is there any way to solve the problem?

Or I need to use openloop Gm-C filter? Which one is better for the specs?

Thanks.
 

jiangnancai

Junior Member level 3
Joined
Sep 3, 2006
Messages
31
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,433
0.35um cmos op-amp for filters

100MHz? may be too large for active-rc topology
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top