I have a question about op amp. for band pass filter

Status
Not open for further replies.
S

surno

Junior Member level 3
Joined
Jan 9, 2006
Messages
26
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,281
Activity points
1,469
Hi, all~

I'm designing op amp for active RC band pass filter at 40MHz.
I get a specification of op amp to do a filter modeling. The specification of op amp is like that :
- unity gain freq. is more than 5GHz when load cap is 0.5pF
- dc gain is needed 60dB
- maximum power dissipation is 500uW(vdd=1.2V).

Is it possible at CMOS process?
 

I think, it is impossible~
 

Hi,
for me, i got maximum of 160MHz bandwidth.
it may be possible and depends on basically your input transistor gm value and load capacitance. by decreasing load cap still more, i think you can achieve.
 

Hi nalog_prodigy

My final destination is 40MHz band pass filter. To make a 40MHz band pass filter, first of all I design an 5GHz op amp. I know that bandwidth releated input Tr gm and gm is related with current consumption.

Then, how do you design 5GHz amp maximum current 0.5mA. I think it is impossible.
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…