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.

increasing gain of transconductor

Status
Not open for further replies.

dadaboq

Newbie level 4
Joined
Apr 14, 2015
Messages
5
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
30
suppose i have a OTA circuit and the configuration is that the two 2stage op amps are connected with a current multiplier with feed back....how can i increase the gain?
 

erikl

Super Moderator
Staff member
Joined
Sep 9, 2008
Messages
8,112
Helped
2,689
Reputation
5,358
Reaction score
2,291
Trophy points
1,393
Location
Germany
Activity points
44,155
I'd suggest to show your schematics.
 

SunnySkyguy

Advanced Member level 5
Joined
Sep 26, 2007
Messages
6,743
Helped
1,675
Reputation
3,348
Reaction score
1,644
Trophy points
1,413
Location
Richmond Hill, ON, Canada
Activity points
50,732
Av= gm * RL

What's the problem?
Did you consider input impedance on load

Use CMOS unbuffered inverter or FET complementary buffer between stages.

Choose based on Vth and RdsOn. Or simply try a 15V logic gate.

BTW the RdsOn of an old technology CMOS inverter is around 500 ohms and with negative feedback becomes a linear amplifier.
Modern ones are low voltage are 25 ohms in 7 xxxALVC2 ? types. or the type used in MEGA chips.
 
Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top