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

need an idea on CMOS power amplifier

Status
Not open for further replies.

nk_me

Newbie level 1
Joined
Sep 13, 2003
Messages
0
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,280
Activity points
28
1Mhz 0db bandwidth,800u idle current .
The opamp is used to drive 8ohm resistive load.
who can give me a sugestion about the circuit structure?
 

lind

Newbie level 5
Joined
Sep 11, 2003
Messages
8
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
58
Why don't use the classical scheme:
Differential pair input with dynamic load - second common emitter stage (otional) - output common collector stage.
All the stages feed using current mirrors. Adjust transistor area factor for desired current rates.
By the way motorola site has application notes with examples of such a design - try to look through them. Good luck!
 

nk_me

Newbie level 1
Joined
Sep 13, 2003
Messages
0
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,280
Activity points
28
thank u first,
U give a good idea,but this power amplifier should be a cmos design,not bipolar or bicmos.
This amplifier shoud have a output stage to deliver current to load and bias circuits to stable the quiecent current in output stage. It will be implemented in 0.25um standard CMOS process.For noise consideration,it should has a p-type input differential pair.
I will read the application notes for solutions.
Happy weekend!
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top