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.

how to generate the signal

Status
Not open for further replies.

lhlbluesky

Banned
Joined
Mar 30, 2007
Messages
558
Helped
5
Reputation
10
Reaction score
5
Trophy points
1,298
Location
china
Activity points
0
i want to generate the following waveform, the first waveform is the input, the second waveform is the output, that is, the output waveform changes state (0 to 1, or 1 to 0)when the input falls down to the low threshold. it is very strange. 1.JPG
i'm confused, what circuit can realize the function? please help me. thanks all.
 

barry

Advanced Member level 5
Joined
Mar 31, 2005
Messages
5,094
Helped
1,113
Reputation
2,238
Reaction score
1,100
Trophy points
1,393
Location
California, USA
Activity points
27,915
1) Note that the bottom waveform is 1/2 the frequency of the input.
2) Apply the input waveform to a comparator
3) The output of the comparator drives the clock input of a flip-flop.
4) Did I just do your homework for you?

This solution would not create EXACTLY the output shown. IF you really need output to switch at the inflection point of the input (where the slope changes from negative to positive), you would need to use something fancier, like a differentiator.
 

lhlbluesky

Banned
Joined
Mar 30, 2007
Messages
558
Helped
5
Reputation
10
Reaction score
5
Trophy points
1,298
Location
china
Activity points
0
thanks barry. but i want to know, how to realize a differentiator, and how to realize the function using a differentiator? can you explain more clearly? or give me some papers? thanks.

or any other ideas?
 

barry

Advanced Member level 5
Joined
Mar 31, 2005
Messages
5,094
Helped
1,113
Reputation
2,238
Reaction score
1,100
Trophy points
1,393
Location
California, USA
Activity points
27,915
Search the web for opamp differentiator, there should be plenty of examples
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top