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.

Filter circuit on PIC16F877

Status
Not open for further replies.

BHTan85

Newbie level 4
Joined
Jun 16, 2005
Messages
7
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,348
I got some problem for my filtering system. I got an output from my PIC16F877, but the output got some noise. The noise may be caused by the PIC, so how can I filter it out?
 

VVV

Advanced Member level 5
Joined
Nov 26, 2004
Messages
1,582
Helped
384
Reputation
768
Reaction score
88
Trophy points
1,328
Activity points
19,971
First of all, the noise should not be there. The PIC can only generate noise if the code is not working properly or if the power supply is not filtered adequately.

An RC filter could work, depending on the actual application. Can you provide more details/ schematic?
 

batdin

Full Member level 3
Joined
Jun 3, 2004
Messages
182
Helped
5
Reputation
10
Reaction score
2
Trophy points
1,298
Location
Bulgaria
Activity points
1,928
If you use the PWM output,there should not be noise if Vdd is stable enough and if the grounding is done properly.
If you use a normal output,the noise may be due to the program interrupt.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top