LPC MicrocontrollersのトピックHS - ADC, rare signal observed. https://community.nxp.com/t5/LPC-Microcontrollers/HS-ADC-rare-signal-observed/m-p/572361#M18558 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by rodri on Wed Apr 27 10:40:53 MST 2016</STRONG><BR /><SPAN>Hi,</SPAN><BR /><BR /><SPAN>I'm sampling a ramp signal with 50% of simmetry, but when I pass it to the PC and plot it with matlab I observe a rare signal.</SPAN><BR /><BR /><SPAN>(attached the images)</SPAN><BR /><BR /><SPAN>As you can see the triangular shape (that corresponds to the one I'm sampling) seems to be the envelope of a faster ramp. This second ramp has a positive pendent when the triangular signal is increasing the value, and negative when the triangular is going low. </SPAN><BR /><BR /><SPAN>Anybody have an idea about what is hapening?</SPAN><BR /><BR /><SPAN>thanks in advance </SPAN><BR /><BR /><SPAN>Regards,</SPAN></BODY></HTML> Wed, 15 Jun 2016 18:55:39 GMT lpcware 2016-06-15T18:55:39Z HS - ADC, rare signal observed. https://community.nxp.com/t5/LPC-Microcontrollers/HS-ADC-rare-signal-observed/m-p/572361#M18558 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by rodri on Wed Apr 27 10:40:53 MST 2016</STRONG><BR /><SPAN>Hi,</SPAN><BR /><BR /><SPAN>I'm sampling a ramp signal with 50% of simmetry, but when I pass it to the PC and plot it with matlab I observe a rare signal.</SPAN><BR /><BR /><SPAN>(attached the images)</SPAN><BR /><BR /><SPAN>As you can see the triangular shape (that corresponds to the one I'm sampling) seems to be the envelope of a faster ramp. This second ramp has a positive pendent when the triangular signal is increasing the value, and negative when the triangular is going low. </SPAN><BR /><BR /><SPAN>Anybody have an idea about what is hapening?</SPAN><BR /><BR /><SPAN>thanks in advance </SPAN><BR /><BR /><SPAN>Regards,</SPAN></BODY></HTML> Wed, 15 Jun 2016 18:55:39 GMT https://community.nxp.com/t5/LPC-Microcontrollers/HS-ADC-rare-signal-observed/m-p/572361#M18558 lpcware 2016-06-15T18:55:39Z Re: HS - ADC, rare signal observed. https://community.nxp.com/t5/LPC-Microcontrollers/HS-ADC-rare-signal-observed/m-p/572362#M18559 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by rodri on Mon May 02 14:22:50 MST 2016</STRONG><BR /><SPAN>Ok, solved.</SPAN><BR /><BR /><SPAN>I thought that was a endian problem or that the bits did not have the proper order, but the problem was in my transfer to pc code... repeating samples in transmission, a stupid error!! </SPAN><BR /><BR /></BODY></HTML> Wed, 15 Jun 2016 18:55:40 GMT https://community.nxp.com/t5/LPC-Microcontrollers/HS-ADC-rare-signal-observed/m-p/572362#M18559 lpcware 2016-06-15T18:55:40Z Re: HS - ADC, rare signal observed. https://community.nxp.com/t5/LPC-Microcontrollers/HS-ADC-rare-signal-observed/m-p/572363#M18560 <HTML><HEAD></HEAD><BODY><SPAN>bump</SPAN></BODY></HTML> Sun, 19 Jun 2016 01:09:26 GMT https://community.nxp.com/t5/LPC-Microcontrollers/HS-ADC-rare-signal-observed/m-p/572363#M18560 lpcware 2016-06-19T01:09:26Z