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True RMS

 
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LPP
Guest







True RMS
PostPosted: Fri Nov 09, 2001 5:11 am     Reply with quote

Dear all,

I am looking for routines to calculate TRUE RMS. I wrote one, but using float, it is very slow.
Thanks for any suggestions.
___________________________
This message was ported from CCS's old forum
Original Post ID: 1030
Titi Trandafir
Guest







Re: True RMS
PostPosted: Fri Nov 09, 2001 2:41 pm     Reply with quote

:=Dear all,
:=
:=I am looking for routines to calculate TRUE RMS. I wrote one, but using float, it is very slow.
:=Thanks for any suggestions.

True RMS of a relatively well behaved waveform or more like a random signal ?
___________________________
This message was ported from CCS's old forum
Original Post ID: 1040
LPP
Guest







Re: True RMS
PostPosted: Mon Nov 12, 2001 11:06 am     Reply with quote

:=:=Dear all,
:=:=
:=:=I am looking for routines to calculate TRUE RMS. I wrote one, but using float, it is very slow.
:=:=Thanks for any suggestions.
:=
:=True RMS of a relatively well behaved waveform or more like a random signal ?

Itīs like a random sinal.
Do you have any idea?
___________________________
This message was ported from CCS's old forum
Original Post ID: 1068
LPP
Guest







Re: True RMS
PostPosted: Mon Nov 12, 2001 11:07 am     Reply with quote

:=:=Dear all,
:=:=
:=:=I am looking for routines to calculate TRUE RMS. I wrote one, but using float, it is very slow.
:=:=Thanks for any suggestions.
:=
:=True RMS of a relatively well behaved waveform or more like a random signal ?

Itīs like a random sinal.
Do you have any idea?
___________________________
This message was ported from CCS's old forum
Original Post ID: 1069
Titi Trandafir
Guest







Yup!, this one is for CORDIC
PostPosted: Mon Nov 12, 2001 2:08 pm     Reply with quote

:=:=:=Dear all,
:=:=:=
:=:=:=I am looking for routines to calculate TRUE RMS. I wrote one, but using float, it is very slow.
:=:=:=Thanks for any suggestions.
:=:=
:=:=True RMS of a relatively well behaved waveform or more like a random signal ?
:=
:=Itīs like a random sinal.
:=Do you have any idea?

Cordic is ideal for fixed point arithmetic (that these microcontrollers can do very fast).You can use 8 bit 2's complement arithmetic. It can do very elegantly, squaring, averaging and then square rooting.
___________________________
This message was ported from CCS's old forum
Original Post ID: 1076
PGMer
Guest







Re: True RMS
PostPosted: Wed Nov 14, 2001 10:05 am     Reply with quote

:=Dear all,
:=
:=I am looking for routines to calculate TRUE RMS. I wrote one, but using float, it is very slow.
:=Thanks for any suggestions.


FYI: Analog Devices has a single chip solution for TRUE RMS to DC conversion w/dB out. With this chip it is possible to measure signals up to 8MHz. (part# AD637)
___________________________
This message was ported from CCS's old forum
Original Post ID: 1097
LPP
Guest







Re: Yup!, this one is for CORDIC
PostPosted: Fri Nov 16, 2001 4:51 am     Reply with quote

:=:=:=:=Dear all,
:=:=:=:=
:=:=:=:=I am looking for routines to calculate TRUE RMS. I wrote one, but using float, it is very slow.
:=:=:=:=Thanks for any suggestions.
:=:=:=
:=:=:=True RMS of a relatively well behaved waveform or more like a random signal ?
:=:=
:=:=Itīs like a random sinal.
:=:=Do you have any idea?
:=

:=Cordic is ideal for fixed point arithmetic (that these microcontrollers can do very fast).You can use 8 bit 2's complement arithmetic. It can do very elegantly, squaring, averaging and then square rooting.

Sorry, I donīt know about Cordic. Could you send more informations?
___________________________
This message was ported from CCS's old forum
Original Post ID: 1137
LPP
Guest







Re: True RMS
PostPosted: Fri Nov 16, 2001 4:56 am     Reply with quote

:=:=Dear all,
:=:=
:=:=I am looking for routines to calculate TRUE RMS. I wrote one, but using float, it is very slow.
:=:=Thanks for any suggestions.
:=
:=
:=FYI: Analog Devices has a single chip solution for TRUE RMS to DC conversion w/dB out. With this chip it is possible to measure signals up to 8MHz. (part# AD637)

Iīm using AD736, but itīs very expensive. I want to change it to a software.
___________________________
This message was ported from CCS's old forum
Original Post ID: 1138
Titi Trandafir
Guest







Re: Yup!, this one is for CORDIC
PostPosted: Mon Nov 19, 2001 10:08 am     Reply with quote

Do a //www.google.com search for CORDIC. You will see a lots of hits.
Hope this helps.



:=:=:=:=:=Dear all,
:=:=:=:=:=
:=:=:=:=:=I am looking for routines to calculate TRUE RMS. I wrote one, but using float, it is very slow.
:=:=:=:=:=Thanks for any suggestions.
:=:=:=:=
:=:=:=:=True RMS of a relatively well behaved waveform or more like a random signal ?
:=:=:=
:=:=:=Itīs like a random sinal.
:=:=:=Do you have any idea?
:=:=
:=
:=:=Cordic is ideal for fixed point arithmetic (that these microcontrollers can do very fast).You can use 8 bit 2's complement arithmetic. It can do very elegantly, squaring, averaging and then square rooting.
:=
:=Sorry, I donīt know about Cordic. Could you send more informations?
___________________________
This message was ported from CCS's old forum
Original Post ID: 1230
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