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firsttimedesigning
Joined: 04 Jul 2007
Posts: 96
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 06 Feb 2008 3:43 Successive Approximation ADC |
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So I am desingning a SA ADC. The problem I am having is that how can I design the Successive Approximation Register (SAR). Do I design it using state diagrams?
If I use state diagrams (Moore State) to design it, then I will have to draw A LOT state diagrams for a SA ADC that can convert 8 bits. State diagrams is the only way that I know, is there any other way?
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mahgoub
Joined: 26 Oct 2007
Posts: 96
Helped: 2
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| 06 Feb 2008 9:28 Successive Approximation ADC |
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you can use an old implemention
Added after 11 minutes:
try data converter book there are many in forum
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arsenal
Joined: 17 Oct 2004
Posts: 130
Helped: 11
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| 08 Feb 2008 0:53 Successive Approximation ADC |
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| Refer to Allen's book, in the charpter of ADC, there is a perfect diagram of SAR ADC, just do as that diagram!
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mahgoub
Joined: 26 Oct 2007
Posts: 96
Helped: 2
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| 10 Feb 2008 0:17 Successive Approximation ADC |
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| do you hAVE ALInk to it arsenal
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fredflinstone
Joined: 20 May 2005
Posts: 75
Helped: 17
Location: Bangalore, India
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| 15 Feb 2008 6:11 Successive Approximation ADC |
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SA register can be made as a simple shift register which shifts a logic HIGH from MSB flop to LSB flop. Also it stores the current comparator input to the corresponding flop.
This should be very easy to implement.. either writing VHDL code or manual design...
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wateror
Joined: 26 Aug 2007
Posts: 53
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| 18 Feb 2008 5:36 Re: Successive Approximation ADC |
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| allen's book for a start
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Tipu
Joined: 12 Sep 2007
Posts: 26
Location: INDIA (HYDERABAD)
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| 19 Feb 2008 18:27 Re: Successive Approximation ADC |
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Hai
i had wriiten a code in verilog? but for better accuracy i think i need to go for analog design do u think may i right?
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fredflinstone
Joined: 20 May 2005
Posts: 75
Helped: 17
Location: Bangalore, India
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| 24 Feb 2008 15:12 Successive Approximation ADC |
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| The Successive Approximation Register can be designed entirely in digital ... no need to do anything in analog..
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arjun_p_cet
Joined: 27 Feb 2007
Posts: 10
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| 24 Feb 2008 18:09 Re: Successive Approximation ADC |
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this book from analog devices will help u with the basics
h**p://rapidshare.com/files/53248394/3-09091.zip
(dont forget to put 't' in place of '*')
Added after 36 minutes:
also check these books....
Analog Circuit Design: High-Speed A-D Converters,
http://mihd.net/s9rqgj
Added after 12 minutes:
Data Converters
http://rapidshare.com/files/58078383/DC.rar
pass:gigapedia.org
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ashish_chauhan
Joined: 02 Sep 2007
Posts: 181
Helped: 32
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| 25 Feb 2008 12:15 Re: Successive Approximation ADC |
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| the password does not work... seems u have changed it...?
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endrawan
Joined: 27 Feb 2008
Posts: 3
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| 27 Feb 2008 5:13 Re:Sucessive Approximation ADC |
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| It can be disgned first in P-Spice
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ee07d003
Joined: 18 Feb 2008
Posts: 7
Helped: 1
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| 27 Feb 2008 15:17 Re: Successive Approximation ADC |
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| Hey, you get videos on web teaching SAR-ADC design. In fact, Maxim-ic, National Semiconductor and Analog Devices provide application notes on SAR-ADC.
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raj_shekar
Joined: 27 Feb 2008
Posts: 11
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| 28 Feb 2008 6:17 Re: Successive Approximation ADC |
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| There is no need for state machine if u know about how many cycles conversion takes place. u can generate the sample signal by delay elements(F/Fs) and use shift registers to transfer 1 from MSB F/F to other F/F for every conversion cycle. and latch the compartor output by generating the latch clock.
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neter
Joined: 15 Jul 2004
Posts: 48
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| 04 Mar 2008 9:38 Successive Approximation ADC |
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| Have any design example for SAR ADC?
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mahgoub
Joined: 26 Oct 2007
Posts: 96
Helped: 2
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| 06 Mar 2008 17:46 Successive Approximation ADC |
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| search im this site
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arjun_p_cet
Joined: 27 Feb 2007
Posts: 10
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| 08 Mar 2008 14:11 Re: Successive Approximation ADC |
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| try "CMOS Analog to digital and Digital to Analog converters" by Rud van Plassche.....u get basic ideas...also u get information about good reference papers on SA ADCs
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MikeR
Joined: 16 Dec 2006
Posts: 77
Helped: 5
Location: Belarus
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| 28 Mar 2008 13:55 Successive Approximation ADC |
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| When I design ADC (any type) for algoritm or logic I use verilog code. And for SAR you mast have not only 1 reg. Your logic bloc must contain driver for S/H, driver for Comparator and DAC. Realize this functions in primitive logic components not use VERILOG is difficult.
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redswat
Joined: 20 Dec 2002
Posts: 13
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| 02 Apr 2008 4:29 Re: Successive Approximation ADC |
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” Data Converters
http://rapidshare.com/files/58078383/DC.rar
pass:gigapedia.org“
it's a very good book ,thank you！arjun_p_cet
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manissri
Joined: 16 Apr 2005
Posts: 266
Helped: 6
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| 04 Apr 2008 13:03 Re: Successive Approximation ADC |
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see this papaer
"nonredundant successive approximation register for A/D converters"
A.Rossi and G.Fucili.
definatiley it wud help u.
regards
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