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Does anyone have Folding and interpolating adc behavior model in simulink or give me some suggestion?Thanks for your help！！

## Number of bits in Folding & Interpolating ADC

Hi In a typical folding & interpolating architecture, there are two main parts: the Coarse Quantizer and the Fine Quantizer. In all the papers that i have seen the Coarse Quantizer is of 2Bits and the rest of bits(4 up to 6) are related with the Fine Quantizer. In this way, adcs with bit numbers up to 8 are implemented. My question is why the Co

## problem with the output of ADC when sampling rate is high

Hi, I have just discovered something strange with my 8-bit Folding and interpolating adc when the sampling rate is higher than 30 MHz. As you can see in attachment, when the input signal (V(vin)) 0 V (just ignore 1 V because it is the DC offset) the output of my adc showed '00111111'. It must be '00000000'. Does anyone experience this (...)

## INL DNL calculation in ADC

sir i am doing 8 Bit folding 8 interpolating adc in cadence. plz tell me how to calculate INL,DNL factor using calculator option of cadence tool. is there any other way to calculate INL,DNL factor. How to calculate noise margin and SFDR ?

## guide to write technical thesis report

hello, I'm finishing with my thesis soon. My thesis is design of folding and interpolating adc. does someone has the eBook as guide to write my thesis?

## How to solve zero crossing interpolation?

Hello, I have just simulated my folding and interpolating adc. The resolution of that adc is 8 bit with 1.4v full scale input. 1 LSB is about 5.5mV. After i simulated it staticaly(without frequency). The digital output only changed when Vin is 6.9mV or more. Theoritically it will changed at 5.5mV or more. Somehow i found that the (...)

## glitch in the output of digital logic

Hi, I've just simulated a folding & interpolating adc and found a glitch around 0.5 V after an EX-OR logic in my digital part. In the attachment, V(c07) and V(c23) are the input and V(out_07_23) is the output of EX-OR. As you can see in waveform, there is a glitch of 0.5 V(at time 0.3 us) of the output of EX-OR.I'm wondering how this happened be

## SFDR becomes worse with higher sampling frequency

i'm simulating a 8-bit Folding and interpolating adc and just found out that its SFDR is at 60dB at sampling rate of 25MHz. When i increase the sampling rate to 40MHz the SFDR of my adc degrades to 30dB. Does anyone have the idea which main factors cause this? Thanks in advanced

## fresh graduate looking for a job in IC analog design

Hi, i have just finished my diplom(Dipl. Ing(FH)) study in electrical engineering in germany. I have a good knowledge of CMOS IC analog design and my final thesis was design of folding and interpolating adc. I am fresh graduate and i found it tough to get the job in Ic design since all positions require at least 3 yr experience. Can someone give

## kinds of high speed adc

I have a different view for the above question.... In some architecture odd no of bits are possible (like simple flash, 2step flash, Folding-interpolating etc.).....even some times while doing the design....people may find that the resolution coming is 7bit or 9 bit...but they specify one bit lower ...with better spec..... What I think is that...

Dear Friends, Recently, I studied about Folding & interpolating adcs. I didn't undrestand how they actually quantize the analog signal? can anybody give me a clear guidance about how it works, any example or good paper that would explain the exact operation of it? I do appreciate you. Regards, Samaneh

## Help me design a circuit for CCD array to ADC

Anyone designed a circuit for CCD array to adc? Looking for advice or ref design. I am using a sony ILX5xx series 5k pixel CCD, need to do an A/D conversion and get the digital data out. thanks Ahgu

## Anyone has experience using this ADC especially in dasy-c?

Anyone having experience using this adc especially in dasy-chained serial mode?

## How to use video adc on a video card?

I could't find a good and fast video adc for my project and I have to use my graphic card adc but I don't know how.if anybody knows how to use video adc on the video is not important which card it is.I can find most cards.

## nedd 16 bit adc+mc - any ideas?

hai, anybody have idea about microcontroller with 16 bit adc and sampling rate of 8Khz+uart please mail me senthils2k@yahoo.com by

## I need 24bit ADC with built-in micro with 32-64 Kb flash

Hi! I need 24bit adc with built-in microcontroller with 32-64 Kbyte flash. This device should low cost. Thanks Bye!

## need help on sigma delta ADC?

Hello I have worked with analog device AD77 series(like as AD7714,15,19,30) But I have problem with them in noisy environment and in sensors that connected to it with long cables ,Sometimes they hang or lock, if I power off the card then power on it ,it works,I do not know what to do with them, They are good adcs ,because they have low pass

## 8 ch Adc -> Mcu -> Pc

Hi there, I need to build an interface that has 8 ch adc connected to pc.I want to measure voltage between 0-5V with this circuit.I saw one guy built this device with pic14f000.I can't copy device because its mcu is code i need to build my own device.I need a similar project (schematic, source code of mcu (asm), source code of contr

Hi all, I have a current transformer, and I whant to read the value using the adc of a 16F873. Problem is, for 20A in primary, I get 20mA on secondary, an with a resistor of 100Ohm I get a sine wave of 2.828 peak. I have tinked to put a rectifier bridge of schottky diodes, but any way, when I get 1mA, the voltage are all droped on diode

## Req.-Microcontroller with ADC and USB

Does anyone knows a Microcontroller with adc (16bit,30kHz sampling rate) and USB interface? Something similar to TI-BurrBrown Msc1210 but with previously specified features. Optionally can work a separate adc with SPI and uController with SPI and USB. Many thanks to

## help me on the problem of the simulate of a simple adc

this is a 4-order cascading adc, a simple 4-order adc with matlab i find a problem . first the input of the second stage is too large (see the pic) second the last output is in the arrang of -1 and +1,but it should be in 0-1 why ? what wrong? thanks a lot!

any good cheap 16bit adc , higher than 10K sample rate single channel out there that you recommend? thanks ahgu

## Looking for a good book for ADC (high-speed)

Hi, Does anybody have a good book for adc (preferably high-speed)? Bye.

I was building a PC based oscilloscope based on a parallel port and a tda8703 plus some glue logic. However i was having terrible problems with noise (in form of some spikes). Hardware is simple. Just a 74als244 connected to parallel port for data in(in epp mode). In one extreme and tda8703 in the other. adc clock is 24MHz. Some example circuits

## Help me with ADC function problem of 16F877A

Hi, I'm in trouble with adc function of 16F877A.I am using port A0,A1,A5,E0,E1,E2.When i measure voltage between ports and GND they are usually at 1 milivolt or 2 milivolts.But when i log them adc function returns 100-120 values equals to 2.0V - 2.5V.When i measure E2 it gives 50 milivolt when i dont apply voltage on it(when idle i mean)!! My devi

## How to make a 16-bit resolution sinewave for ADC testing

What is the basic requirement of equipment for measuring a 14-bit resolution of a sigma-delta adc, in particular to measure the Signal to Noise ratio ?

## How to simulation ADC SFDR/ENOB/INL/DNL by hspice ??

How to simulation SNDR on hspice ?? someone said use .Four Fin and will find THD , SNDR=THD

## high speed SPICE ADC model

Any article about High Speed adc modelling?. I'm looking for AD9070 model. Analog Devices doen't provide it. Is it possible to model some of this effects ENOB, S/N, AC linearity, Error Rate, Aperture jitter How reliable could be such model?

## Help me with transforming a value from ADC of PIC16F870

I am reading value from adc of PIC16F870 and transform in to another value by using the equation (y-y1)=m(x-x1) where m=(y2-y1)/(x2-x1). I also including the code where the value temp2 is the y of the equation. This value is to be displayed on 4 digit 7 segment display. What I am doing I am not getting the result. Is there anyone can help me.

## speed of zilog encore adc

i have access to a zilog encore F64 eval board. after reading through the manual...i'm still clueless as to how fast can the onchip adc sample incoming signal i asked tech answer anybody can help me?

In my design ,an ads7844 is used, the /cs(chip select pin) is connected directly to gnd(i have only one serial adc,so i think no chip select is needed ) and the logic operations are controlled by an altera cpld EPM3256a the problem is that when the power is on,the chip's Busy output signal keeps high, that means the chip is busy all the time wit

## Can anyone recomend me for a uC + lcd +adc under 5\$ @1000

Hi all For a new project I need to use a uC + lcd (50 segment driver min) an 3 ch adc converter (8 bit and up on board the uC) + 3 timer's Price under 5\$ @1000 Can any one recomend me for one ? Best regards Bobi :?:

## -ve input to ADC of AVRs & PICs

Hi, You can only put +ve signals to the input of AVRs and PICs Analog to digital convertors. :( Any Idea to get -ve input. I have two ideas 1. Inverting the input (but how to stop +ve signal to get invert?) 2. Shift the input voltage i.e 0V gives 2.048V at adc (how to shift? and we will loose one bit also) What is your idea, need help.

## How to interface ADC with PIC micro using SPI protocol?

I want to interface adc with PIC microcontroller using SPI protocol.and i want to know how SPI works .wat is the protocol ???? i want a detailed explanation about the protocol can any body please help me.

## who can tell me the application of 10bit 100Msps ADC?

who can tell me the application of 10bit 100Msps adc in detail? can it use in 802.11a/b/g? :idea:

## msp430 adc hex to decimal routine

hi, can someone help me by giving a method or code( :D ) in c for converting a hex o/p of the 12bit adc on the msp to a decimal number ?? i need to do some mul. and div etc. on that data before displaying it on the LCD. any help will be appreciated. :) thank you sam

I am in the process of designing a circuit with a 24-bit adc on it. I am wondering if i should devide the ground plane (4 layer with sig-5V-GND-sig) up into digital and analogue. This particular adc (texas ADS1251) does not have a digital supply input. So should i just have one unborken ground plane, at present there will be no digital component

## Looking for a micro to interface with ADC board

Hello i am looking for a micro to interface with a adc board. I am hoping to find something cheap that will read in data from the micro at 480kbits/sec serially. We were going to use one of the 64180 variants that we use for other products but it doesnt seem fast enough. The adc ( ADS1251) itself will assert a data ready line then

## 2's complement output in ADC...

I have CS5550 adc from cirrus logic. The output register is of the form -(2^0) (2^-1) (2^-2) .......... (2^-23) This is a 24-bit register. It is given in the datasheet that : These register contain the last value of the measured results of AIN1 and AIN2. The results will be within the range of -1.0 <= AIN1, AIN2 < 1.0. The value is repres

## Interfacing Uni-polar ADC to Bi-polar Signal

Hi, Can any body out there tell me or any schematic how can I interface the Bi-polar signal (+/-1.5v ) signal to my 3.3 v adc working in unidirectional conversion(0-3v) Signal. :)

## How to improve the resolution of ADC by software processing?

Hi, I need some suggestions on improving the resolution of adc by software processing.

## Suggestions on high speed 8 bit adc

Hiall, I would like to hear some opinions about high speed 8 bit adc (betw. 200 and 1000 Msps). I intend to use it in a DSO, and I still don't know yet which one is the best (performance, price, easy integration....). Thanks.

## where can I find such High Speed ADC

Hi,every one! Where can i find the adc,which is 300MHz SPS,and 10 bit resolution?