How? to Design 1-order Switched Capacitor Sigma Delta ADC

[socware]

Hello ,
I want to design First order Switched Capacitor 1-bit Sigma Delta ADC.
I want to use an OTA and Comparator.

The A/D converter must provide at least 50dB SNR (signal tonoise ratio) over a 100kHz signal bandwidth.
Minimum sampling frequency: 64 MHz ,Differential Input range: 1Vppd ,
Power dissipation: less than 30mW 


Can anyone help me how to proceed.

Thanks

 

[fxxjssc]

hi,
I think you should refer to some books like <understanding Delta-sigma Data Converters>, there are a lot of paper introducing basic concept of first order one.
As you spec required, folded-cascode or telescopic OTA may help you design. would you like tell me about your VDD voltage?

 

[eldo]

According to you specs listed, it is not a difficult job. You can find many examples in JSSC.

 

[socware]

Re: How? to Design 1-order Switched Capacitor Sigma Delta AD

hi,
I think you should refer to some books like <understanding Delta-sigma Data Converters>, there are a lot of paper introducing basic concept of first order one.
As you spec required, folded-cascode or telescopic OTA may help you design. would you like tell me about your VDD voltage?

Vdd= 1.8 V

 

[socware]

Re: How? to Design 1-order Switched Capacitor Sigma Delta AD

According to you specs listed, it is not a difficult job. You can find many examples in JSSC.

can u send me some papers where all the steps of design from start are given.How do I approach and start.

if u have send me on socware@gmail.com

 

[dejunwang]

Re: How? to Design 1-order Switched Capacitor Sigma Delta AD

just grab the book from Richard Schreier " Understanding Delta Sigma Converter"
and start from there.

 

[socware]

Re: How? to Design 1-order Switched Capacitor Sigma Delta AD

I am reading the book, can u tell me how do I do the simulation of the design in Matlab... I have downloaded the ADC toolbox..how do I do now and sample matlab code...

Thanks