How to reduce power dissipation at the amplifier stage of a pipeline ADC?

[suhas_shiv]

Hi all,

In a pipeline ADC, most of the power is dissipated in the amplifier stage. What are the steps that should be taken to reduce power dissipation there? I mean which part of the amplifier stage would you concentrate on to reduce power and how?

Thanks,

Suhas

 

[sankudey]

Re: Low power Design

what amp r u talking about....i don't think its MDAC....is it the pre-amp of comp....

please elaborate ur view...may be helpful to understand....

 

[suhas_shiv]

Low power Design

Well, the amplifier is in the MDAC(Gain of 2 for 1.5 bits/stage). Basically what I am asking is how would you reduce power consumption in a pipeline ADC.

Thanks.

 

[sankudey]

Re: Low power Design

Hi,
The following Doc may help u....it is pipelined ADC...and power saving technique is used.....

The doc is already uploaded in....



gd luck...
sankudey

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55-mW 200-MSPS 10-bit Pipeline ADCs for Wireless Receivers


Kurose, D. Ito, T. Ueno, T. Yamaji, T. Itakura, T.


This paper appears in: Solid-State Circuits, IEEE Journal of
Publication Date: July 2006
Volume: 41, Issue: 7
On page(s): 1589- 1595
ISSN: 0018-9200
Digital Object Identifier: 10.1109/JSSC.2006.873888
Posted online: 2006-06-26 09:29:37.0




Abstract
A new power reduction technique for analog-to-digital converters (ADCs) is proposed in this paper. The power reduction technique is a kind of amplifier sharing technique and it is suitable for ADCs in a wireless receiver. A test chip, which contains two ADCs, is fabricated in 90-nm 1-poly 7-metal CMOS technology. The 10-bit ADC dissipates 55 mW from 1.2-V supply, when the ADC operates at 200 mega-samples per second (MSPS). The 10-bit, 200-MSPS ADCs achieve maximum differential nonlinearity (DNL) of 0.66 least significant bit (LSB), maximum integral nonlinearity (INL) of 1.00 LSB, a spurious-free dynamic range (SFDR) of 66.5 dB and a peak signal-to-noise plus distortion ratio (SNDR) of 54.4 dB that corresponds to 8.7 effective number of bits (ENOB). The active area is 1.8 mm$times$1.4 mm.

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