International Journal of Recent Technology and Engineering (IJRTE)
ISSN: 2277-3878, Volume-8 Issue-3, September 2019
8386
Retrieval Number: C6517098319/2019©BEIESP
DOI:10.35940/ijrte.C6517.098319
Published By:
Blue Eyes Intelligence Engineering
& Sciences Publication
Abstract: Analog-to-digital converter (ADC) is one of the key
component in any of the application oriented system design. This
paper mainly focused on the simulation of various non-ideal
parameters of an ADC as the number of resolution increases. The
effect of non-ideal aspects like Jitter model and error block model
are created in Matlab Simulink and the results are plotted. The
dynamic non-ideal characteristics are discussed with their
mathematical models and are compared with the equivalent
resolution ADCs. The preliminary observations are also drawn
according to the ideal characteristics. This shows that as the
resolution increases, the bandwidth of non-ideal characteristics
are also increases. This work is entitled to prove the non-idealities
of 12-bit Pipeline ADC.
Keywords: Pipeline ADC, Dynamic error, Harmonic distortion,
SFDR, Gain error, Offset error, DNL and INL, Sample and Hold,
Thermal noise.
I. INTRODUCTION
Analog to Digital converters (ADCs) which converts the
analog data into digital information. ADC is one of the bridge
between real world and digital world. The Architecture of
ADC offers good tradeoff between high speed, power
consumption and high resolutions. These parameters are
required mainly for wide range of applications like digital
audio and video, wireless communication information
acquisition systems, measurement systems, data
communication systems. Conjointly imaging and high
accuracy instrumentation systems. The complexity in speed
of conversion rate and high resolution of ADCs are become
superior [3]. These ADC designs are modified to realize the
product which reduces the time-to market. The speed of ADC
and resolution will determine the performance of the whole
system.
The design is for 12-bit resolution to convert digital to analog
and analog to digital. The each step having an effect with
clock jitter which will affect the signal accuracy [11]. The
proposed work introduces the pipeline ADC model
developed using MATLAB Simulink. In this work the
different model has been introduced to evaluate the
performance in non-ideal effects like sample and hold circuit,
clock jitter and error blocks. These non-ideal building blocks
are compared with ideal blocks of ADCs to verify the
outcome [18].
Revised Manuscript Received on September 25, 2019
Kiran B*, Department of Electronics Engineering, JAIN (Deeme-to-be
University), Bengaluru, India. Email: kiranb.smg@gmail.com
Vaibhav A Meshram, Department of Electronics and Communication
Engineering, Dayanand Sagar University, Bengaluru, India. Email:
drvaibhavam@gmail.com
ADC’s and DAC play a very significant role in int erfacing
real time parameters with Digital processing systems. ADC’s
are integral part of DSP and communication systems.
Pipeline ADC among different types exhibits better
performance in terms of resolution. Conversion rate and
power consumption are the parameters impact on the ADC
performance at behavioral level. The non-ideal parameters of
each block under behavioral model are characterized by the
mathematical model. Behavioral model is suitable to study
and analyze the non ideal conditions of ADC. Research
studies have shown that different languages for behavioral
modeling of various ADC’s. This work analyses the
non-linear behavioral effects of pipeline ADC using Matlab
Simulink platform. This optimize the performs of real time
constraints. The significant non-ideality parameters such as
clock jitter, spurious free dynamic range, Total harmonic
distortion, gain error, differential and integral non-linearity
are modeled and Effective Number of bits (ENoB) are
estimated and analyzed to map the effects on the performance
of Pipeline ADC’s.
II. DYNAMIC NON-IDEALITIES
In this section, high priority is considered as one of the point
in dynamic non-ideal parameters [2] of Pipeline ADC. The
proposed work is compared with an existing research for the
non-ideal parameters to prove the better results with various
types of ADCs [2]. ADC behavioral performance has a direct
impact by non-ideal conditions of real time parameters.
Non-ideal parameters for ADC are categorized into two
subclasses static and dynamics. Some of the dynamic
non-ideal parameters of ADC have great impact on the
performance and taken in this study are offset error, gain
error diffusion and non-linearity error [20].
A. Total Harmonic Distortion (THD)
In an ideal case the input signals are considered such that
phase frequency and amplitude are determined. For the total
harmonic distribution the input frequency of a variable is
defined to convert the input to get pure amplitude [17].
In which
denotes the output after the THD step.
Design and Performance Evaluation of Ideal
and Non-Ideal Effects of Pipeline ADC using
Software Reference Models
Kiran B, Vaibhav A Meshram