Efficient CPS Method for Improving the Sampling Resolution of Periodic Signals

2014 ◽  
Vol 1077 ◽  
pp. 235-240
Author(s):  
Yun Chi Yeh ◽  
Liuh Chii Lin ◽  
Yuan Dong Chen
Keyword(s):  
Phase Shift ◽  
Sampling Rate ◽  
Analog To Digital Converters ◽  
Experimental Result ◽  
Periodic Signal ◽  
Analog To Digital ◽  
Conversion Time ◽  
Periodic Signals

Based on existing analog to digital converters (ADC), this study proposes a simple and reliable controlled phase shift (CPS) method to improve the sampling resolution of a periodic signal. The proposed method uses phase shifted sampling sets of a sequence of sampled periods to increase sample resolution. When combining these sets, the period is virtually sampled with a higher number of samples. The lower sampling rate (per period) alleviates the requirements to be imposed on the conversion time of the ADC. Under the original conversion time of ADC, the proposed method can provide more sampled signals. Experimental result shows the proposed CPS method can improve the sampling resolution of periodic signals.

scholarly journals Multiple Harmonics Fitting Algorithms Applied to Periodic Signals Based on Hilbert-Huang Transform

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Hui Wang ◽  
Zhengshi Liu ◽  
Bin Zhu ◽  
Quanjun Song
Keyword(s):  
Signal Processing ◽  
Harmonic Distortion ◽  
Digital Signal ◽  
Periodic Signal ◽  
Sinusoidal Wave ◽  
Analog To Digital ◽  
Triangular Wave ◽  
Hilbert Huang Transform ◽  
Digital To Analog Converters ◽  
Periodic Signals

A new generation of multipurpose measurement equipment is transforming the role of computers in instrumentation. The new features involve mixed devices, such as kinds of sensors, analog-to-digital and digital-to-analog converters, and digital signal processing techniques, that are able to substitute typical discrete instruments like multimeters and analyzers. Signal-processing applications frequently use least-squares (LS) sine-fitting algorithms. Periodic signals may be interpreted as a sum of sine waves with multiple frequencies: the Fourier series. This paper describes a new sine fitting algorithm that is able to fit a multiharmonic acquired periodic signal. By means of a “sinusoidal wave” whose amplitude and phase are both transient, the “triangular wave” can be reconstructed on the basis of Hilbert-Huang transform (HHT). This method can be used to test effective number of bits (ENOBs) of analog-to-digital converter (ADC), avoiding the trouble of selecting initial value of the parameters and working out the nonlinear equations. The simulation results show that the algorithm is precise and efficient. In the case of enough sampling points, even under the circumstances of low-resolution signal with the harmonic distortion existing, the root mean square (RMS) error between the sampling data of original “triangular wave” and the corresponding points of fitting “sinusoidal wave” is marvelously small. That maybe means, under the circumstances of any periodic signal, that ENOBs of high-resolution ADC can be tested accurately.

scholarly journals A Survey of Analog-to-Digital Converters for Operation under Radiation Environments

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1694
Author(s):  
Ernesto Pun-García ◽  
Marisa López-Vallejo
Keyword(s):  
Ionizing Radiation ◽  
State Of The Art ◽  
Sampling Rate ◽  
Analog To Digital Converters ◽  
Electrical Performance ◽  
Multiple Characteristic ◽  
New Developments ◽  
Analog To Digital ◽  
Figures Of Merit ◽  
Performance Patterns

In this work, we analyze in depth multiple characteristic data of a representative population of radenv-ADCs (analog-to-digital converters able to operate under radiation). Selected ADCs behave without latch-up below 50 MeV·cm2/mg and are able to bear doses of ionizing radiation above 50 krad(Si). An exhaustive search of ADCs with radiation characterization data has been carried out throughout the literature. The obtained collection is analyzed and compared against the state of the art of scientific ADCs, which reached years ago the electrical performance that radenv-ADCs provide nowadays. In fact, for a given Nyquist sampling rate, radenv-ADCs require significantly more power to achieve lower effective resolution. The extracted performance patterns and conclusions from our study aim to serve as reference for new developments towards more efficient implementations. As tools for this purpose, we have conceived FOMTID and FOMSET, two new figures of merit to compare radenv-ADCs that consider electrical and radiation performance.

scholarly journals Different Analog to Digital Converters Architectures

2020 ◽  
Vol 9 (4) ◽  
pp. 1256-1263
Keyword(s):  
Signal To Noise Ratio ◽  
Sampling Rate ◽  
Digital Signal ◽  
Vital Role ◽  
Analog To Digital Converters ◽  
Signal To Noise ◽  
Analog To Digital ◽  
Differential Nonlinearity ◽  
Gain Error ◽  
The Comparative Study

A series of recent studies has indicated that a mixed signal device analog to digital converters used for the processing of information and play a vital role in wireless sensors, Digital signal processing, Biomedical devices, in communication, IOT and various other applications. Across this broad use they give the significance in designing. The paper represents the various parameters like speed, area occupied, power consumption, sampling Rate, precision, Signal to noise ratio, Signal to noise distortion ratio, resolution, linearity and conversion time with respect to its different types and broad application in the real world. It defines errors due to non – linearity of signals as Differential nonlinearity, Integral nonlinearity, gain error, quantization error, aliasing and offset error. It also gives the comparative study about ADCs.

A BISECTION-BASED POWER REDUCTION DESIGN FOR CMOS FLASH ANALOG-TO-DIGITAL CONVERTERS

2009 ◽  
Vol 18 (05) ◽  
pp. 933-945
Author(s):  
CHIA-CHUN TSAI ◽  
KAI-WEI HONG ◽  
TRONG-YEN LEE
Keyword(s):  
Power Consumption ◽  
Supply Voltage ◽  
Clock Cycle ◽  
Sampling Rate ◽  
Reducing Power ◽  
Power Reduction ◽  
Analog To Digital Converters ◽  
Bisection Method ◽  
Flash Adc ◽  
Analog To Digital

In this paper, we present a bisection-based power reduction design for CMOS flash analog-to-digital converters (ADCs). A comparator-based inverter is employed along with two switches of an NMOS and a PMOS, the bisection method can let only half of comparators in a flash ADC work in every clock cycle for reducing power consumption. A practical example of 6-bit flash ADC operates at 200 MHz sampling rate and 3.3 V supply voltage is demonstrated. The power consumption of proposed circuit is only 40.75 mW with HSPICE simulation. Compared with the traditional flash ADC, our bisection method can reduce up to 43.18% in terms of power dissipation.

scholarly journals An Optical Analog-to-Digital Converter with Enhanced ENOB Based on MMI-Based Phase-Shift Quantization

Photonics ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 52
Author(s):  
Yue Liu ◽  
Jifang Qiu ◽  
Chang Liu ◽  
Yan He ◽  
Ran Tao ◽  
...  
Keyword(s):  
Phase Shift ◽  
Multimode Interference ◽  
Analog To Digital Converter ◽  
Effective Number ◽  
Digital Converter ◽  
Analog To Digital ◽  
Mmi Coupler ◽  
Simulation Results ◽  
Optical Analog ◽  
Optical Quantization

An optical analog-to-digital converter (OADC) scheme with enhanced bit resolution by using a multimode interference (MMI) coupler as optical quantization is proposed. The mathematical simulation model was established to verify the feasibility and to investigate the robustness of the scheme. Simulation results show that 20 quantization levels (corresponding to 4.32 of effective number of bits (ENOB)) are realized by using only 6 channels, which indicates that the scheme requires much fewer quantization channels or modulators to realize the same amount of ENOB. The scheme is robust and potential for integration.

Sign in / Sign up

Export Citation Format

Share Document