A low-power piecewise linear analog to digital converter for use in particle tracking

1995 ◽  
Vol 42 (4) ◽  
pp. 772-775 ◽  
Author(s):  
V. Valencic ◽  
F. Anghinolfi ◽  
P. Deval ◽  
R. Bonino ◽  
D. La Marra ◽  
...  
Keyword(s):  
Low Power ◽  
Particle Tracking ◽  
Piecewise Linear ◽  
Analog To Digital Converter ◽  
Digital Converter ◽  
Analog To Digital ◽  
Linear Analog

scholarly journals An Improved Linearization Circuit Used for Optical Rotary Encoders

2017 ◽  
Vol 17 (5) ◽  
pp. 241-249 ◽  
Author(s):  
Jelena Jovanović ◽  
Dragan Denić ◽  
Uglješa Jovanović
Keyword(s):  
Piecewise Linear ◽  
Angular Position ◽  
Absolute Measurement ◽  
Analog To Digital Converter ◽  
Digital Converter ◽  
Optical Encoder ◽  
Two Stage ◽  
Analog To Digital ◽  
Linear Analog ◽  
Linear Signal

Abstract Optical rotary encoders generate nonlinear sine and cosine signals in response to a change of angular position that is being measured. Due to the nonlinear shape of encoder output signals, encoder sensitivity to very small changes of angular position is low, causing a poor measurement accuracy level. To improve the optical encoder sensitivity and to increase its accuracy, an improved linearization circuit based on pseudo-linear signal generation and its further linearization with the two-stage piecewise linear analog-to-digital converter is presented in this paper. The proposed linearization circuit is composed of a mixed-signal circuit, which generates analog pseudo-linear signal and determines the first four bits of the final digital result, and the two-stage piecewise linear analog-to-digital converter, which performs simultaneous linearization and digitalization of the pseudo-linear signal. As a result, the maximal value of the absolute measurement error equals to 3.77168·10−5 [rad] (0.00216°) over the full measurement range of 2π [rad].

scholarly journals A Novel Design Of An NTC Thermistor Linearization Circuit

2015 ◽  
Vol 22 (3) ◽  
pp. 351-362 ◽  
Author(s):  
Jelena Lukić ◽  
Dragan Denić
Keyword(s):  
Piecewise Linear ◽  
Analog To Digital Converter ◽  
Digital Converter ◽  
Two Stage ◽  
Residual Voltage ◽  
Analog To Digital ◽  
Temperature Range ◽  
Linear Analog ◽  
Ntc Thermistor ◽  
Novel Design

Abstract A novel design of a circuit used for NTC thermistor linearization is proposed. The novelty of the proposed design consists in a specific combination of two linearization circuits, a serial-parallel resistive voltage divider and a two-stage piecewise linear analog-to-digital converter. At the output of the first linearization circuit the quasi-linear voltage is obtained. To remove the residual voltage nonlinearity, the second linearization circuit, i.e., a two-stage piecewise linear analog-to-digital converter is employed. This circuit is composed of two flash analog-to-digital converters. The first analog-to-digital converter is piecewise linear and it is actually performing the linearization, while the second analog-to-digital converter is linear and it is performing the reduction of the quantization error introduced by the first converter. After the linearization is performed, the maximal absolute value of a difference between the measured and real temperatures is 0.014°C for the temperature range between −25 and 75°C, and 0.001°C for the temperature range between 10 and 40°C.

A novel time-based low-power pipeline analog to digital converter

2009 ◽  
Vol 62 (3) ◽  
pp. 281-289 ◽  
Author(s):  
Mohammad Hossein Zarifi ◽  
Javad Frounchi ◽  
Shahin Farshchi ◽  
Jack W. Judy
Keyword(s):  
Low Power ◽  
Analog To Digital Converter ◽  
Digital Converter ◽  
Analog To Digital
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