Quantization Error in Time-to-Digital Converters

Zaworski, Łukasz; Chaberski, Dariusz; Kowalski, Marcin; Zieliński, M.

doi:10.2478/v10178-012-0010-2

Cited by 6 publications

(12 citation statements)

References 7 publications

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“…3 are similar. Having in mind that the maximum current sunk by the microcontroller ports of PIC16F877 is 25mA, according to (11), the minimal sensor resistance that can be measured with the circuit given in Fig. 2a is 200 Ω.…”

Section: Resultsmentioning

confidence: 99%

“…2a is 200 Ω. On the other hand, the maximal continuous drain current of IRF7311 in [13] is 5.3 A, which according to (11) allows measurement of sensor resistances down to 1 Ω as long as such high pulse current does not damage the sensor or exceed the maximal allowed dissipation (self-heating).…”

Section: Resultsmentioning

confidence: 99%

“…When the start of the measured time interval is synchronous with the clock, as in the case with direct sensor-to-microcontroller interface, only the end of the period is affected by quantization. The corresponding quantization uncertainty is [11]:…”

Section: Resolutionmentioning

confidence: 99%

See 2 more Smart Citations

Hardware Techniques for Improving the Calibration Performance of Direct Resistive Sensor-to-Microcontroller Interface

Kokolanski¹,

Gavrovski²,

Dimčev³

et al. 2013

Metrology and Measurement Systems

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Direct sensor-to-microcontroller is a simple approach for direct interface of passive modulating sensors to a microcontroller without any active components in between the sensor and the microcontroller and without an analog to digital converter. The metrological performances of such interface circuits are limited by certain microcontroller parameters which are predetermined by the manufacturing technology. These limitations can be improved by specific hardware-related techniques and can improve the accuracy, speed and resolution of the measurements. Such hardware solutions as well as proper selection of the electrical components are addressed in this paper. It has been shown that employment of only a few MOSFET transistors can reduce the maximal relative error of single point calibration more than fifteen times and can increase the measuring speed around 30 % in all calibration techniques in the measurement range of PT1000 resistive temperature sensors. Moreover, the effective number of resolution bits increases by more than 1.3 bits when using an external comparator.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Hardware Techniques for Improving the Calibration Performance of Direct Resistive Sensor-to-Microcontroller Interface

Kokolanski¹,

Gavrovski²,

Dimčev³

et al. 2013

Metrology and Measurement Systems

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“…The single time interval measured by the TIMM can be described as: In the presented system, the excitation signal with the frequency of 1 MHz is created from the main clock signal (100 MHz). In such case, the uncertainty associated with quantization can be written as [15]:…”

Section: Input Circuit and Time Interval Measurement Methodsmentioning

confidence: 99%

Ultrasonic Flow Measurement with High Resolution

Grzelak

Czoków

Kowalski

et al. 2014

Metrology and Measurement Systems

Self Cite

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The ultrasonic flowmeter which is described in this paper, measures the transit of time of an ultrasonic pulse. This device consists of two ultrasonic transducers and a high resolution time interval measurement module. An ultrasonic transducer emits a characteristic wave packet (transmit mode). When the transducer is in receive mode, a characteristic wave packet is formed and it is connected to the time interval measurement module inputs. The time interval measurement module allows registration of transit time differences of a few pulses in the packet. In practice, during a single measuring cycle a few time-stamps are registered. Moreover, the measurement process is also synchronous and, by applying the statistics, the time interval measurement uncertainty improves even in a single measurement. In this article, besides a detailed discussion on the principle of operation of the ultrasonic flowmeter implemented in the FPGA structure, also the test results are presented and discussed.

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“…In addition to using the high-resolution ADC chips, some other technologies are used to obtain higher resolution. Oversampling and averaging methods are mentioned to improve the measurement resolution [7][8][9][10]. In this paper, a simple way which makes the reference to the oversampling and averaging theory is proposed to improve the acquisition accuracy of the multichannel acquisition system.…”

Section: Introductionmentioning

confidence: 99%

An Efficiency Multiplexing Scheme and Improved Sampling Method for Multichannel Data Acquisition System

Chu

Ren

Liu

et al. 2015

International Journal of Distributed Sensor Networks

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The paper proposes an efficient multiplexing scheme that is easy to realize synchronous sampling in a multichannel acquisition system with the large number of analogue inputs and different sampling rates. And then, a simple improved sampling control method is also employed to improve the performance. All the technology of implementing the method is by using a low-cost field programmable gate array (FPGA). A sampling lookup table is built by the rule-based synchronous sampling frame structure for the input analogue multiplexers and stored into the internal block RAM resource in the FPGA to reduce the internal wiring resources and optimize the utilization. The improved sampling method obtains several samples in a sampling period and gets the average value as the final output for the sampling channel. In addition, the standard sine wave FFT test method is implemented to test the dynamic parameters of the acquisition channels. The experiment results show that the dynamic performance of the acquisition system is significantly improved. The proposed multiplexing scheme and sampling method can easily be reconfigured for other applications.

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Quantization Error in Time-to-Digital Converters

Cited by 6 publications

References 7 publications

Hardware Techniques for Improving the Calibration Performance of Direct Resistive Sensor-to-Microcontroller Interface

Hardware Techniques for Improving the Calibration Performance of Direct Resistive Sensor-to-Microcontroller Interface

Ultrasonic Flow Measurement with High Resolution

An Efficiency Multiplexing Scheme and Improved Sampling Method for Multichannel Data Acquisition System

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