A Highly Reliable, 5.8 GHz DSRC Wake-Up Receiver with an Intelligent Digital Controller for an ETC System

Ali, İmran; Asif, Muhammad; Rehman, Muhammad Riaz Ur; Khan, Danial; Yingge, Huo; Kim, Sung Jin; Pu, YoungGun; Yoo, Sang-Sun; Lee, Kang-Yoon

doi:10.3390/s20144012

Cited by 7 publications

(3 citation statements)

References 28 publications

(38 reference statements)

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“…Since, the pressure and temperature signals have very low frequencies of a few kHz, therefore, a low speed, high resolution SD-ADC is used for precise digitization of analog signals. The digital processing is more robust and reliable compared to analog processing [ 20 , 21 ]. Also, digital compensation processing is much easier and simpler than in analog techniques.…”

Section: Proposed Pressure Sensor Interface Architecture With Tempmentioning

confidence: 99%

A Highly Accurate, Polynomial-Based Digital Temperature Compensation for Piezoresistive Pressure Sensor in 180 nm CMOS Technology

Ali

Asif

Shehzad

et al. 2020

Sensors

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Recently, piezoresistive-type (PRT) pressure sensors have been gaining attention in variety of applications due to their simplicity, low cost, miniature size and ruggedness. The electrical behavior of a pressure sensor is highly dependent on the temperature gradient which seriously degrades its reliability and reduces measurement accuracy. In this paper, polynomial-based adaptive digital temperature compensation is presented for automotive piezoresistive pressure sensor applications. The non-linear temperature dependency of a pressure sensor is accurately compensated for by incorporating opposite characteristics of the pressure sensor as a function of temperature. The compensation polynomial is fully implemented in a digital system and a scaling technique is introduced to enhance its accuracy. The resource sharing technique is adopted for minimizing controller area and power consumption. The negative temperature coefficient (NTC) instead of proportional to absolute temperature (PTAT) or complementary to absolute temperature (CTAT) is used as the temperature-sensing element since it offers the best temperature characteristics for grade 0 ambient temperature operating range according to the automotive electronics council (AEC) test qualification ACE-Q100. The shared structure approach uses an existing analog signal conditioning path, composed of a programmable gain amplifier (PGA) and an analog-to-digital converter (ADC). For improving the accuracy over wide range of temperature, a high-resolution sigma-delta ADC is integrated. The measured temperature compensation accuracy is within ±0.068% with full scale when temperature varies from −40 °C to 150 °C according to ACE-Q100. It takes 37 µs to compute the temperature compensation with a clock frequency of 10 MHz. The proposed technique is integrated in an automotive pressure sensor signal conditioning chip using a 180 nm complementary metal–oxide–semiconductor (CMOS) process.

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Section: Proposed Pressure Sensor Interface Architecture With Tempmentioning

confidence: 99%

A Highly Accurate, Polynomial-Based Digital Temperature Compensation for Piezoresistive Pressure Sensor in 180 nm CMOS Technology

Ali

Asif

Shehzad

et al. 2020

Sensors

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“…2021, 21, x FOR PEER REVIEW 2 of 15 Figure 1 plots the top block diagram of highly integrated 5.8 GHz DSRC transceiver system. It satisfies the aforementioned requirements without any externally connected block like low-noise amplifier (LNA) and external power amplifier (PA) [3]. The main building blocks consists of a matching network (M.N), single pole double throw (SPDT) switch, an inductively generated low-noise amplifier (LNA) to amplify the input signal, a mixer (MIXER), a 12-bit ADC, a 12-bit DAC, a received signal strength indicator (RSSI), a variable gain amplifier (VGA) with a low pass filter (LPF) and power amplifier (PA) [4].…”

Section: Introductionmentioning

confidence: 99%

A Low-Power 12-Bit 20 MS/s Asynchronously Controlled SAR ADC for WAVE ITS Sensor Based Applications

Shehzad

Verma

Khan

et al. 2021

Sensors

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A low power 12-bit, 20 MS/s asynchronously controlled successive approximation register (SAR) analog-to-digital converter (ADC) to be used in wireless access for vehicular environment (WAVE) intelligent transportation system (ITS) sensor based application is presented in this paper. To optimize the architecture with respect to power consumption and performance, several techniques are proposed. A switching method which employs the common mode charge recovery (CMCR) switching process is presented for capacitive digital-to-analog converter (CDAC) part to lower the switching energy. The switching technique proposed in our work consumes 56.3% less energy in comparison with conventional CMCR switching method. For high speed operation with low power consumption and to overcome the kick back issue in the comparator part, a mutated dynamic-latch comparator with cascode is implemented. In addition, to optimize the flexibility relating to the performance of logic part, an asynchronous topology is employed. The structure is fabricated in 65 nm CMOS process technology with an active area of 0.14 mm2. With a sampling frequency of 20 MS/s, the proposed architecture attains signal-to-noise distortion ratio (SNDR) of 65.44 dB at Nyquist frequency while consuming only 472.2 µW with 1 V power supply.

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“…works require low power usage and may accomplish this via wake-up receivers/oscillators (cf. [15,16]); however, such systems generally do not require that the distributed sensors remain in phase coherence. In cases where this is required-such as the geoPebble system-a GPSDO such as we developed is needed.…”

Section: Introductionmentioning

confidence: 99%

Low-Power GPS-Disciplined Oscillator Module for Distributed Wireless Sensor Nodes

Boehmer

Bilén

2021

Electronics

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Many sensor systems, such as distributed wireless sensor arrays, require high-accuracy timing while maintaining low power consumption. Although the capabilities of chip-scale atomic clocks have advanced significantly, their cost continues to be prohibitive for many applications. GPS signals are commonly used to discipline local oscillators in order to inherit the long-term stability of GPS timing; however, commercially available GPS-disciplined oscillators typically use temperature-controlled oscillators and take an extended period of time to reach their stated accuracy, resulting in a large power consumption, usually over a watt. This has subsequently limited their adoption in low-power applications. Modern temperature-compensated crystal oscillators now have stabilities that enable the possibility of duty cycling a GPS receiver and intermittently correcting the oscillator for drift. Based on this principle, a design for a GPS-disciplined oscillator is presented that achieves an accuracy of 5 μs rms in its operational environment, while consuming only 45 mW of average power. The circuit is implemented in a system called geoPebble, which uses a large grid of wireless sensors to perform glacial reflectometry.

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A Highly Reliable, 5.8 GHz DSRC Wake-Up Receiver with an Intelligent Digital Controller for an ETC System

Cited by 7 publications

References 28 publications

A Highly Accurate, Polynomial-Based Digital Temperature Compensation for Piezoresistive Pressure Sensor in 180 nm CMOS Technology

A Highly Accurate, Polynomial-Based Digital Temperature Compensation for Piezoresistive Pressure Sensor in 180 nm CMOS Technology

A Low-Power 12-Bit 20 MS/s Asynchronously Controlled SAR ADC for WAVE ITS Sensor Based Applications

Low-Power GPS-Disciplined Oscillator Module for Distributed Wireless Sensor Nodes

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