A Highly Linear, Small-Area Analog Front End With Gain and Offset Compensation for Automotive Capacitive Pressure Sensors in 0.35-&lt;inline-formula&gt; &lt;tex-math notation="LaTeX"&gt;$\mu $ &lt;/tex-math&gt;&lt;/inline-formula&gt;m CMOS

Lee, Dong‐Soo; Tiwari, Honey Durga; Kim, Sang-Yun; Lee, Juri; Park, Hyung-Gu; Pu, YoungGun; Seo, Munkyo; Lee, Kang-Yoon

doi:10.1109/jsen.2014.2369471

Cited by 13 publications

(8 citation statements)

References 7 publications

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“…Compared with other similar work [20][21][22][23][24], this work consumes the least power (0.5mW), which is benefited from the low power consumption single-stage amplifier rather than powerhungry high-gain amplifiers used in other work. Compared with the work [21][22][23][24], this achieves the lowest gain error 0.07%. The work [20] has a better gain error (0.037%) than this work does, but its bandwidth is 36 times lower than that of this work.…”

Section: Discussionmentioning

confidence: 97%

“…In order to solve the problems of reduced gain accuracy in the SC-CVC and the undetermined pole in the integrator, (5) and (7) suggest that the amplifier with high gain A0 is essential. Thus one general solution is to directly improve the gain of the amplifier by using structures such as two-stage amplifier ( Fig.1 (c)) [17], [24], fold/double cascode [6], [10] and gain-boosted structure [9], [20], [23]. However, these amplifiers will increase the power consumption and supply voltage significantly, which is contradictory to the requirement of the low power consumption and low supply voltage mentioned in the 1 st paragraph of this section.…”

Section: Differential Capacitive Readout Circuit Using Oversampling Smentioning

confidence: 99%

“…This is achieved by sacrificing part of the charging current to compensate the charge loss due to the parasitic capacitance, which results in high power consumption (7mW). Both the reference [23] and the reference [24] employ digital calibration to reduce the gain error, which results in complex system due to the use of DAC and ADC. And thus the power consumption is higher than this work.…”

Section: Physical Verificationmentioning

confidence: 99%

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Differential Capacitive Readout Circuit Using Oversampling Successive Approximation Technique

Zhong

Lai

Song

et al. 2018

IEEE Trans. Circuits Syst. I

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This paper designs a close loop Σ-Δ readout circuit for differential MEMS accelerometer. A technique named oversampling successive approximation (OSA) is employed to build basic amplifiers and integrators. This technique can largely reduce the gain error and thus low gain amplifier such as single stage amplifier is allowed to be used. As a result, the power consumption and chip area are reduced. However, the OSA based amplifiers and integrators are vulnerable to the interference caused by charge injection and leakage current from the specific MOSFET switches. This drawback is analyzed in detail and the interference suppressing solutions are given. The OSA based readout circuit is fabricated in a commercial 0.18um BCD process. The measurement results show that the interference is reduced by 20dB in the circuit with interference suppressing solutions compared to the circuit without interference suppressing solutions. And the noise floor is 24ug/rtHz. The readout circuit achieves a 0.07% gain error with a low power consumption of 0.5mW and 9MHz sampling rate.

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Section: Discussionmentioning

confidence: 97%

Section: Differential Capacitive Readout Circuit Using Oversampling Smentioning

confidence: 99%

Section: Physical Verificationmentioning

confidence: 99%

See 1 more Smart Citation

Differential Capacitive Readout Circuit Using Oversampling Successive Approximation Technique

Zhong

Lai

Song

et al. 2018

IEEE Trans. Circuits Syst. I

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“…In the literature, several active methods using temperature element such as proportional to absolute temperature (PTAT), an analog-to-digital converter (ADC) and lookup tables are proposed [ 7 , 12 , 13 ]. A signal-conditioning integrated circuit (IC) is presented for piezoresistive pressure sensor in [ 7 , 13 ] in which temperature compensation incorporates on-chip PTAT used as the temperature element.…”

Section: Introductionmentioning

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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“…These sensors are being used for measuring pressure, temperature, position, angular rate, acceleration, comfort factors, etc. [9]. Until now, analog signals and techniques are the main source of communication between the ECU and actuators [10].…”

Section: Introductionmentioning

confidence: 99%

Design of a Low-Power, Small-Area AEC-Q100-Compliant SENT Transmitter in Signal Conditioning IC for Automotive Pressure and Temperature Complex Sensors in 180 Nm CMOS Technology

Ali

Rikhan

Kim

et al. 2018

Sensors

Self Cite

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In this paper, a low-power and small-area Single Edge Nibble Transmission (SENT) transmitter design is proposed for automotive pressure and temperature complex sensor applications. To reduce the cost and size of the hardware, the pressure and temperature information is processed with a single integrated circuit (IC) and transmitted at the same time to the electronic control unit (ECU) through SENT. Due to its digital nature, it is immune to noise, has reduced sensitivity to electromagnetic interference (EMI), and generates low EMI. It requires only one PAD for its connectivity with ECU, and thus reduces the pin requirements, simplifies the connectivity, and minimizes the printed circuit board (PCB) complexity. The design is fully synthesizable, and independent of technology. The finite state machine-based approach is employed for area efficient implementation, and to translate the proposed architecture into hardware. The IC is fabricated in 1P6M 180 nm CMOS process with an area of (116 μm × 116 μm) and 4.314 K gates. The current consumption is 50 μA from a 1.8 V supply with a total 90 μW power. For compliance with AEC-Q100 for automotive reliability, a reverse and over voltage protection circuit is also implemented with human body model (HBM) electro-static discharge (ESD) of +6 kV, reverse voltage of −16 V to 0 V, over voltage of 8.2 V to 16 V, and fabricated area of 330 μm × 680 μm. The extensive testing, measurement, and simulation results prove that the design is fully compliant with SAE J2716 standard.

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A Highly Linear, Small-Area Analog Front End With Gain and Offset Compensation for Automotive Capacitive Pressure Sensors in 0.35-<inline-formula> <tex-math notation="LaTeX">$\mu $ </tex-math></inline-formula>m CMOS

Cited by 13 publications

References 7 publications

Differential Capacitive Readout Circuit Using Oversampling Successive Approximation Technique

Differential Capacitive Readout Circuit Using Oversampling Successive Approximation Technique

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

Design of a Low-Power, Small-Area AEC-Q100-Compliant SENT Transmitter in Signal Conditioning IC for Automotive Pressure and Temperature Complex Sensors in 180 Nm CMOS Technology

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