Process Compensation Loops for High Speed Ring Oscillators in Sub-Micron CMOS

Zhang, Xuan; Mukadam, Mustansir; Mukhopadhyay, I.; Apsel, Alyssa

doi:10.1109/jetcas.2011.2135530

Cited by 9 publications

(2 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Both bandwidths are around

, which is the readout clock frequency. Those bandwidths were obtained from other works [ 70 , 71 , 72 , 73 ] regarding frequency clock variations in digital circuits designed in a CMOS process with the same feature size. The best-case value comes from thermal drift variation studies [ 70 , 71 ] and the worst case, from Monte Carlo analyses [ 72 , 73 ].…”

Section: Results and Discussionmentioning

confidence: 99%

Current-Mode Self-Amplified CMOS Sensor Intended for 2D Temperature Microgradients Measurement and Imaging

Santos

Monteiro

Salles

2020

Sensors

View full text Add to dashboard Cite

This paper presents the design of a current-mode CMOS self-amplified imager operating in dark conditions, for thermal imaging, which provides an innovative solution for precision thermal contact mapping. Possible applications of this imager range from 3D CMOS integrated circuits to the study of in-vivo biological samples. It can provide a thermal map, static or dynamic, for the measurement of temperature microgradients. Some adaptations are required for the optimization of this self-amplified image sensor since it responds exclusively to the dark currents of the photodiodes throughout the array. The sensor is designed in a standard CMOS process and requires no post-processing steps. The optimized image sensor operates with integration times as low as one μs and can achieve both SNR and dynamic range compatible to those of sensors available on the market, estimated as 87dB and 75dB, respectively; noise equivalent temperature difference can be as low as 10mK; and detection errors as low as ±1%. Furthermore, under optimal conditions the self-amplification process enables a simple form of CDS, enhancing the overall sensor noise performance.

show abstract

“…Both bandwidths are around

Section: Results and Discussionmentioning

confidence: 99%

Current-Mode Self-Amplified CMOS Sensor Intended for 2D Temperature Microgradients Measurement and Imaging

Santos

Monteiro

Salles

2020

Sensors

View full text Add to dashboard Cite

show abstract

“…Once the PLL is started, frequency drifts caused by extreme temperature variations could push the control voltage of the VCO out of the fine-tuning range, causing the PLL to become out of lock. Although temperature-related frequency drifts can be compensated by schemes such as tuning the tail current [23,24] and adding extra compensation loops [25], these methods lead to complex designs and extra area. To compensate the temperature drift with minimum circuitry, an N-well resistor which exhibits positive TC is employed.…”

Section: Frequency Synthesizer With Temperature Compensationmentioning

confidence: 99%

A Low-Power CMOS Wireless Acoustic Sensing Platform for Remote Surveillance Applications

Wang

Zhou

Liu

et al. 2019

Sensors

View full text Add to dashboard Cite

A low-power wireless acoustic sensing platform for remote surveillance applications based on a 180 nm CMOS technology is proposed in this paper. The audio signal, which is acquired by a microphone, is first amplified and filtered. Then, the analog signal is converted to a digital signal by a 10-bit analog-to-digital converter (ADC). A digital automatic gain control module is integrated to obtain an optimal input of the ADC. The digital signal is modulated and transmitted at the 433 MHz ISM band after being repacked and encoded. To save power for portable applications, the chip switches to standby mode when no audio is detected. The wireless sensing platform occupies a chip area of 1.76 mm 2 . The supply voltage is 2.5 V for the power amplifier and 1.8 V for other circuits. The measured maximum output power is 5.7 dBm and the transmission distance is over 500 m for real application scenarios. The chip consumes 25.1 mW power in normal work mode and 0.058 mW in standby mode. Compared to existing wireless acoustic sensors, the proposed wireless acoustic sensing platform can achieve features such as compactness, power efficiency, and reliability.

show abstract

A ±3.07% frequency variation clock generator implemented using HV CMOS process

Wang

Sung

et al. 2015

Microelectronics Journal

View full text Add to dashboard Cite

Process Compensation Loops for High Speed Ring Oscillators in Sub-Micron CMOS

Cited by 9 publications

References 25 publications

Current-Mode Self-Amplified CMOS Sensor Intended for 2D Temperature Microgradients Measurement and Imaging

Current-Mode Self-Amplified CMOS Sensor Intended for 2D Temperature Microgradients Measurement and Imaging

A Low-Power CMOS Wireless Acoustic Sensing Platform for Remote Surveillance Applications

A ±3.07% frequency variation clock generator implemented using HV CMOS process

Contact Info

Product

Resources

About