Phototransistor based Time-of-Flight range finding sensor in an 180 nm CMOS process

2012 ◽  
Author(s):  
Plamen Kostov ◽  
Milos Davidovic ◽  
Michael Hofbauer ◽  
Wolfgang Gaberl ◽  
Horst Zimmermann
Keyword(s):  
Time Of Flight ◽  
Cmos Process ◽  
Range Finding ◽  
Flight Range

scholarly journals A Novel Ultrasonic TOF Ranging System Using AlN Based PMUTs

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 284
Author(s):  
Yihsiang Chiu ◽  
Chen Wang ◽  
Dan Gong ◽  
Nan Li ◽  
Shenglin Ma ◽  
...  
Keyword(s):  
Clock Cycle ◽  
High Accuracy ◽  
Ultrasonic Waves ◽  
Oxide Semiconductor ◽  
Average Error ◽  
Cmos Process ◽  
Clock Frequency ◽  
Time Frequency ◽  
Range Finding ◽  
Wide Range

This paper presents a high-accuracy complementary metal oxide semiconductor (CMOS) driven ultrasonic ranging system based on air coupled aluminum nitride (AlN) based piezoelectric micromachined ultrasonic transducers (PMUTs) using time of flight (TOF). The mode shape and the time-frequency characteristics of PMUTs are simulated and analyzed. Two pieces of PMUTs with a frequency of 97 kHz and 96 kHz are applied. One is used to transmit and the other is used to receive ultrasonic waves. The Time to Digital Converter circuit (TDC), correlating the clock frequency with sound velocity, is utilized for range finding via TOF calculated from the system clock cycle. An application specific integrated circuit (ASIC) chip is designed and fabricated on a 0.18 μm CMOS process to acquire data from the PMUT. Compared to state of the art, the developed ranging system features a wide range and high accuracy, which allows to measure the range of 50 cm with an average error of 0.63 mm. AlN based PMUT is a promising candidate for an integrated portable ranging system.

scholarly journals A power-saving modulation technique for time-of-flight range imaging sensors

2011 ◽  
Author(s):  
Richard M. Conroy ◽  
Adrian A. Dorrington ◽  
Andrew D. Payne ◽  
Rainer Künnemeyer ◽  
Michael J. Cree
Keyword(s):  
Time Of Flight ◽  
Power Saving ◽  
Range Imaging ◽  
Modulation Technique ◽  
Flight Range ◽  
Imaging Sensors

scholarly journals Improved measurement linearity and precision for AMCW time-of-flight range imaging cameras

2010 ◽  
Vol 49 (23) ◽  
pp. 4392 ◽  
Author(s):  
Andrew D. Payne ◽  
Adrian A. Dorrington ◽  
Michael J. Cree ◽  
Dale A. Carnegie
Keyword(s):  
Time Of Flight ◽  
Range Imaging ◽  
Flight Range
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