A 143$\,\times\,$ 81 Mutual-Capacitance Touch-Sensing Analog Front-End With Parallel Drive and Differential Sensing Architecture

@article{Miyamoto2015A18,
  title={A 143\$\,\times\,\$ 81 Mutual-Capacitance Touch-Sensing Analog Front-End With Parallel Drive and Differential Sensing Architecture},
  author={Masayuki Miyamoto and Mutsumi Hamaguchi and Akira Nagao},
  journal={IEEE Journal of Solid-State Circuits},
  year={2015},
  volume={50},
  pages={335-343}
}
This paper presents an analog front-end (AFE) IC for mutual capacitance touch sensing with 224 sensor channels in 0.18 μm CMOS with 3.3 V drive voltage. A 32-in touch sensing system and a 70-in one having 37 dB SNR for 1 mm diameter stylus at 240 Hz reporting rate are realized with the AFE. The AFE adopts a parallel drive method to achieve the large format and the high SNR simultaneously. With the parallel drive method, the measured SNRs of the AFE stay almost constant at a higher level… CONTINUE READING

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Publications citing this paper.
SHOWING 1-9 OF 9 CITATIONS

Capacitive Touch Systems With Styli for Touch Sensors: A Review

  • IEEE Sensors Journal
  • 2018
VIEW 4 EXCERPTS
CITES METHODS & BACKGROUND
HIGHLY INFLUENCED

References

Publications referenced by this paper.
SHOWING 1-5 OF 5 REFERENCES

Coding and its application in space communications

  • IEEE Spectrum
  • 1970
VIEW 6 EXCERPTS
HIGHLY INFLUENTIAL

Linear Device Value Estimating Method, Capacitance Detection Method, Integrated Circuit, Touch Sensor System, and Electronic Device

M. Miyamoto
  • Japan Patent 4927216, Feb. 17, 2012.
  • 2012
VIEW 1 EXCERPT