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Optica Publishing Group
  • Journal of Display Technology
  • Vol. 12,
  • Issue 11,
  • pp. 1444-1450
  • (2016)

Electric Hum Signal Readout Circuit for Touch Screen Panel Applications

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Abstract

This paper presents a new touch sensing mechanism that detects different signals on a touch panel generated by an electric field formed from household power. Without requiring complicated transmitter and receiver circuits, a 16-channel front-end sensor and shared readout circuits are proposed to realize the new touch-sensing mechanism. This touch-sensing technique can be applied on the appliance control panel to detect the operation control. The signal readout circuit is implemented in a 0.18-µm CMOS process, which occupied an area of 2.64 mm2. The proposed sensing technique achieves 46.5-dB signal-to-noise ratios with finger touch. With battery power supply of 1.8 V and 2.5 V, total power consumption of the proposed readout circuit is measured as just 2 mW.

© 2016 IEEE

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