Single-ended amplifier-based touch readout circuit with immunity to display noise
Source abstract
Abstract
To suppress errors in a touch readout circuit due to display noise, differential sensing using fully differential amplifiers is widely used. However, conventional differential sensing methods require additional circuits or increase circuit complexity, thus increasing power consumption and circuit area or requiring additional dummy RX line on the touch panel. In this study, we propose a compact touch readout circuit composed of a single-ended amplifier while keeping the display noise suppression of differential sensing so as to minimize power consumption and circuit area increase and avoid the need for additional dummy RX line. The proposed touch readout circuit for is fabricated in circuit area of 0.4 mm2 with 0.35 µm 3.3 V CMOS process and measured for 10.1-inch touch panel on top of a TFT-LCD panel. With the proposed touch readout circuit, the signal-to-noise ratio (SNR) is improved by up to 13.1 dB compared to the conventional touch readout circuit using single-ended amplifiers.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Tactile and Sensory Interactions · Semiconductor Lasers and Optical Devices
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Electronic Engineering, Hanyang University, Seoul, South Korea
References (16)
Show source-provided references
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