A capacitive touch chipset with 33.9 dB charge-overflow reduction using amplitude-modulated multi-frequency excitation and wireless power and data transfer to an …
As the demand for high frame rate and SNR increases in capacitive touch systems (CTSs),
several driving methods have been reported [1],[5]. However, when excitation circuits
simultaneously send excitation signals V EXT s to multiple TX electrodes in order to increase
frame rate, the readout circuit suffers from charge overflow because of the superposition of V
EXT s. To prevent this, driving methods such as time-division [1],[5] and reduced-amplitude
excitation [3], and signal omitting and linear interpolation in the digital domain [4] have been …
several driving methods have been reported [1],[5]. However, when excitation circuits
simultaneously send excitation signals V EXT s to multiple TX electrodes in order to increase
frame rate, the readout circuit suffers from charge overflow because of the superposition of V
EXT s. To prevent this, driving methods such as time-division [1],[5] and reduced-amplitude
excitation [3], and signal omitting and linear interpolation in the digital domain [4] have been …
28.1 A capacitive touch chipset with 33.9 dB charge-overflow reduction using amplitude-modulated multi-frequency excitation and wireless power and data transfer to …
As the demand for high frame rate and SNR increases in capacitive touch systems (CTSs),
several driving methods have been reported [1],[5]. However, when excitation circuits
simultaneously send excitation signals V EXT s to multiple TX electrodes in order to increase
frame rate, the readout circuit suffers from charge overflow because of the superposition of V
EXT s. To prevent this, driving methods such as time-division [1],[5] and reduced-amplitude
excitation [3], and signal omitting and linear interpolation in the digital domain [4] have been …
several driving methods have been reported [1],[5]. However, when excitation circuits
simultaneously send excitation signals V EXT s to multiple TX electrodes in order to increase
frame rate, the readout circuit suffers from charge overflow because of the superposition of V
EXT s. To prevent this, driving methods such as time-division [1],[5] and reduced-amplitude
excitation [3], and signal omitting and linear interpolation in the digital domain [4] have been …
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