30mA, Capless High PSRR LDO Regulator for RF and Analog Applications in TSMC 28nm
400kHz Touch Sensor Silterra 0.18 μm
It is based on an RC oscillator, in which the oscillation frequency is altered by the added capacitance when the user touches the capacitive button.
The IP is able to deal with 4 buttons in time multiplexed fashion. It consumes 200μm x 127μm in silicon.
The IP is easily portable to other technologies that include high resistivity poly resistors.
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Block Diagram of the 400kHz Touch Sensor Silterra 0.18 μm
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