Title :
Analog Building Blocks for Organic Smart Sensor Systems in Organic Thin-Film Transistor Technology on Flexible Plastic Foil
Author :
Marien, Hagen ; Steyaert, Michiel S J ; Van Veenendaal, Erik ; Heremans, Paul
Author_Institution :
Dept. of Electr. Eng., Katholieke Univ. Leuven, Heverlee, Belgium
fDate :
7/1/2012 12:00:00 AM
Abstract :
In this work, we present the implementation and measurement results of all analog building blocks of an organic smart sensor system on foil. The presented building blocks are a 1D and a 2D 4 × 4 pixel flexible capacitive touch sensor with a sample rate of 1.5 kS/s, a DC-connected two-stage opamp with a 20 dB DC gain, a Dickson DC-DC up-converter with output bias voltages up to 60 V and down to - 40 V which are used as a bias voltage in the other building blocks, and a ΔΣ ADC with a 26.5 dB precision and a band width of 15.6 Hz. The sensors, the opamp, the DC-DC converter and the ADC respectively consume 6 μA, 15 μA, 1 μA and 100 μA from a 15 V power supply.
Keywords :
DC-DC power convertors; analogue-digital conversion; capacitive sensors; delta-sigma modulation; flexible electronics; intelligent sensors; operational amplifiers; organic semiconductors; plastics; tactile sensors; thin film transistors; ΔΣ ADC; 1D flexible capacitive touch sensor; 2D flexible capacitive touch sensor; DC-connected two-stage opamp; Dickson DC-DC up-converter; analog building block; bandwidth 15.6 Hz; current 1 muA; current 100 muA; current 15 muA; current 6 muA; flexible plastic foil; gain 20 dB; gain 26.5 dB; organic smart sensor system; organic thin-film transistor technology; output bias voltages; voltage 15 V; Capacitive sensors; Intelligent sensors; Tactile sensors; Temperature sensors; Transistors; Voltage measurement; Capacitive; DC-DC; delta-sigma; opamp; organic; pentacene; sensor; smart sensor; thin film;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2012.2191038
