In-Panel 31.17dB 140kHz 87μW Unipolar Dual-Gate In-Ga-Zn-O Charge-Sense Amplifier for 500dpi Sensor Array on Flexible Displays
conference paper
In this paper a charge sense amplifier (CSA) using a 5μm In-Ga-Zn-O transistor technology on 15μm thick flexible substrate is presented for readout of a 500dpi fingerprint sensor array targeting direct integration with active matrix organic light emitting displays (AMOLED). The CSA achieves a linear input range of 0.8V for rail to rail output at VDD=15V. The CSA comprises of a high gain and stable dual-ended output dual-stage amplifier. The n-type load is driven by a dual-stage buffer and start-up circuit to increase the performance and ensure stability. The amplifier operates down to 6V supply voltage. It achieves 31.17dB DC-gain, 140kHz gain-bandwidth, 53° phase margin and dissipates 87μW at 15V. The footprint of the CSA is 0.3mm2 and enables 1fps readout of 1 megapixel 500dpi sensor array. © 2018 IEEE.
Topics
amoledamplifiercsadisplaydual gateigzoimagerin-panelmetal-oxideAmplifiers (electronic)Display devicesFlexible displaysGallium compoundsImage sensorsLight amplifiersLight emissionMetalsZinc compoundsActive matrix organic light emitting displays (AMOLED)AM-OLEDDirect integrationDual gatesFingerprint sensorsFlexible substrateigzoMetal oxidesIndium compounds
TNO Identifier
843676
ISBN
9781538654040
Publisher
Institute of Electrical and Electronics Engineers Inc.
Article nr.
8494260
Source title
ESSCIRC 2018 - 44th IEEE European Solid State Circuits Conference, ESSCIRC 2018, 3 September 2018 through 6 September 2018
Pages
102-105
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