scholarly journals A Mutual Capacitance Touch Readout IC with Synchronization in Touch and Mobile Display Driving for High Refresh Rate AMOLED Panels

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 922
Author(s):  
Seunghoon Ko
Keyword(s):  
System Architecture ◽  
Noise Suppression ◽  
Touch Screen ◽  
Horizontal Line ◽  
Time Sharing ◽  
Refresh Rate ◽  
Front End ◽  
Scan Rate ◽  
Mutual Capacitance ◽  
Analog Voltage

This paper presents a mutual capacitance touch readout IC architecture for 120 Hz high-refresh-rate AMOLED displays. In high-refresh-rate AMOLED panels, whole pixels in a horizontal line should be updated without any time-sharing with each other, leading to an amplified display noise on touch screen panel (TSP) electrodes. The proposed system architecture mitigates severe display noise by synchronizing the driving for the TSP and AMOLED pixel circuits. The proposed differential sensing technique, which is based on noise suppression in reference to mutual capacitance channels, minimizes common-mode display noise. In the front-end circuit, intrinsic circuit offset is cancelled by a chopping scheme, which correlates to the phase of the driving signals in the TSP driver and operating clocks of the front-end. Operating at a 120 Hz scan-rate, it reduces display noise by more than 11.6 dB when compared with the conventional single-ended TSP sensing method. With a built-in 130-nm CMOS, a prototype IC occupies an area of 8.02 mm2 while consuming 6.4-mW power from a 3.3 V analog voltage supply.

scholarly journals Concurrent Driving Method with Fast Scan Rate for Large Mutual Capacitance Touch Screens

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Mohamed Gamal Ahmed Mohamed ◽  
HyungWon Kim
Keyword(s):  
Conventional Method ◽  
Ambient Noise ◽  
Touch Screen ◽  
Experimental Results ◽  
Control Technique ◽  
Scan Rate ◽  
Mutual Capacitance ◽  
Rate Improvement ◽  
Snr Improvement ◽  
Touch Screens

A novel touch screen control technique is introduced, which scans each frame in two steps of concurrent multichannel driving and differential sensing. The proposed technique substantially increases the scan rate and reduces the ambient noise effectively. It is also extended to a multichip architecture to support excessively large touch screens with great scan rate improvement. The proposed method has been implemented using 0.18 μm CMOS TowerJazz process and tested with FPGA and AFE board connecting a 23-inch touch screen. Experimental results show a scan rate improvement of up to 23.8 times and an SNR improvement of 24.6 dB over the conventional method.

scholarly journals Designing An Application of Software Project Management By Using Framework Scrum (SPM-Scrum)

2021 ◽  
Vol 6 (1) ◽  
pp. 25
Author(s):  
Nurudin Santoso ◽  
Faizatul Amalia
Keyword(s):  
Data Analysis ◽  
Software Development ◽  
System Architecture ◽  
Development Projects ◽  
Software Project ◽  
Or Management ◽  
Main Obstacle ◽  
Front End ◽  
System Architecture Design ◽  
Thesis Work

Most of failures of startup application in many countries reached 75%, while the startup failures in Indonesia reached 90%. These failures were caused by non-technical or management factors in managing startup. The RPL (Software Engineering) Laboratory of FILKOM of Brawijaya University has a roadmap to develop an application to guarantee the success of a management software project. The data analysis had been performed on FILKOM student’s thesis work which generally develops software that has main obstacle in the management. A study solution which was developed through scientific SDLC and PMLC combined with Scrum method becomes an application named SPM-SCRUM. The results of analysis carried out on several software development projects refer to the Iterative SDPM process. Furthermore, the strategy of Iterative SDPM combined with Scrum method produces a system architecture design that separates the Front End and Back End

scholarly journals A Demodulation Circuit For Analog Front End Of Passive Tag Chip

2021 ◽  
Vol 2065 (1) ◽  
pp. 012007
Author(s):  
Qinglong Li ◽  
Yong Xu ◽  
Qiao Li ◽  
Kun Peng ◽  
Xian Zhang
Keyword(s):  
Noise Suppression ◽  
Modulation Depth ◽  
Signal Frequency ◽  
Cmos Process ◽  
Uhf Rfid ◽  
Passive Uhf Rfid ◽  
Average Value ◽  
Front End ◽  
Analog Front End ◽  
Detection Circuit

Abstract The demodulation circuit designed in this paper is suitable for the analog front end of passive UHF RFID tag chip, which can handle ASK signals with large changes in amplitude, modulation depth and signal frequency. Its performance meets the requirements of standards ISO/IEC 18000-6C and GB/T 29768-2013. Envelope detection circuit and limiter circuit are simple in structure and do not consume power. The comparison reference voltage is taken according to the average value of the envelope high and low levels, and is less affected by the dynamic changes of the input signal. Changing the width-to-length ratio of the MOSFETs in the feedback path of the comparator can adjust the hysteresis, with strong noise suppression and controllable sensitivity. The demodulator is implemented with TSMC 0.18 μm standard CMOS process. The simulation results show that the ASK signal modulation depth that the demodulator can handle is as low as 30%, and the maximum pulse width demodulation error is only 0.43%.

scholarly journals Multi-channel reconfigurable front-end architecture for waveform-agile radar

2013 ◽  
Vol 5 (3) ◽  
pp. 419-428
Author(s):  
Giacomo Calabrese ◽  
Lorenzo Pagli ◽  
Oleg A. Krasnov ◽  
Alexander G. Yarovoy
Keyword(s):  
System Architecture ◽  
Preliminary Results ◽  
Systems Implementation ◽  
Radar Systems ◽  
Front End ◽  
The Status ◽  
Support Research

This paper presents the design of a multi-channel reconfigurable front-end architecture for a waveform-agile radar. At first the purpose of the design is explained following the status of research on software-defined radar at MTSR. A description of the proposed system architecture is given with details on sub-systems implementation. Then some preliminary results obtained on a prototype of the platform are shown. Finally, further developments on this system architecture are described, highlighting how this platform can support research on software-defined multi-channel radar systems.

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