Search results for: Mauricio Velazquez Lopez

Items from 1 to 7 out of 7 results

article

P‐81: Multimodal Intelligent Display Backplane Blocks

Florian De Roose, Mauricio Velazquez Lopez, Hikmet Çeliker, Aris Siskos, more

SID Symposium Digest of Technical Papers > 55 > 1 > 1691 - 1694

The display of the future is multimodal, integrating optical sensors, RFID antennas, ultrasound transducers, etc. The sensors produce a large amount of redundant data, which should be preprocessed on the substrate, ideally on the backpanel. Control gates and select and data drivers need to be more configurable and partitionable to create operational flexibility. This paper presents various circuit...

article

11‐4: 3.55‐Watt Output Power LTPS TFT DCDC Converter for Actuators on Wearable Devices on Flexible Substrate

Nikolaos Papadopoulos, Mauricio Velazquez Lopez, Marc Ameys, T.C. Huang, more

SID Symposium Digest of Technical Papers > 54 > 1 > 132 - 135

In this work, a high‐power LTPS DCDC converter on flexible polyimide substrate is demonstrated. The diode‐based boost‐ converter upconverts its output voltage to 9V from a 3.3V source and can reliably supply a load range of 100mA to 400mA. The efficiency of the design is reaching 54.9%. The design contains 400.000 25μm/4.5μm TFTs, resulting in a complete footprint of 10.02cm². The DCDC converter...

article

45.3: Invited Paper: Going Towards High‐Resolution, Uniform AMOLED Displays with a High Brightness Range

Lynn Verschueren, Marc Ameys, Mauricio Velazquez Lopez, Anastasia Glushkova, more

SID Symposium Digest of Technical Papers > 52 > S2 > 549 - 552

Going towards high‐resolution, uniform displays with a high‐brightness range requires optimizations on different topics. This work presents an overview on this subject. To achieve a good uniformity, a compensation method is proposed using a 2T1C pixel circuit, compatible with high‐resolution requirements, improving uniformity by a factor 52.5. In order to further increase the achievable resolution,...

article

38‐4: A 2T1C AMOLED Display with External Compensation Reducing On‐Panel Current Variations to 0.079%

Lynn Verschueren, Marc Ameys, Mauricio Velazquez Lopez, Steve Smout, more

SID Symposium Digest of Technical Papers > 51 > 1 > 547 - 550

This paper presents a new compensation principle using a 2T1C pixel circuit. The implementation shows significant improvement in uniformity for all grey‐levels, due to compensation for both V_T and β‐factor variations. The resulting current variation after compensation in the characterized display area reaches values down to 0.079%.

chapter

Capacitance-to-digital converter based on power detection

Mauricio Velazquez Lopez, Yong-Chang Choi, Hyung-Joun Yoo

2015 International SoC Design Conference (ISOCC) > 105 - 106

2015 International SoC Design Conference (ISOCC)

High resolution capacitance-to-digital converters (CDC) usually have severe capacitance range limitations or high power consumption. This paper presents a power detection based 16-bit CDC with a maximum capacitance range superior to 1 nF and a capacitance resolution as small as 0.27 fF. This work's multi-stage power detector provides the CDC with three different sensitivity rates making it highly...

article

Multi-Standard Hybrid PLL With Low Phase-Noise Characteristics for GSM/EDGE and LTE Applications

Yong-Chang Choi, Yeon-Jung Seong, Young-Jin Yoo, Sang-Ki Lee, more

IEEE Transactions on Microwave Theory and Techniques > 2015 > 63 > 10-1 > 3254 - 3264

This paper presents a single-chip CMOS multi-standard frequency synthesizer for global system for mobile communications (GSM)/enhanced data rate for GSM evolution (EDGE) and long-term evolution (LTE) applications. Low phase-noise characteristics are achieved both in-band and out-of-band through a voltage-and-digitally controlled oscillator (VDCO) and digital calibration blocks. The proposed hybrid...

chapter

Multi sensor voltage signal conditioner with adaptive level shift and DC offset calibration on a single chip

Ji-Hoon Suh, Mauricio Velazquez Lopez, Jeong-Ho Park, Hyung-Joun Yoo

2014 International SoC Design Conference (ISOCC) > 80 - 81

2014 International SoC Design Conference (ISOCC)

This paper presents an adaptive signal conditioning method for multi sensors with initial voltage setting, offset calibration and signal amplification. The initial voltage setting process to VDD/2 (600 mV) by level shifters is implemented for adapting various sensor signals, even when the signal's frequency is of several Hz or its initial voltage is of several mV. Offset calibration is implemented...

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INFONA - science communication portal

Search results for: Mauricio Velazquez Lopez

P‐81: Multimodal Intelligent Display Backplane Blocks

11‐4: 3.55‐Watt Output Power LTPS TFT DCDC Converter for Actuators on Wearable Devices on Flexible Substrate

45.3: Invited Paper: Going Towards High‐Resolution, Uniform AMOLED Displays with a High Brightness Range

38‐4: A 2T1C AMOLED Display with External Compensation Reducing On‐Panel Current Variations to 0.079%

Capacitance-to-digital converter based on power detection

Multi-Standard Hybrid PLL With Low Phase-Noise Characteristics for GSM/EDGE and LTE Applications

Multi sensor voltage signal conditioner with adaptive level shift and DC offset calibration on a single chip

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INFONA - science communication portal

Search results for: Mauricio Velazquez Lopez

P‐81: Multimodal Intelligent Display Backplane Blocks

11‐4: 3.55‐Watt Output Power LTPS TFT DCDC Converter for Actuators on Wearable Devices on Flexible Substrate

45.3: Invited Paper: Going Towards High‐Resolution, Uniform AMOLED Displays with a High Brightness Range

38‐4: A 2T1C AMOLED Display with External Compensation Reducing On‐Panel Current Variations to 0.079%

Capacitance-to-digital converter based on power detection

Multi-Standard Hybrid PLL With Low Phase-Noise Characteristics for GSM/EDGE and LTE Applications

Multi sensor voltage signal conditioner with adaptive level shift and DC offset calibration on a single chip

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