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Pil Seung Chung - IEEE Xplore Author Profile

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Next generation communication standardization is calling for more flexibility with an access to higher carrier frequencies and wider instantaneous bandwidth. We propose to tackle these challenges by introducing wideband data converter solutions capable to directly access the microwave spectrum up to Q-band (40 \mathrm{GHz}). After a proof of concept presented at EuMW 2021, a product has been dev...Show More
The miniaturization and cost reduction of a gas chromatograph is addressed in this paper, leveraging on nanoelectromechanical systems (NEMS) detectors and a mixed-signal integrated circuit. The instrument and chip architectures are thoroughly described, characterized, and compared to other approaches like thermal conductivity detectors (TCDs). The 28 nm CMOS circuit addresses the sequential and pa...Show More
Progress in silicon technology has promoted NEMS sensors as viable and highly sensitive candidates for gravimetric applications such as gas sensing, mass spectrometry and biochemical analysis [1]. The high sensitivity to mass is related to the small dimensions and intrinsic mass of the NEMS themselves, which results in resonant frequencies in the 10MHz-to-1GHz range and drive voltages reaching 1V ...Show More
A new discrete-time receiver architecture enables to specifically circumvent CMOS integration issues, taking advantage of ZIF architectures yet escaping impact of flicker noise and second-order front-end non-linearity. This architecture, compatible with further scaling, was implemented for a GSM receiver in 90-nm CMOS. This receiver occupies 1-mm2 core area, achieves -108-dBm sensitivity, and -16-...Show More
This paper discusses the development of a new kind of low power processing chain which dynamically adapts sampling frequency to signals. Thus, the design of an asynchronous analog-to-digital converter (A-ADC) is tackled. Its principle is based on a nonuniform sampling scheme and asynchronous technology that allow significant activity and power savings. A test chip targetting 10-bit speech applicat...Show More
A DVB-T tuner is integrated in 0.12 /spl mu/m CMOS. The 16mm/sup 2/ chip integrates a double conversion chain including PLL, VCO, voltage regulators, and ADC. The receiver exhibits a 6.5dB NF, a VCO phase noise of -140dBc/Hz at 1MHz offset at 1.21GHz, and a 14b ADC. It is compatible for integration with a digital demodulator IP.Show More
A fully CMOS integrated DVB_T RF analog tuner achieving a 6.5 dB noise figure is presented. The tuner is implemented in a 0.12 mum CMOS process and occupies a 16 mm2 area. The receiver is based on a double zero IF conversion and integrates within the receiver chain the frequency synthesizers and two 4 MHz bandwidth 14 bit analog digital converters. The VCO exhibits a -140 dBc phase noise at 1 MHz ...Show More
The 65 nm process has been optimized through thermal budget and implant of halo and LDD to reduce gate impact. It provides the best matching results ever reported to our knowledge, i.e. A/sub Vt/ of 2.1 and 1.9 mV./spl mu/m for NMOS and PMOS respectively. We demonstrate that such results provide relevant circuit performance improvement. For SRAM, a gain of more than 50% has been achieved on cell r...Show More
A dual-mode /spl Sigma//spl Delta/ modulator is designed to meet the specifications of a WCDMA/GPRS receiver and is composed of a single-bit second-order modulator followed by a multi-bit stage that adapts performance to broadband signals. The modulator achieves 82dB and 70dB of dynamic range over bandwidths of 100kHz and 1.92MHz, respectively, and dissipates 4.3mW from a 1.2V supply. The circuit ...Show More