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Ting Guo - IEEE Xplore Author Profile

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An ISM 915-MHz FSK transceiver for low power internet-of-things (IoT) applications is presented in this paper. The system supports a shared antenna interface of FSK-matched filter for TRX and a matching network for the FSK RX. To consume less power, the transmitter employs an adaptive fast switching technique for FSK modulator, and uses a high-Q MEMS resonator to get frequency stability. In additi...Show More
A 12th-order active-RC bandpass filter (BPF) for a synthetic aperture radar (SAR) receiver is presented in this paper. The proposed BPF is composed of six cascaded Biquads and each Biquad is configured as a second-order bandpass stage and the switched resistor and capacitor arrays are used in the Biquad to enable the digital control of the passband center frequency and bandwidth. To achieve desire...Show More
A novel mixed-signal adaptable silicon-based coherent photoacoustic (PA) sensing system-on-chip (SoC) is proposed to detect various kinds of target signals robustly under high noise and strong interferences in compact chip-level, attaining precise in vivo sensing for physiological signs monitoring and enhanced bio-imaging. Based on the configurable coherent PA sensing SoC architecture supported by...Show More
A floating-body transistor based two stages power amplifier (PA) with lateral NPN based bandgap voltage reference (BVR) is implemented in a 130 nm Silicon-On-Insulator (SOI) CMOS process for sub-6GHz 5G applications. Floating-body (FB) transistors instead of traditional body-contacted (BC) transistors have been adopted in driver stage and power stage amplifiers of the proposed PA. On-chip input an...Show More
Recently, there is an increasing demand for better in-band(IB) and out-of-band(OOB) linearity for sub-6GHz applications [1 – 3]. To achieve high linearity, one solution is to utilize current-mode direct conversion [1]. In this architecture, the low-noise amplifier (LNA) acts as a transconductor, which avoids large voltage gain, thus achieving high linearity. Another solution is to employ mixer-fir...Show More
The noise figure (NF) of the low-noise amplifier (LNA), located at the forefront of wideband receivers, directly influences the total NF of the receiver. A popular approach to suppress the noise of the input transistor to decrease the LNA NF is to utilize a noise-cancelling (NC) technique, where the main amplifier provides input matching, while the auxiliary amplifier removes the noise of the main...Show More
This paper presents a 2.4-6 GHz highly integrated broadband GaN power amplifier (PA) with three stages for 2.4-/5-GHz dual-band 802.11ax application. A compact external output matching network is introduced to realize broadband output matching, while reducing the loss of the output matching network and saving the chip area. A novel topology of coupled resonators is exploited for the broadband inte...Show More
A 1GHz configurable chirp modulation (CM) direct digital frequency synthesizer (DDFS) is presented and implemented in 65nm CMOS technology. This DDFS is designed to generate 70-86MHz chirp signal for X-band frequency modulated continuous wave (FMCW) radar system. The proposed design is composed of 64-bit frequency control word (FCW) serial peripheral interface bus (SPI) supported 20-bit frequency/...Show More
With continuous exploitation of sub-6GHz wireless communication standards and the advent of 5G and 6G, the demand for faster speed and wider coverage keeps evolving. While it is expected to utilize higher working frequency to provide larger bandwidth, lower noise Figure (NF) is also preferred to achieve better sensitivity or wider coverage. A straightforward solution to achieve a low NF is to empl...Show More
Smart sensing provides comprehensive and effective environment information through complementary signals in data acquisition. As an emerging solution, the multimodal sensing becomes essential and boosts applications in automotive, defence, transportation, life-rescue, and hazard identification, etc. [1]. X-band RADAR exhibits a good balance between free-space loss and directivity, providing bandwi...Show More
This paper presents low insertion loss, high isolation, ultra wideband double-pole-double-throw (DPDT) switch matrix designed with novel device structures in a commercial $0.13\ \mu\mathrm{m}$ high resistivity trap-rich SOI. The switches are designed using series-shunt-series configuration in a ring-type with input and output matching networks. The designed switches achieve widest bandwidth from D...Show More
High current, small area, and superior transient response LDO is gaining increasing attention for the battery-powered 5G mobile application. This paper presents an NMOS LDO realized in 0.13μm CMOS process featuring a 10mV undershoot and overshoot with 1A/100ns load current. The superior transient performance is achieved by a new multi-loop feedback scheme. The presented LDO also embodies a new fre...Show More
Using on-chip slow-wave transmission line (SW-TL) has paved a new way towards millimeter-wave (mm-wave) to terahertz (THz) low power and high speed inter-/intra-chip communications. This work presents an on-chip SW-TL featured by periodic comb-shape grooves with capability to strongly localize electric-field. A gradient groove structure is proposed to serve as the mode converter and performs the m...Show More
A pulsed chirping phased-array transceiver (TRX) is demonstrated for X-band synthetic aperture radar (SAR) application. The phased-array TRX is implemented on a single CMOS chip with beamsteering/beamforming capabilities. The chip-scale radar TRX is composed of four transmitters (TXs) and four receivers (RXs) operating at 10-GHz center frequency with 1-GHz bandwidth (BW). To achieve the wideband b...Show More
Compact low dropout (LDO) with high current handling capability and superior transient response is gaining increasing attention for the battery-powered 5G mobile applications. In this article, a new multiple-loop design technique for fast-transient response LDO regulator design has been proposed and successfully implemented in a 0.13-μm SOI CMOS process for portable smartphone and tablet PC applic...Show More
In this article, an X -band complementary metal-oxide-semiconductor (CMOS)-integrated phased-array radar sensor is proposed to enable the subject localization and multimodal vital sign monitoring. With the accurate beam-steering (ABS) technique realized by both true-time delay and phase shifting at the transmitter, the phased-array radar sensor achieves 60° steering coverage for the locating and m...Show More
The paper presents two radar transceivers operating at Ku-band. These radar transceivers are of complete design employing blocks from frontend to backend and support high-resolution synthetic aperture radar imaging, aiming at the application in human activity sensing. Frequency-modulated continuous wave scheme is adopted for both radar transceivers, free of range-ambiguity while taking the advanta...Show More
A conceptual digital-enhanced chip-scale radar sensor is proposed in the paper, where a novel quadrature interferometric phase analysis algorithm is proposed to be leveraged to enhance the performance of a radar system on monitoring tiny physiological signs. The radar sensor has the potential to achieve localization on target subject and monitoring of multi-modal physiological signs through the in...Show More
Monolithic integration of photoacoustic (PA) sensor with compact size, lightweight, and low power consumption is attractive to be implemented on wearable medical devices for in vivo blood metabolic sensing and imaging. This work presents a miniaturized chip-scale mixed-signal photoacoustic sensor system which can achieve coherent lock-in function to detect weak target PA signals noninvasively at i...Show More
The paper presents a two-stage cascade push-pull power amplifier (PA) with floating-body transistors in 130 nm Silicon-On-Insulator (SOI) CMOS process for IEEE 802.11ac application. In the proposed design, on chip baluns, which can realize impedance matching, are used in driver stage amplifier input and power stage amplifier output matching networks. The proposed PA can achieve high gain, high out...Show More
In this paper, a delay locked loop (DLL) based configurable multi-phase clock generator with wide operating range and high resolution is proposed. It is implemented by adopting array of configurable DLLs and is able to generate multi-phase frequencies with true-time-delay, which is essential in a wideband FMCW phased array system. Fabricated in a 40nm CMOS process, the proposed multi-phase clock g...Show More
The paper presents a wideband, low-power chirp synthesizer for Ku-band FMCW radars. The DDS-driven ADPLL chirp synthesizer generates chirps up to 2GHz bandwidth. A low-power DDS is employed to generate a stepped reference frequency for ADPLL to ensure the long term chirp linearity, while the ADPLL fulfill the ramp-interpolating linearization by generating a narrow band chirp within the step freque...Show More
Airborne or spaceborne synthetic aperture radar (SAR) targeted for micro-unmanned aerial vehicles (UaV) or micro-satellites is capable of observing large area under all weather conditions with strong penetration, and finds many emerging applications in defence, geology, oceanography, agriculture and other areas [1]. Phased-array SAR, operating in three modes of spotlight, stripmap and scanSAR, can...Show More