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Zhicheng Lin

Bio: Zhicheng Lin is an academic researcher from University of Macau. The author has contributed to research in topics: Operational transconductance amplifier & Voltage-controlled oscillator. The author has an hindex of 9, co-authored 19 publications receiving 296 citations. Previous affiliations of Zhicheng Lin include University of Lisbon & South China Normal University.

Papers
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Journal ArticleDOI
TL;DR: A gain-boosted N- path SC bandpass filter (GB-BPF) with a number of sought features, based on a transconductance amplifier with an N-path SC branch as its feedback network, offering double RF filtering at the input and output of the Gm in one step and reduced physical capacitance thanks to the loop gain offered by Gm.
Abstract: The demand of highly-integrated multi-band transceivers has driven the development of blocker-tolerant software-defined radios that can avoid the cost (and loss) of the baluns and SAW filters [1, 2, 3].

61 citations

Journal ArticleDOI
TL;DR: A 2.4 GHz ZigBee receiver unifying a balun-LNA-I/Q-mixer (Blixer) and a baseband (BB) hybrid filter in one cell is fabricated in 65 nm CMOS, and most performance metrics compare favorably with the state-of-the-art.
Abstract: A 2.4 GHz ZigBee receiver unifying a balun-LNA-I/Q-mixer (Blixer) and a baseband (BB) hybrid filter in one cell is fabricated in 65 nm CMOS. Without any external components, wideband input matching and passive pre-gain are concurrently achieved via co-optimizing an integrated low-Q network with a balun-LNA. The latter also features active-gain boosting and partial-noise canceling to enhance the gain and noise figure (NF). Above the balun-LNA are I/Q double-balanced mixers driven by a 4-phase 25% LO for downconversion and gain-phase balancing. The generated BB currents are immediately filtered by an IF-noise-shaping current-mode Biquad and a complex-pole load, offering first-order image rejection and third-order channel selection directly atop the Blixer. Together with other BB and LO circuitries, the receiver measures 8.5 dB NF, 57 dB gain and $-$ 6-dBm IIP3 $_{{\rm out}\mathchar"702D{\rm band}}$ at 1.7 mW power and 0.24 mm $^{2}$ die size. The S $_{11}$ -bandwidth ( ${ 10 dB) covers 2.25 to 3.55 GHz being robust to packaging variations. Most performance metrics compare favorably with the state-of-the-art.

61 citations

Journal ArticleDOI
TL;DR: To address the cost and universality of ultra-low-power (ULP) radios for Internet of Things (IoT) applications, a sub-GHz multi-ISM-band ZigBee receiver is developed, featuring a gain-boosted N-path switched-capacitor network embedded into a function-reuse RF front-end, offering concurrent RF and BB amplification, LO-defined RF filtering, and input impedance matching with zero external components.
Abstract: Internet of Things (IoT) represents a competitive and large market for short-range ultra-low-power (ULP) wireless connectivity [1, 2]. According to [3], by 2020 the IoT market will be close to hundreds of billion dollars (annually ~16 billions). To bring down the hardware cost of such massive inter-connections, sub-GHz ULP wireless products compliant with the existing wireless standard such as the IEEE 802.15.4c/d (ZigBee) will be of great demand, especially for those that can cover all regional ISM bands [e.g., China (433 MHz), Europe (860 MHz), North America (915 MHz) and Japan (960 MHz)]. Together with the obvious goals of small chip area, minimum external components and ultra-low-voltage (ULV) supply (for possible energy harvesting), the design of such a receiver poses significant challenges.

48 citations

Proceedings ArticleDOI
19 Mar 2015
TL;DR: RF-tunable blocker-tolerant receivers (RXs) enhance the flexibility of multiband multistandard radios at low cost by frequency-translating the BB lowpass response to RF as bandpass and N-path RF filtering and noise cancellation are concurrently attained.
Abstract: RF-tunable blocker-tolerant receivers (RXs) enhance the flexibility of multiband multiStandard radios at low cost (Fig. 2.4.1). The mixer-first RX [1] delays the signal amplification to baseband (BB) by frequency-translating the BB lowpass response to RF as bandpass. This raises the out-of-band (OB) IIP3 (27dBm) at the expense of NF (5.5dB) and power (60mW) due to no RF gain. The noise-cancellation RX [2] breaks such a tradeoff by paralleling a voltage-sensing RX with the mixer-first RX. This achieves a better pair of NF (1.9dB) and OB-IIP3 (13.5dBm), but sacrifices more die size (1.2mm2) and power ( DD (2.5V) to widen the voltage headroom. Also, seeing that its NF (4.6dB) is handicapped by the input-impedance matching requirement (S„<-10dB), there is no flexibility to get better NF. Finally, as both [2] and [3] involve two mixing steps, the LO power is penalized.

41 citations

Proceedings ArticleDOI
28 Mar 2013
TL;DR: Nanoscale CMOS offers sufficiently high ft and low Vt favoring the design of ultra-low-power wireless receivers (RX) via stacking the RF-to-BB functions in one cell, while sharing the smallest possible bias current.
Abstract: Nanoscale CMOS offers sufficiently high ft and low Vt favoring the design of ultra-low-power wireless receivers (RX) via stacking the RF-to-BB functions in one cell, while sharing the smallest possible bias current. Also, the signals can be conveyed in the current domain to enhance the area efficiency (i.e., no AC-coupling capacitor), RF bandwidth and linearity at those inner nodes. The 2.4GHz LMV cell [1] for ZigBee RX is an example that unifies one LNA, two mixers (I/Q) and one VCO. The power is low (2.4mW), but the NF, gain and S11 are sensitive to its external high-Q inductor that performs narrowband input match and passive gain boost. Although one VCO (i.e., one inductor) can save area and power, the I/Q generator has to be placed in the RF path. Realized as a gm-C network, it suffers from a 3dB gain loss deteriorating the RX NF (12dB), while rendering the I/Q accuracy more susceptible to process variation.

30 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, the authors present a solution manual for the design of radio frequency integrated circuits (RFIC) solution manual, which can be found in the ePUB format.
Abstract: The Design Of Cmos Radio Frequency Integrated Circuits Solution Manual *FREE* the design of cmos radio frequency integrated circuits solution manual 4. RESISTA N CE . RESISTORS AND RESISTOR CIRCUITS Resistance is the op position to current flow in various degrees. The practical unit of resistance is called the ohm. A resistor on one ohm is physically very large but provides only a small resistance to current flow.The Design Of Cmos Radio Frequency Integrated Circuits the design of cmos radio frequency integrated circuits solution manual The Design Of Cmos Radio Frequency Integrated Circuits Solution Manual The Design Of Cmos Radio Frequency Integrated Circuits Solution Manual FREE the design of cmos radio frequency integrated circuits solution manual 4 RESISTA N CE Read The Design Of Cmos Radio Frequency Integrated Free Download Books The Design Of Cmos Radio Frequency Integrated Circuits Solution Manual You know that reading The Design Of Cmos Radio Frequency Integrated Circuits Solution Manual is beneficial because we are able to get a lot of information in the reading materials The design of cmos radio frequency integrated circuits Download The design of cmos radio frequency integrated circuits solution manual in EPUB Format In the website you will find a large variety of ePub PDF Kindle AudioBook and books Such as manual user assist The design of cmos radio frequency integrated circuits solution manual ePub comparison suggestions and The Design Of CMOS Radio Frequency Integrated Circuits The Design of CMOS Radio Frequency Integrated Circuits Solutions Manual Solutions Manuals are available for thousands of the most popular college and high school textbooks in subjects such as Math Science Physics Chemistry Biology Engineering Mechanical Electrical Civil Business and more The Design of CMOS Radio Frequency Integrated Circuits The Design of CMOS Radio Frequency Integrated Circuits Second Edition The last chapter will provide a trip down memory lane for some readers—a sampling of circuits of particular interest in RF history including the Regency TR 1 transistor radio design and the three transistor cicuit that created the first toy walkie talkie in 1962 PDF The Design of CMOS Radio Frequency Integrated PDF Student Solutions Manual Chapters 1 11 for Stewarts Single Variable Calculus Early Transcendentals 7th By James Stewart P D F PDF The Beginning Questions to Dr Malachi Z York El About By Malachi Z York El pdf PDF The Design of CMOS Radio Frequency Integrated PDF The Design of CMOS Radio Frequency Integrated Circuits Second Edition 2 DESCRIPTION This expanded and thoroughly revised edition of Thomas H Lee s acclaimed guide to the design of gigahertz RF integrated circuits features a completely new chapter on the principles of wireless systems The Design of CMOS Radio Frequency Integrated Circuits Chapter 2 Basic MOS Device Physics In studying the design of integrated circuits one of two extreme approaches can b Design of Analog CMOS Integrated Circuits Chap 3 I X1 X2 Single Stage Amplifiers Figure 3 1 Input output characteristic of a nonlinear system The Design of CMOS Radio Frequency Integrated Circuits The Design of CMOS Radio Frequency Integrated Circuits Second Edition Thomas H Lee on Amazon com FREE shipping on qualifying offers This expanded and thoroughly revised edition of Thomas H Lee s acclaimed guide to the design of gigahertz RF integrated circuits features a completely new chapter on the principles of wireless systems The chapters on low noise amplifiers The Design of CMOS Radio Frequency Integrated Circuits by The Design of CMOS Radio Frequency

213 citations

Book ChapterDOI
01 Jan 2003
TL;DR: In this paper, an expanded and thoroughly revised edition of Thomas H. Lee's acclaimed guide to the design of gigahertz RF integrated circuits features a completely new chapter on the principles of wireless systems.
Abstract: This expanded and thoroughly revised edition of Thomas H. Lee's acclaimed guide to the design of gigahertz RF integrated circuits features a completely new chapter on the principles of wireless systems. The chapters on low-noise amplifiers, oscillators and phase noise have been significantly expanded as well. The chapter on architectures now contains several examples of complete chip designs that bring together all the various theoretical and practical elements involved in producing a prototype chip. First Edition Hb (1998): 0-521-63061-4 First Edition Pb (1998); 0-521-63922-0

207 citations

Journal ArticleDOI
TL;DR: All of the key specification of CMOS passive mixers can be described in terms of an impedance ratio, a characteristic cut-off frequency, the number of phases of the mixer and some process-related parameters, and how these properties relate to power consumption of LO circuitry is discussed.
Abstract: Recent developments in CMOS passive mixers have demonstrated a number of new and useful capabilities, including dynamic RF port impedance control and filter up-conversion, while also allowing low noise figure and high out-of-band linearity, all of which track wide-ranging LO frequencies and tunable baseband bandwidth. However, these circuits also bring a unique set of challenges and requirements. Here we extend a previously derived LTI model for such mixers to the general N-phase case, and discuss basic limits in performance specifications including impedance matching, noise figure and linearity. We then extend this analysis to include high-frequency effects, especially as they relate to transistor properties. We show that essentially all of the key specification of such mixers can be described in terms of an impedance ratio, a characteristic cut-off frequency, the number of phases of the mixer and some process-related parameters. Finally, we discuss how these properties relate to power consumption of LO circuitry.

97 citations

Journal ArticleDOI
Benqing Guo, Jun Chen, Lei Li, Haiyan Jin, Guoning Yang1 
TL;DR: A complementary noise-canceling CMOS low-noise amplifier (LNA) with enhanced linearity is proposed, while an active shunt feedback input stage offers input matching, while extended input matching bandwidth is acquired by a
Abstract: A complementary noise-canceling CMOS low-noise amplifier (LNA) with enhanced linearity is proposed. An active shunt feedback input stage offers input matching, while extended input matching bandwidth is acquired by a $\pi$ -type matching network. The intrinsic noise cancellation mechanism maintains acceptable noise figure (NF) with reduced power consumption due to the current reuse principle. Multiple complementary nMOS and pMOS configurations commonly restrain nonlinear components in individual stage of the LNA. Complementary multigated transistor architecture is further employed to nullify the third-order distortion of noise-canceling stage and compensate the second-order nonlinearity of that. High third-order input intercept point (IIP3) is thus obtained, while the second-order input intercept point (IIP2) is guaranteed by differential operation. Implemented in a 0.18- $\mu \text{m}$ CMOS process, the experimental results show that the proposed LNA provides a maximum gain of 17.5 dB and an input 1-dB compression point (IP1 dB) of −3 dBm. An NF of 2.9–3.5 dB and an IIP3 of 10.6–14.3 dBm are obtained from 0.1 to 2 GHz, respectively. The circuit core only draws 9.7 mA from a 2.2 V supply.

95 citations

Journal ArticleDOI
TL;DR: A mixer-first receiver with enhanced selectivity and high dynamic range is proposed, targeting to remove surface acoustic-wave-filters in mobile phones and cover all frequency bands up to 6 GHz, and the circuit principle is explained and RX performance is analyzed.
Abstract: A mixer-first receiver (RX) with enhanced selectivity and high dynamic range is proposed, targeting to remove surface acoustic-wave-filters in mobile phones and cover all frequency bands up to 6 GHz. Capacitive negative feedback across the baseband (BB) amplifier serves as a blocker bypassing path, while an extra capacitive positive feedback path offers further blocker rejection. This combination of feedback paths synthesizes a complex pole pair at the input of the BB amplifier, which is upconverted to the RF port to obtain steeper RF bandpass filter roll-off and reduced distortion. This paper explains the circuit principle and analyzes RX performance. A prototype chip fabricated in 45-nm partially depleted silicon on insulator (SOI) technology achieves high out-of-band linearity (input-referred third-order intercept point (IIP3) = 39 dBm and input-referred second-order intercept point (IIP2) = 88 dB) combined with sub-3-dB noise figure. Desensitization due to a 0-dBm blocker is only 2.2 dB at 1.4 GHz.

81 citations