A 250 MHz 14 dB-NF 73 dB-Gain 82 dB-DR Analog Baseband Chain With Digital-Assisted DC-Offset Calibration for Ultra-Wideband

Shih, Horng-Yuan; Kuo, Chien-Nan; Chen, Wei-Hsien; Yang, Tzong–Jer; Juang, Kai-Chenug

doi:10.1109/jssc.2009.2036320

Cited by 55 publications

(24 citation statements)

References 17 publications

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“…The conventional mixed-signal DCOC circuits detect the output DC offset and trim the IF circuits with DAC [29,30]. Typically, a receiver requires an RF gain of 30 dB and an IF gain of 60 dB or even larger to keep the dynamic range.…”

Section: Dcoc Circuits For Low Power Receivermentioning

confidence: 99%

WBAN Transceiver Design

Wang

Jiang

Chen

2013

CMOS IC Design for Wireless Medical and Health Care

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The tremendous progress in wireless medical and health care applications in recent years, as well as the significant improvements in wireless communication and semiconductor technologies, led to the rapid development in the wireless body area networks (WBAN) technologies [1,2], which can be used to connected the PBS and SIDs in the wireless medical/health care systems as shown in Chap. 2. Frequency Bands for WBAN TransceiversThe IEEE 802.15.6 WBAN standard was released by the IEEE LAN/MAN standards committee for the short-range low-power WBAN operated on, in, or around the human body (but not limited to humans) in February, 2012 [3]. The standard physical (PHY) layer defines a narrow band (NB) mode compliant device (hub/node, corresponding to PBS/SID in the application systems) shall be able to support at least one of the following frequency bands: 402-405, 420-450, 863-870, 902-928, 950-958, 2,360-2,400, and 2,400-2,483.5 MHz. Before the 802.15.6 standard was released, IEEE 802.15.4/ZigBee low-rate wireless personal area network (LR-WPAN) standard was also widely used for WBAN devices [4]. The IEEE 802.15.4 standard PHY layer defines its operation on one of the three possible unlicensed frequency bands: 868, 902-928, and 2,400-2,483.5 MHz [5]. In some occasions, the below VHF band is used for WBAN, including 6.78 MHz, 13.56 MHz, 27.15 MHz, and 9-315 kHz for inductive link.The frequency available for WBAN in 400 MHz UHF, 2.4 GHz ISM and UWB bands for different countries and areas are illustrated in Fig. 4.1 [6].Note that in real applications, only the 400 MHz and 2.4 GHz bands are most commonly used for the wireless medical and health care applications, since the 400 MHz band signal has small through-body transmission loss, and the There are three types of wireless communications in WBAN as mentioned below:1. In the body: SID inside human body, PBS outside body 2. On the body: SID and PBS attached to the body 3. Around the body: SID attached to body, PBS near the body Whether to use the 400 MHz band or the 2.4 GHz band depends on the real application conditions. To satisfy the miniaturization and low energy consumption requirements of the different WBAN applications, in-body and on/around-body SIDs (nodes) usually work on different communication frequencies. High frequency helps to reduce the antenna size, and the on/around-body nodes are usually designed in 2.4 GHz band to make their dimensions acceptable. However, the 2.4 GHz electromagnetic wave shows more propagation attenuation through the body tissue than the 400 MHz wave. In some applications, it is a good choice to choose 400 MHz band for in-body nodes to minimize the power consumption. Thanks to the high relative permittivity of the body tissue, which is about 30~60 in different tissues. The antenna of in-body nodes still can be designed in small dimensions. The comparison of the 400 MHz band and the 2.4 GHz band is shown in Table 4.1. Previously reported wireless transceivers for WBAN PBS (hubs) only focused on the 400 MHz or the 2.4 GHz single band op...

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Section: Dcoc Circuits For Low Power Receivermentioning

confidence: 99%

WBAN Transceiver Design

Wang

Jiang

Chen

2013

CMOS IC Design for Wireless Medical and Health Care

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“…There have been a large number of successful designs using Gm-C circuits in literature [4, 5, 16, 19, 22, 23, 28, and 30]. Gm-C filters for emerging UWB systems of much higher frequencies have also been proposed [31][32][33]39].…”

Section: Gm-c Filtersmentioning

confidence: 99%

“…The RC section provides a useful degree of prefiltering to reduce the level of out-of-band interferers reaching the active sections of the filter. Similarly, [33] uses a 2 nd -order current-mode active-RC Sallen-Key filter in cascade with a 6 th -order Gm-C filter, with the former for effective rejection of out-of-band interferers and the later for channel selection. A combination of two 2 nd -order active-Gm-RC filters and one 2 nd -order active-RC filter is implemented in [17].…”

Section: Gm-c Filtersmentioning

confidence: 99%

“…The choice of them depends on the filter selectivity/order, design/circuit complexity, and power/chip size. In the literature, Butterworth [2, 5-7, 17, 20, 23, 25, 28, 38, 41], Chebyshev [3,4,19,25,26,32,33,36], and elliptic [4,22,24,25,27,36,37,40] approximations all have been popularly used for baseband channel filters with the Butterworth type used more often due to the ease of design and simplicity in structure. Reference [3] also designs an inverse Chebyshev filter.…”

Section: Structures For High-order Analogue Baseband Filtersmentioning

confidence: 99%

“…Also, less complex lower-order filters can provide ease of design, have less noise and reduced parasitic effects. The order of filters adopted in the literature ranges from 3 rd [3,5,6,20,28,36] [4,7,33] order, with most using the 5 th -order to best trade off frequency response and circuit complexity. For multistandard receivers, references [3, 6, 20, and 36] have also presented an order-adaptable filter system which can realize 3 rd -and 5 th -order filters for different standards to reduce chip area and power consumption.…”

Section: Structures For High-order Analogue Baseband Filtersmentioning

confidence: 99%

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Multistandard Analogue Baseband Filters for Software-Defined and Cognitive Radio Receivers

Sun

Moritz

Zhu

2011

Circuits Syst Signal Process

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Analogue baseband filters are an important circuit for channel select and anti-aliasing in wireless and mobile communication systems. For software and cognitive radio, they must be widely tunable and reconfigurable to accommodate existing, emerging, and future wireless and mobile standards. In this paper, design considerations of tunable and programmable filters for highly integrated multistandard receivers are presented. General background of multistandard integrated receivers and design challenges of analogue baseband filters are given. Circuit techniques for baseband filter design including the widely used active-RC and Gm-C circuits are described. Filter structures and design methods for high-order baseband filters are reviewed. On-chip tuning issues and methods are discussed. Results and performances of some published design examples are summarized. Future directions are also pointed out.

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A 5‐Gbps USB3.0 transmitter and receiver linear equalizer

Terzopoulos¹,

Laoudias²,

Plessas³

et al. 2014

Circuit Theory & Apps

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SummaryA USB3.0 compatible transmitter and the linear equalizer of the corresponding receiver are presented in this paper. The architecture and circuit design techniques used to meet the strict requirements of the overall link design are explored. Output voltage amplitude and de‐emphasis levels are programmable, whereas the output impedance is calibrated to 50Ω. A programmable receiver equalizer is also presented with its main purpose being to compensate for the channel losses; this is employed together with a DC offset compensation scheme. The 6.25‐GHz equalizer provides a 10 dB overall gain equalization and 5.5‐dB peaking at the maximum gain setting. Designed using a mature and well established 65 nm complementary metal oxide semiconductor process, the layout area is 400 µm × 210 µm for the transmitter core, and 140 µm × 70 µm for the equalizer core. The power consumption is 55 and 4 mW, respectively, from a 1.2 V supply at a data rate of 5 Gbps. The target application for such high‐speed blocks is to implement the critical part of the physical layer that defines the signaling technology of SuperSpeed USB3 PHY. However, identical iterations of the circuitry discussed can be used for similar high‐speed applications like the PCI express (PCIe). Copyright © 2014 John Wiley & Sons, Ltd.

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A 250 MHz 14 dB-NF 73 dB-Gain 82 dB-DR Analog Baseband Chain With Digital-Assisted DC-Offset Calibration for Ultra-Wideband

Cited by 55 publications

References 17 publications

WBAN Transceiver Design

WBAN Transceiver Design

Multistandard Analogue Baseband Filters for Software-Defined and Cognitive Radio Receivers

A 5‐Gbps USB3.0 transmitter and receiver linear equalizer

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