共查询到20条相似文献,搜索用时 515 毫秒
1.
2.
《Microwave and Wireless Components Letters, IEEE》2009,19(11):737-739
3.
Yang Lu Kiat Seng Yeo Cabuk A. Jianguo Ma Manh Anh Do Zhenghao Lu 《IEEE transactions on circuits and systems. I, Regular papers》2006,53(8):1683-1692
An ultra-wideband (UWB) 3.1- to 10.6-GHz low-noise amplifier (LNA) employing a common-gate stage for wideband input matching is presented in this paper. Designed in a commercial 0.18-/spl mu/m 1.8-V standard RFCMOS technology, the proposed UWB LNA achieves fully on-chip circuit implementation, contributing to the realization of a single-chip CMOS UWB receiver. The proposed UWB LNA achieves 16.7/spl plusmn/0.8 dB power gain with a good input match (S11<-9 dB) over the 7500-MHz bandwidth (from 3.1 GHz to 10.6 GHz), and an average noise figure of 4.0 dB, while drawing 18.4-mA dc biasing current from the 1.8-V power supply. A gain control mechanism is also introduced for the first time in the proposed design by varying the biasing current of the gain stage without influencing the other figures of merit of the circuit so as to accommodate the UWB LNA in various UWB wireless transmission systems with different link budgets. 相似文献
4.
Li C.-M. Li M.-T. He K.-C. Tarng J.-H. 《Microwave and Wireless Components Letters, IEEE》2010,20(2):100-102
5.
Chang-Wan Kim Min-Suk Kang Phan Tuan Anh Hoon-Tae Kim Sang-Gug Lee 《Solid-State Circuits, IEEE Journal of》2005,40(2):544-547
An ultra-wideband (UWB) CMOS low noise amplifier (LNA) topology that combines a narrowband LNA with a resistive shunt-feedback is proposed. The resistive shunt-feedback provides wideband input matching with small noise figure (NF) degradation by reducing the Q-factor of the narrowband LNA input and flattens the passband gain. The proposed UWB amplifier is implemented in 0.18-/spl mu/m CMOS technology for a 3.1-5-GHz UWB system. Measurements show a -3-dB gain bandwidth of 2-4.6GHz, a minimum NF of 2.3 dB, a power gain of 9.8 dB, better than -9 dB of input matching, and an input IP3 of -7dBm, while consuming only 12.6 mW of power. 相似文献
6.
《Solid-State Circuits, IEEE Journal of》2006,41(8):1784-1791
This paper presents a direct-conversion receiver for FCC-compliant ultra-wideband (UWB) Gaussian-shaped pulses that are transmitted in one of fourteen 500-MHz-wide channels within the 3.1–10.6-GHz band. The receiver is fabricated in 0.18-$mu$ m SiGe BiCMOS. The packaged chip consists of an unmatched wideband low-noise amplifier (LNA), filter, phase-splitter, 5-GHz ISM band switchable notch filter, 3.1–10.6-GHz local oscillator (LO) amplifiers, mixers, and baseband channel-select filters/buffers. The required quadrature single-ended LO signals are generated externally. The average conversion gain and input$P_1 dB$ are 32 dB and$-$ 41 dBm, respectively. The unmatched LNA provides a system noise figure of 3.3 to 5 dB over the entire band. The chip draws 30 mA from 1.8 V. To verify the unmatched LNA's performance in a complete system, wireless testing of the front-end embedded in a full receiver at 100 Mbps reveals a$10^-3$ bit-error rate (BER) at$-$ 80 dBm sensitivity. The notch filter suppresses out-of-band interferers and reduces the effects of intermodulation products that appear in the baseband. BER improvements of an order of magnitude and greater are demonstrated with the filter. 相似文献
7.
《IEEE transactions on circuits and systems. I, Regular papers》2009,56(5):933-942
8.
低噪声放大器是超宽带接收机系统中最重要的模块之一,设计了一种可应用于3.1~5.2GHz频段超宽带可变增益低噪声放大器。电路输入级采用共栅结构实现超宽带输入匹配,并引入电流舵结构实现了放大器的可变增益。仿真基于TSMC 0.18μm RF CMOS工艺。结果表明,在全频段电路的最大功率增益为10.5dB,增益平坦度小于0.5dB,噪声系数小于5dB,输入反射系数低于-15dB,在1.8V电源电压下,功耗为9mW。因此,该电路能够在低功耗超宽带射频接收机系统中应用。 相似文献
9.
在分析各种超宽带(UWB)接收机系统结构的基础上,提出了一种低功耗IR-UWB接收机结构.该结构基于非相干通信机制,使用自混频技术和脉冲宽度调制方式(PPM).在该结构中,低噪声放大器(LNA)的低功耗优化是系统低功耗实现的关键.综合分析各种宽带LNA结构,提出了一种低功耗LNA设计.该LNA采用65 nmCMOS标准... 相似文献
10.
Chen A. Y.-K. Baeyens Y. Chen Y.-K. Lin J. 《Microwave and Wireless Components Letters, IEEE》2010,20(2):103-105
11.
Jaemin Shim 《International Journal of Electronics》2013,100(10):1609-1620
This paper presents the design of a 2.5/3.5-GHz dual-band low-power and low-noise CMOS amplifier (LNA), which uses the capacitor cross-coupling technique and current-reuse method with four switches. The proposed LNA uses a single RF block and a broadband input stage, which is a key aspect for the easy reconfiguration of a dual-band LNA. Switching at the inter-stage and output allows for the selection of a different standard. The dual-band LNA attenuates the undesired interference of a broadband gain response circuit, which allows the linearity of the amplifier to be improved. The capacitor cross-coupled gm-boosting method improves the NF and reduces the current consumption. The proposed LNA employs a current-reused structure to decrease the total power consumption. The inter-stage and output switched resonators switch the LNA between the 2.5-GHz and 3.5-GHz bands. The proposed dual-band LNA optimises power consumption by the securing gain, noise figure and linearity. The simulated performance reveals gains of 16.7 dB and 19.6 dB, and noise figures of 3.04 dB and 2.63 dB at the two frequency bands, respectively. The linearity parameters of IIP3 are ?5.7 dBm at 2.5 GHz and ?9.7 dBm at 3.5 GHz. The proposed dual-band LNA consumes 5.6 mW from a 1.8 V power supply. 相似文献
12.
A fully integrated differential CMOS LNA for 3-5-GHz ultrawideband wireless receivers 总被引:1,自引:0,他引:1
Bevilacqua A. Sandner C. Gerosa A. Neviani A. 《Microwave and Wireless Components Letters, IEEE》2006,16(3):134-136
A fully integrated differential low-power low-noise amplifier (LNA) for ultrawideband (UWB) systems operating in the 3-5-GHz frequency range is presented. A two-section LC ladder input network is exploited to achieve excellent input match in a wideband fashion and to optimize the noise performance. Prototypes fabricated in a digital 0.13-/spl mu/m complementary metal oxide semiconductor technology show the following performance: 9.5-dB peak power gain, 3.5-dB minimum noise figure, -6-dBm input-referred 1-dB compression point, and -0.8-dBm input-referred third-order intercept point, while drawing 11mA from a 1.5-V supply. The realized LNA is compared with previously reported LNAs tailored for the same frequency range. 相似文献
13.
《Microwave Theory and Techniques》2009,57(8):1895-1902
14.
《Microwave and Wireless Components Letters, IEEE》2009,19(5):323-325
15.
《Microwave and Wireless Components Letters, IEEE》2009,19(3):176-178
16.
《Microwave Theory and Techniques》2008,56(8):1807-1816
17.
《Circuits and Systems II: Express Briefs, IEEE Transactions on》2008,55(8):713-717
18.
Zheng Renliang Jiang Xudong Yao Wang Yang Guang Yin Jiangwei Zheng Jianqin Ren Junyan Li Wei Li Ning 《半导体学报》2010,31(6)
A monolithic RF transceiver for an MB-OFDM UWB system in 3.1-4.8 GHz is presented.The transceiver adopts direct-conversion architecture and integrates all building blocks including a gain controllable wideband LNA,a I/Q merged quadrature mixer,a fifth-order Gm-C bi-quad Chebyshev LPF/VGA,a fast-settling frequency synthesizer with a poly-phase filter,a linear broadband up-conversion quadrature modulator,an active D2S converter and a variablegain power amplifier.The ESD protected transceiver is fabricated in Jazz Semiconductor's 0.18-μm RF CMOS with an area of 6.1 mm2 and draws a total current of 221 mA from 1.8-V supply.The receiver achieves a maximum voltage gain of 68 dB with a control range of 42 dB in 6 dB/Step,noise figures of 5.5-8.8 dB for three sub-bands,and an inband/out-band IIP3 better than-4 dBm/+9 dBm.The transmitter achieves an output power ranging from-10.7 to-3dBm with gain control,an output P1dB better than-7.7 dBm,a sideband rejection about 32.4 dBc,and LO suppression of 31.1 dBc.The hopping time among sub-bands is less than 2.05 ns. 相似文献
19.
《Solid-State Circuits, IEEE Journal of》2006,41(8):1764-1771
This paper addresses the problem of 5–6-GHz WLAN interferer rejection in a direct-conversion receiver front-end for multi-band orthogonal frequency division multiplexing (OFDM) ultra-wideband (UWB) applications. The IC, realized in a 0.18-$muhbox m$ CMOS technology, comprises a single-ended voltage–voltage feedback low-noise amplifier (LNA) and a quadrature mixer. The LNA employs a double-peak single-notch network in the output load, amplifying UWB groups #1 and #3, while rejecting WLAN interferes in the 5–6-GHz frequency range. The mixer, based on a merged quadrature topology, also realizes a second-order low-pass filtering. Fabricated dies have been bonded on PCB for characterization. The front-end, drawing 10 mA from 1.8 V, achieves a 1-dB gain desensitization with a$-$ 6.5-dBm interferer power at 5.5 GHz. Other measured performances are 5.2-dB and 7.7-dB minimum and maximum noise figure (NF),$-$ 3.5-dBm minimum IIP3 and$+$ 34.5-dBm minimum in-band IIP2 and$+$ 21-dBm out-of-band IIP2. 相似文献
20.
In this work, we present a self cascode based ultra-wide band (UWB) low noise amplifier (LNA) with improved bandwidth and gain for 3.1–10.6 GHz wireless applications. The self cascode (SC) or split-length compensation technique is employed to improve the bandwidth and gain of the proposed LNA. The improvement in the bandwidth of SC based structure is around 1.22 GHz as compared to simple one. The significant enhancement in the characteristics of the introduced circuit is found without extra passive components. The SC based CS–CG structure in the proposed LNA uses the same DC current for operating first stage transistors. In the designed UWB LNA, a common source (CS) stage is used in the second stage to enhance the overall gain in the high frequency regime. With a standard 90 nm CMOS technology, the presented UWB LNA results in a gain \(\hbox {S}_{21}\) of \(20.10 \pm 1.65\,\hbox {dB}\) across the 3.1–10.6 GHz frequency range, and dissipating 11.52 mW power from a 1 V supply voltage. However, input reflection, \(\hbox {S}_{11}\), lies below \(-\,10\) dB from 4.9–9.1 GHz frequency. Moreover, the output reflection (\(\hbox {S}_{22}\)) and reverse isolation (\(\hbox {S}_{12}\)), is below \(-\,10\) and \(-\,48\) dB, respectively for the ultra-wide band region. Apart from this, the minimum noise figure (\(\hbox {NF}_{min}\)) value of the proposed UWB LNA exists in the range of 2.1–3 dB for 3.1–10.6 GHz frequency range with a a small variation of \(\pm \,0.45\,\hbox {dB}\) in its \(\hbox {NF}_{min}\) characteristics. Linearity of the designed LNA is analysed in terms of third order input intercept point (IIP3) whose value is \(-\,4.22\) dBm, when a two tone signal is applied at 6 GHz with a spacing of 10 MHz. The other important benefits of the proposed circuit are its group-delay variation and gain variation of \(\pm \,115\,\hbox {ps}\) and \(\pm \,1.65\,\hbox {dB}\), respectively. 相似文献