Analysis and Design of a 1.6–28-GHz Compact Wideband LNA in 90-nm CMOS Using a $ \pi $-Match Input Network

Chen, Hsien‐Ku; Lin, Yo‐Sheng; Lu, Shey‐Shi

doi:10.1109/tmtt.2010.2052406

Cited by 117 publications

(59 citation statements)

References 22 publications

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“…1 with notch filter enclosed in the line box. By using resistive feedback and input π network [6,7], wideband LNA is designed. The input 50 Ω is formed by the resistive feedback.…”

Section: Proposed Notch Filter Designmentioning

confidence: 99%

A high image rejection SiGe low noise amplifier using passive notch filter

Jing

Zhang

2014

IEICE Electron. Express

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A new design is presented that combines a low-noise amplifier (LNA) with a new passive base-collector notch filter based on Jazz 0.18 μm SiGe technology. Extra capacitor is introduced in notch filter, eliminating the operating-frequency input mismatch in formal base-collector notch filters. Results show that LNA obtains a 4 dB S 21 enhancement of 14.1 dB and a 7 dB increase S 11 of À15 dB at 20.5 GHz, image rejection ratio is 33.5 dB. IIP3 is 3.43 dBm at the operating frequency for a power consumption of 18 mW from a 3 V power supply.

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“…1 with notch filter enclosed in the line box. By using resistive feedback and input π network [6,7], wideband LNA is designed. The input 50 Ω is formed by the resistive feedback.…”

Section: Proposed Notch Filter Designmentioning

confidence: 99%

A high image rejection SiGe low noise amplifier using passive notch filter

Jing

Zhang

2014

IEICE Electron. Express

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“…The input impedance of this proposed circuit is calculated without difficulty, as derived in (1), where C L represents the total load capacitance of the following stage and C gs refers to the external capacitance C g plus the inherent parasitic capacitance C' gs . This input impedance should be equal to the characteristic impedance (Z 0 ) for ideal matching, as expressed in (3). Taking the real and imaginary parts of (2) separately, two equations can be derived, as expressed in (3) and (4).…”

Section: Design Philosophymentioning

confidence: 99%

“…The design approaches for wideband LNAs can be categorized into many methods. Resistive feedback amplifiers [1][2][3][4] create a wideband input impedance match, but gain decreases at high frequencies. Capacitive feedback or active feedback can be utilized to compensate for the gain decrease in resistive feedback amplifiers [5,6].…”

Section: Introductionmentioning

confidence: 99%

Highly Linear Wideband LNA Design Using Inductive Shunt Feedback

Jeong¹,

Cho

Min³

2014

JSTS:Journal of Semiconductor Technology and Science

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Abstract-Low noise amplifier (LNA) is an integral component of RF receiver and frequently required to operate at wide frequency bands for various wireless system applications. For wideband operation, important performance metrics such as voltage gain, return loss, noise figure and linearity have been carefully investigated and characterized for the proposed LNA. An inductive shunt feedback configuration is successfully employed in the input stage of the proposed LNA which incorporates cascaded networks with a peaking inductor in the buffer stage. Design equations for obtaining low and high impedance-matching frequencies are easily derived, leading to a relatively simple method for circuit implementation. Careful theoretical analysis explains that input impedance can be described in the form of second-order frequency response, where poles and zeros are characterized and utilized for realizing the wideband response. Linearity is significantly improved because the inductor located between the gate and the drain decreases the third-order harmonics at the output. Fabricated in 0.18 µm CMOS process, the chip area of this wideband LNA is 0.202 mm 2 , including pads. Measurement results illustrate that the input return loss shows less than -7 dB, voltage gain greater than 8 dB, and a little high noise figure around 6-8 dB over 1.5 -13 GHz. In addition, good linearity (IIP3) of 2.5 dBm is achieved at 8 GHz and 14 mA of current is consumed from a 1.8 V supply.

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“…Good input matching is very difficult to realize in the higher frequency range. To alleviate this problem, a series input inductor L G is added in the gate of the transistor M1 [6]. The input resistance Z in will be:…”

Section: Conventional Lna Topologiesmentioning

confidence: 99%

“…Since R l1 and R l2 are much smaller than Rs,R l1 =R s and R l2 =R s 1 þ g m R L ð Þ will be much smaller than one and can be neglected. For the third term F f , which is the noise factor coming from the feedback resistor, it can be expressed by [6] …”

Section: Noise Figurementioning

confidence: 99%

A low noise figure 2-GHz bandwidth LNA using resistive feedback with additional input inductors

Zhang

Dinh

Chen

et al. 2013

IEICE Electron. Express

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In this paper, an input inductive network for the wideband LNA is proposed. The two input inductors located in and out of the feedback loop are set respectively to combine with the conventional resistive feedback structure. Input matching and NF of the LNA can be optimized separately by varying the value of the two input inductors without significant influence from one to the other. The proposed cascode LNA was analyzed, designed, and fabricated in the IBM 0.13 μm CMOS technology to verify the concept. A À10 dB S11 is achieved in a wide range of frequency from 1 GHz to 3 GHz. Within this bandwidth, the LNA has a gain of 7.5 dB and a minimum noise figure of 2.5 dB while consumes a 7 mW of power. The results indicate that the proposed input-network effectively alleviates the tradeoff between noise figure and bandwidth without requiring extra power consumption.

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Analysis and Design of a 1.6–28-GHz Compact Wideband LNA in 90-nm CMOS Using a $ \pi $-Match Input Network

Cited by 117 publications

References 22 publications

A high image rejection SiGe low noise amplifier using passive notch filter

A high image rejection SiGe low noise amplifier using passive notch filter

Highly Linear Wideband LNA Design Using Inductive Shunt Feedback

A low noise figure 2-GHz bandwidth LNA using resistive feedback with additional input inductors

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