Design of High-Gain Sub-THz Regenerative Amplifiers Based on Double-<i>G</i>
                  <sub>max</sub> Gain Boosting Technique

Park, Dae‐Woong; Utomo, Dzuhri Radityo; Yun, Byeonghun; Mahmood, Hafiz Usman; Hong, Jong-Phil; Lee, Sang‐Gug

doi:10.1109/jssc.2021.3092168

Cited by 16 publications

(4 citation statements)

References 29 publications

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“…This leaves little or no room to realize matching networks aiming to widen the amplifier's bandwidth on high side of the passband all the way to the upper corner frequency f H , where G max is dropping from its value at f c . Recently, a few silicon-based THz amplifiers have been reported [16], [81], [82]. Great efforts have been made to improve the power gain of a THz amplifier, introducing all kinds of "embedding network" to the core device, as exemplified in generic block diagram representation in Fig.…”

Section: Core Building Blocks For Thz Transceivers a Thz Amplifier De...mentioning

confidence: 99%

Terahertz Integrated Circuits and Systems for High-Speed Wireless Communications: Challenges and Design Perspectives

Heydari

2021

IEEE Open J. Solid-State Circuits Soc.

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This paper presents challenges and design perspectives for terahertz (THz) integrated circuits and systems. THz means different things to different people. From International Telecommunication Union (ITU) perspective, THz radiation primarily means frequency range from 300 − 3000 GHz. However, recently, a more expansive definition of THz has emerged that covers frequencies from 100 GHz to 10 THz, which includes sub-THz (100 − 300 GHz), ITU-defined THz frequencies. This definition is now commonly used by communication theorists, and since this paper is intended for people with a wide variety of expertise in system and circuit design, we have adopted the latter definition. The paper brings to the open unmitigated shortcomings of conventional transceiver architectures for multi gigabit-per-second wireless applications, unfolds challenges in designing THz transceivers, and provides pathways to address these impediments. Furthermore, it goes through design challenges and candidate solutions for key circuit blocks of a transceiver including front-end amplifiers, local oscillator (LO) circuit and LO distribution network, and antennas intended for frequencies above 100 GHz.

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Section: Core Building Blocks For Thz Transceivers a Thz Amplifier De...mentioning

confidence: 99%

Terahertz Integrated Circuits and Systems for High-Speed Wireless Communications: Challenges and Design Perspectives

Heydari

2021

IEEE Open J. Solid-State Circuits Soc.

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“…To improve the power gain of the amplifier, great efforts have been dedicated to incorporate various embedding network to the active device. By judiciously adopting Y/Zembedding [6], Y/PreZ-embedding [7] and Z/PreY-embedding [8] network, the maximum available gain (Gma) of an active two-port network (A2P) can be improved, until G ma gets to it upper limit which is G ma_upper_limit = [9],…”

Section: Introductionmentioning

confidence: 99%

A 194 GHz Three-Stage Differential Driver Amplifier Utilizing a Three-Element Embedded Core at Near-fmax Frequencies in 65 nm CMOS

He,

Xie,

Wang

2024

Preprint

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In this letter, we introduce a 194 GHz threestage differential driver amplifier operating at near-fmax frequencies. To address practical considerations associated with implementing on-chip embedding elements within the sub-THz frequency range, we employ a three-element embedded core consisting of three types of embedding networks. This design approach offers greater flexibility in selecting the required embedding elements. Based on the proposed embedded core, a three-stage drive amplifier is implemented in 65 nm CMOS process. The measurement results indicate that the proposed amplifier exhibits a smallsignal gain of 20.4 dB, a Psat of -2.1 dBm, and a peak PAE of 2.2% at 194 GHz.

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“…One of the most useful methods of boosting power gain is to construct feedback networks [9][10][11][12][13][14][15][16][17][18][19][20][21]. As shown in Figure 1, the power gain of a two-port network can achieve the maximum achievable gain G max by embedding feedback networks.…”

Section: Introductionmentioning

confidence: 99%

“…The G max is the peak value of G ma ; we can obtain the amplifier with a gain of G ma or G max via input and output conjugate matching [12]. The work in [18] achieves G max by boosting gain, but the saturation power is only 0.09 dBm at 247 GHz and −2.36 dBm at 272 GHz. A lossy capacitive over-neutralization technique was proposed to increase U for an amplifier with 14.3 dB of gain and only 1.5 dBm of saturation power [19].…”

Section: Introductionmentioning

confidence: 99%

A 110 GHz Feedback Amplifier Design Based on Quasi-Linear Analysis

Dong,

Song,

Xing

2023

Electronics

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The power gain and output power of millimeter-wave (mm-Wave) and terahertz (THz) amplifiers are critical performance metrics, particularly when the operating frequencies of amplifiers are near to the maximum oscillator frequency (fmax) of the transistor. This paper presents the design of a 110 GHz amplifier based on the quasi-linear method. The power gain can be boosted to maximum achievable gain (Gmax) using a linear, lossless, reciprocal feedback network, though this leads to a simultaneous decrease in output power. Based on quasi-linear analysis, for an amplifier with Gmax gain, when the K-factor is equal to 1, the output power is zero. To avoid the very low output power of amplifiers, a new approach is proposed to balance power gain and output power. A 110 GHz six-stage feedback amplifier was designed using the proposed approach and fabricated using 40 nm CMOS technology. The measured power gain is 26.5 dB, and the saturation output power is 13 dBm at 110 GHz.

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Design of High-Gain Sub-THz Regenerative Amplifiers Based on Double-G _max Gain Boosting Technique

Cited by 16 publications

References 29 publications

Terahertz Integrated Circuits and Systems for High-Speed Wireless Communications: Challenges and Design Perspectives

Terahertz Integrated Circuits and Systems for High-Speed Wireless Communications: Challenges and Design Perspectives

A 194 GHz Three-Stage Differential Driver Amplifier Utilizing a Three-Element Embedded Core at Near-fmax Frequencies in 65 nm CMOS

A 110 GHz Feedback Amplifier Design Based on Quasi-Linear Analysis

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Design of High-Gain Sub-THz Regenerative Amplifiers Based on Double-G max Gain Boosting Technique

Cited by 16 publications

References 29 publications

Terahertz Integrated Circuits and Systems for High-Speed Wireless Communications: Challenges and Design Perspectives

Terahertz Integrated Circuits and Systems for High-Speed Wireless Communications: Challenges and Design Perspectives

A 194 GHz Three-Stage Differential Driver Amplifier Utilizing a Three-Element Embedded Core at Near-fmax Frequencies in 65 nm CMOS

A 110 GHz Feedback Amplifier Design Based on Quasi-Linear Analysis

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Design of High-Gain Sub-THz Regenerative Amplifiers Based on Double-G _max Gain Boosting Technique