A HSPA&amp;#x002B;/WCDMA/EDGE 40nm Modem SoC with embedded RF transceiver supporting RX diversity

Strange, Jon; Chang, Hsiu-Ju; Müller, Paul; Ali-Ahmad, W.Y.; Beghein, Christophe; Abdeljelil, F. Ben; Lee, Wen-Chang; Chiu, Chaochang; Sin, T. Y.; Lin, Ta-Hsin; Ivory, David; Shih, Hao-Tang; Beale, Chris; Nalbantis, D.; Lu, Ivan Siu-Chuang; Fan, Chi-Wei; Lin, Shao-Hung; Chen, Hsin-Hua; Sun, Chih-Hao; Lai, Li-Shin; Chen, Jhy-Rong; Huang, Sheng-Jui

doi:10.1109/rfic.2014.6851678

Cited by 5 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wire bondings of the adjacent critical pads can also magnetically couple. One solution to solve the magnetic coupling is to employ eight-shape inductors [17]. As reported in [18], 30 dB of magnetic coupling reduction could be achieved.…”

Section: Injection-pulling Mitigation Methodsmentioning

confidence: 99%

Toward Solving Multichannel RF-SoC Integration Issues Through Digital Fractional Division

Mehr

Tohidian

Staszewski

2016

IEEE Trans. VLSI Syst.

View full text Add to dashboard Cite

In modern RF system on chips (SoCs), the digital content consumes up to 85% of the IC chip area. The recent push to integrate multiple RF-SoC cores is met with heavy resistance by the remaining RF/analog circuitry, which creates numerous strong aggressors and weak victims leading to RF performance degradation. A key such mechanism is injection pulling through parasitic coupling between various LC-tank oscillators as well as between them and strong transmitter (TX) outputs. Any static or dynamic frequency proximity between aggressors (i.e., oscillators and TX outputs) and victims (i.e., oscillators) that share the same die causes injection pulling, which produces unwanted spurs and/or modulation distortion. In this paper, we propose and demonstrate a new frequency planning technique of a multicore TX where each LC-tank oscillator is separated from other aggressors beyond its pulling range. This is done by breaking the integer harmonic frequency relationship of victims/aggressors within and between the RF transmission channels using digital fractional divider based on a phase rotation. Each oscillator's center frequency can be fractionally separated by ∼28% but, at the same time, both producing closely spaced frequencies at the phase rotator outputs. The injection-pulling spurs are so far away that they are insignificantly small (−80 dBc) and coincide with the second harmonic of the carrier. This method is experimentally verified in a two-channel system in 65-nm digital CMOS, each channel comprising a high-swing class-C oscillator, frequency divider, and phase rotator.

show abstract

Section: Injection-pulling Mitigation Methodsmentioning

confidence: 99%

Toward Solving Multichannel RF-SoC Integration Issues Through Digital Fractional Division

Mehr

Tohidian

Staszewski

2016

IEEE Trans. VLSI Syst.

View full text Add to dashboard Cite

show abstract

RFIC Complexity a Challenge for Academia and Industry

Heinen

Henkel

2018

2018 IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA)

View full text Add to dashboard Cite

9.1 A 13mm<sup>2</sup> 40nm multiband GSM/EDGE/HSPA+/TDSCDMA/LTE transceiver

Georgantas¹,

Vavelidis²,

Haralabidis³

et al. 2015

2015 IEEE International Solid-State Circuits Conference - (ISSCC) Digest of Technical Papers

View full text Add to dashboard Cite

A HSPA+/WCDMA/EDGE 40nm Modem SoC with embedded RF transceiver supporting RX diversity

Cited by 5 publications

References 0 publications

Toward Solving Multichannel RF-SoC Integration Issues Through Digital Fractional Division

Toward Solving Multichannel RF-SoC Integration Issues Through Digital Fractional Division

RFIC Complexity a Challenge for Academia and Industry

9.1 A 13mm<sup>2</sup> 40nm multiband GSM/EDGE/HSPA+/TDSCDMA/LTE transceiver

Contact Info

Product

Resources

About

A HSPA&#x002B;/WCDMA/EDGE 40nm Modem SoC with embedded RF transceiver supporting RX diversity

Cited by 5 publications

References 0 publications

Toward Solving Multichannel RF-SoC Integration Issues Through Digital Fractional Division

Toward Solving Multichannel RF-SoC Integration Issues Through Digital Fractional Division

RFIC Complexity a Challenge for Academia and Industry

9.1 A 13mm<sup>2</sup> 40nm multiband GSM/EDGE/HSPA&#x002B;/TDSCDMA/LTE transceiver

Contact Info

Product

Resources

About

A HSPA+/WCDMA/EDGE 40nm Modem SoC with embedded RF transceiver supporting RX diversity

9.1 A 13mm<sup>2</sup> 40nm multiband GSM/EDGE/HSPA+/TDSCDMA/LTE transceiver