Design of Class-E$_{\rm M}$ Oscillator With Second Harmonic Injection

Miyahara, Ryosuke; Wei, Xiuqin; Nagashima, Tadamichi; Kousaka, Takuji; Sekiya, Hiroo

doi:10.1109/tcsi.2012.2188936

Cited by 10 publications

(2 citation statements)

References 27 publications

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“…Numerical design methods can provide the design parameters even if the design circuit is complicated to analyze. Therefore, designs of many types of the class-E switching circuits, which had been considered impossible to design due to complexity, were succeeded [5], [7]- [9], [18]- [20], [22].…”

Section: B Numerical Design Approachesmentioning

confidence: 99%

Comprehensive and Simplified Numerical Design Procedure for Class-E Switching Circuits

Zhu¹,

Komiyama

Nguyen

et al. 2021

IEEE Access

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This paper proposes comprehensive and simplified numerical design procedures for the class-E switching circuits with the Particle Swarm Optimization (PSO) algorithm. The PSO algorithm does not require approximate solutions and partial differentiation derivations. Therefore, the proposed design method has higher convergence stability than Newton's method-based design. It is also a feature that the PSO algorithm allows the mismatch between the design condition and the design parameter numbers. As a design example, we successfully draw the multiple design curves of the class-E amplifier and frequency multipliers by one-time optimization execution with the modified PSO algorithm. Besides, we show a pretty simple design procedure of the class-E amplifier, which uses only one evaluation function for determining three design parameters. The design accuracy of the proposed design method does not deteriorate compared with the previous design method. We carried out circuit experiments, which achieved power-conversion efficiency of 94.0%. The circuit experiment showed agreement with numerical predictions, which confirmed the validity and usefulness of the proposed design method.

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Section: B Numerical Design Approachesmentioning

confidence: 99%

Comprehensive and Simplified Numerical Design Procedure for Class-E Switching Circuits

Zhu¹,

Komiyama

Nguyen

et al. 2021

IEEE Access

Self Cite

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“…Here, to increase the input power of the injection transistors, the transformer based balun is connected in between the input pads and the transistors, realizing the purpose of impedance matching. To generate a large harmonic current, the injection transistors work in the class-B mode [9,21,22,23], and the neutralization capacitor CN is specially added to enhance its gain performance [24,25]. To improve the ILFT working efficiency, a 3 rd harmonic LC tail filter is connected at the injection transistor source terminal [19,26,27,28,29,30].…”

Section: Circuit Design and Analysismentioning

confidence: 99%

A 31.5-to-40.5 GHz injection-locked CMOS frequency tripler with injection-current enhancement technique

Wang

et al. 2020

IEICE Electron. Express

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This letter presents an injection-locked 36 GHz frequency tripler (ILFT) for 5G applications. With the high order transformer based LC tank, over the target operating frequency range its phase response is flat at around 0 degree, and the injection-current is enhanced with a 3 rd harmonic LC tail filter, thereby achieving a wide locking range. Fabricated in a 65nm CMOS process, the ILFT consumes about 7.2 mW from a 0.6 V supply, and its core area without the output buffer and input matching network is only 0.25×0.4 mm 2 . With 0 dBm input injection power, the proposed ILFT achieves a locking range from 31.5 to 40.5 GHz (25%).

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