K. Wada

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Design methodologies of planar duplexer and triplexer consisting of bandpass filters (BPFs) using different tapped resonators are described. Firstly, we propose a planar duplexer consisting of BPFs using a tapped half-wavelength resonator and a tapped quarter-wavelength resonator. The duplexer is designed based on a classical filter design method with a(More)
An active cancellation circuit using two detection bands for large digital circuit is proposed. A variation of an optimum transconductance of cancellation amplifier for a noise source position on the proposed circuit becomes smaller than that on the conventional circuit. Noise reduction effects of the new version of active cancellation circuits are(More)
This paper experimentally and numerically studies the effect of a high-frequency acoustic pulse on brightening single-bubble sonoluminescence (SBSL). A polyvinylidene fluoride point-focusing transducer was driven by a 700-W pulse generator to superimpose the acoustic pulse on the sonoluminescing bubble. The center frequency of the pulse was 10 MHz and the(More)
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