A 400-mV 2.4-GHz frequency-shift keying transmitter using a capacitor switch across a transformer for a wide tuning range voltage-controlled oscillator

Yasunori Miyahara, Keisuke Ishikawa, Tadahiro Kuroda

研究成果: Article

1 被引用数 (Scopus)

抄録

We use a simple directly modulated closed loop to develop a 2.1-mW, 2.4-GHz frequency-shift keying (FSK) transmitter that operates on 400-mV DC supply. Connecting a capacitor bank switch via a transformer in the voltage control oscillator (VCO) to the frequency-divider circuit expands the frequency tuning range without reducing VCO performance. A prototype was fabricated using the 65-nm standard CMOS process with a chip size of 1.65 × 1.85mm2. A modulation output signal spectrum of %42 dBc at 1.5MHz with %6dBm at the PA buffer output terminal; moreover, a VCO phase noise of %101 dBc/Hz at 1MHz is achieved. The FSK transmitter can readily use voltages supplied by harvested energy because of the low power consumption of the sensor network.

本文言語English
論文番号04CF04
ジャーナルJapanese journal of applied physics
56
4
DOI
出版ステータスPublished - 2017 4
外部発表はい

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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