| 講演抄録／キーワード |
| 講演名 |
A ΔΣ-Modulator-Less DCO using Fractional Capacitors for Cellular Transmitter
○Takahiro Nakamura・Takayasu Norimatsu・Taizo Yamawaki（Hitachi） エレソ技報アーカイブはこちら |
| 抄録 |
（和） |
A delta-sigma-modulator (DSM)-less digitally controlled oscillator (DCO) based on 65-nm CMOS technology, incorporating a fractional-capacitor and ground-shield techniques, for a GSM/EDGE transmitter was developed. The fractional-capacitor and ground-shield techniques, respectively, achieve high frequency resolution (0.6 kHz) without a conventional DSM and small differential non linearity (DNL) of DCO gains (0.12 LSB). A transmitter using the DCO exhibits both low phase error (0.9 degree) and in-specification receiver-band noise (<-165 dBc/Hz) thanks to the high frequency resolution and small DNL. |
| （英） |
A delta-sigma-modulator (DSM)-less digitally controlled oscillator (DCO) based on 65-nm CMOS technology, incorporating a fractional-capacitor and ground-shield techniques, for a GSM/EDGE transmitter was developed. The fractional-capacitor and ground-shield techniques, respectively, achieve high frequency resolution (0.6 kHz) without a conventional DSM and small differential non linearity (DNL) of DCO gains (0.12 LSB). A transmitter using the DCO exhibits both low phase error (0.9 degree) and in-specification receiver-band noise (<-165 dBc/Hz) thanks to the high frequency resolution and small DNL. |
| キーワード |
（和） |
DCO / Cellular / DSM less / Fractional capacitor / Ground shield / DNL / phase error / receiver-band noise |
| （英） |
DCO / Cellular / DSM less / Fractional capacitor / Ground shield / DNL / phase error / receiver-band noise |
| 文献情報 |
信学技報 |
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