지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
Tunable SC(Switched Capacitor) bandpass Σ-Δ(Sigma-Delta) modulator used in wireless system receiver occurs a signal attenuation according to tuning of center frequency in signal bandwidth. In this paper, tunable bandpass 4th order SC bandpass Σ-Δ modulator with novel structure is proposed for rejection of signal attenuation in signal bandwidth. The existing structure uses a ten variable coefficient values for rejection of signal reduction in the modulator. But the proposed structure only use a two variable coefficient values for rejection of signal attenuation in the modulator. Also, an adder and comparator is replaced with a comparator having 4 inputs in the modulator. Therefore, the existing structure has one more OP-AMP. The purposed modulator was designed in 0.18 ㎛ CMOS technology. The resolution of the modulator within 310 ㎑ bandwidth and 40 ㎒ sampling frequency under 6.67 ㎒, 10 ㎒ and 13.33 ㎒ intermediate frequency are over 10 bit.
목차
Abstract
1. 서론
2. 제안한 구조의 Σ-Δ 변조기
3. 회로 설계
4. 모의실험 결과 및 고찰
5. 결론
참고문헌
저자소개
참고문헌 (4)
참고문헌 신청
G.Yin / 1994 / A high-frequency and high-resolution fourth order sigma-delta A/D converter in BiCMOS technology / IEEE J. Solid State Circuits 29:857~865
G.Yin / 1994 / A high-frequency and high-resolution fourthorder sigma-delta A/D converter in BiCMOS technology / IEEE J. Solid State Circuits 29:857~865
M. A. El-Nozahi / 2003 / Tunable bandpass sigma delta modulators / Proc. 46th IEEE Int. Midwest Symp. Circuits and Systems :229~232
Kentaro Yamamoto / 2008 / A Delta-Sigma Modulator With a Widely Programmable Center Frequency and 82-dB Peak SNDR / IEEE Journal of solid-state Circuits 43(8)
G.Yin / 1994 / A high-frequency and high-resolution fourthorder sigma-delta A/D converter in BiCMOS technology / IEEE J. Solid State Circuits 29:857~865
M. A. El-Nozahi / 2003 / Tunable bandpass sigma delta modulators / Proc. 46th IEEE Int. Midwest Symp. Circuits and Systems :229~232
Kentaro Yamamoto / 2008 / A Delta-Sigma Modulator With a Widely Programmable Center Frequency and 82-dB Peak SNDR / IEEE Journal of solid-state Circuits 43(8)
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UCI(KEPA) : I410-ECN-0101-2012-560-004010080