Delta-sigma modulator using a resonant-tunneling diode quantizer

被引：0
|
作者：
Mutoh, M [1 ]
Fukuyama, H [1 ]
Itoh, T [1 ]
Enoki, T [1 ]
Shibata, T [1 ]
机构：
[1] NTT Corp, Photon Labs, Atsugi, Kanagawa 2430198, Japan
来源：
IEICE TRANSACTIONS ON ELECTRONICS | 2002年 / E85C卷 / 05期
关键词：
RTD quantizer; delta-sigma modulator; three cascoded RTD quantizers; quantization noise; a number of harmonics;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A novel delta-sigma modulator that utilizes a resonant-tunneling diode (RTD) quantizer is proposed and its operation is investigated by HSPICE simulations. In or er to eliminate the signal-to-noise-and-distortion ratio (SINAD) degradation caused from the poor isolation of a single-stage quantizer (1SQ) a three-stage quantizer (3SQ), which consists of three cascoded RTD quantizers, is introduced. At a sample rate of 10 Gsps (samples per a second) and a signal bandwidth of 40 MHz (over-sampling ratio of 128), the modulator demonstrates a SINAD of 56 dB. which corresponds to the effective number of bits of 9.3.
引用
收藏
页码：1219 / 1221
页数：3
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