山东科技大学学报:自然科学版
山東科技大學學報:自然科學版
산동과기대학학보:자연과학판
Journal of Shandong Univ of Sci and Technol: Nat Sci
2011年
4期
86-94
,共9页
三角积分调变器%主动式电阻电容电路%数据加权平均电路
三角積分調變器%主動式電阻電容電路%數據加權平均電路
삼각적분조변기%주동식전조전용전로%수거가권평균전로
sigma-delta modulator%active RC circuit%DWA circuit
设计并实现应用于WiMAX的1.2 V连续时间三角积分(Δ-Σ)调变器的芯片,该调变器主要包含主动式电阻电容(active-RC)电路、数据加权平均(DWA,data-weighted averaging)电路、回授DAC电路和四位元(4-bit)量化器,芯片设计使用TSMC 0.18μm CMOS的制程来实现。量测结果显示,在取样频率160 MHz、超取样比(OSR,oversampling ratio)为8、频宽为10 MHz时,最大的讯号杂讯比(SNR,signal-to-noise ratio)与讯号杂讯失真比(SNDR)分别为51 dB与48 dB,ENOB=7.7位元(bit),动态范围为54 dB,包含焊接垫(pads)的芯片面积为1.156(0.9×1.284)mm2,功耗仅19.8 mW。
設計併實現應用于WiMAX的1.2 V連續時間三角積分(Δ-Σ)調變器的芯片,該調變器主要包含主動式電阻電容(active-RC)電路、數據加權平均(DWA,data-weighted averaging)電路、迴授DAC電路和四位元(4-bit)量化器,芯片設計使用TSMC 0.18μm CMOS的製程來實現。量測結果顯示,在取樣頻率160 MHz、超取樣比(OSR,oversampling ratio)為8、頻寬為10 MHz時,最大的訊號雜訊比(SNR,signal-to-noise ratio)與訊號雜訊失真比(SNDR)分彆為51 dB與48 dB,ENOB=7.7位元(bit),動態範圍為54 dB,包含銲接墊(pads)的芯片麵積為1.156(0.9×1.284)mm2,功耗僅19.8 mW。
설계병실현응용우WiMAX적1.2 V련속시간삼각적분(Δ-Σ)조변기적심편,해조변기주요포함주동식전조전용(active-RC)전로、수거가권평균(DWA,data-weighted averaging)전로、회수DAC전로화사위원(4-bit)양화기,심편설계사용TSMC 0.18μm CMOS적제정래실현。량측결과현시,재취양빈솔160 MHz、초취양비(OSR,oversampling ratio)위8、빈관위10 MHz시,최대적신호잡신비(SNR,signal-to-noise ratio)여신호잡신실진비(SNDR)분별위51 dB여48 dB,ENOB=7.7위원(bit),동태범위위54 dB,포함한접점(pads)적심편면적위1.156(0.9×1.284)mm2,공모부19.8 mW。
This study devoted to the chip design of a 1.2 V continuous-time sigma-delta(Δ-Σ)modulator for WiMAX applications.The proposed modulator mainly contains active-RC integrators,DWA(digital-weighted average)circuits,feedback DAC circuits,and a 4-bit quantizer and was fabricated in TSMC 0.18 um CMOS process.Measurement results showed that the chip achieved 51-dB SNR,48-dB SNDR,54-dB dynamic range and 7.7-bit ENOB at a signal bandwidth of 10 MHz and under the conditions of sampling rate of 160 MHz and OSR(oversampling ratio)of 8.The chip area including pads is 1.156(0.9×1.284)mm2 and the power consumption is 19.8 mW.