A 1 GHz Sample Rate, 100-Channel, 2-Bit, Single-Chip CMOS Digital Correlator Spectrometer

1 GHz 采样率、100 通道、2 位、单芯片 CMOS 数字相关器光谱仪

• 批准号: 9260808
• 负责人: Constantin Timoc
• 金额: $ 4.98万
• 依托单位: Spaceborne Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-01-01 至 1993-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9260808&HistoricalAwards=false
• 关键词: GHz; Sample; Rate; 100; Channel

The proposed correlator chip is intended for the two main application areas in radio astronomy: cross-correlation spectroscopy in aperture synthesis arrays and autocorrelation spectroscopy at cm and mm wavelengths. The objectives of Phase I are to design, simulate, and layout a CMOS digital correlator chip with the following characteristics: a) 1 GHz sample rate, b) 10 channels, c) 2-bit (four-level) quantization, and d) 32-bit counter/accumulator. It has already been demonstrated experimentally that the 1 GHz sampling rate can be achieved with a combination of systolic architecture, novel pipeline differential logic circuits, and a 1.0 um CMOS fabrication process. The objectives of Phase II are to increase the number of channels per chip to 100 while maintaining the 1 GHz clock frequency and the 4-level quantization scheme. Provision will also be made for a number of features such as 1-bit correlation for solar burst observation, blanking of correlation coefficients for pulsar observations, and phase switch mode. The commercial market for correlator chips is estimated at two to five million dollars in 1992 and it will grow 15% to 20% annually. Presently, most digital correlator chips are designed by each radio astronomy laboratory for their own internal use. The performance- to-cost ratio of the proposed correlator chip will be up to 10 times higher than that of existing correlators.

所提出的相关芯片主要用于射电天文学的两个主要应用领域：孔径合成阵列中的互相关光谱和cm和mm波长的自相关光谱。第一阶段的目标是设计、模拟和布局一个具有以下特性的CMOS数字相关芯片：a) 1 GHz采样率，b) 10通道，c) 2位（四电平）量化，d) 32位计数器/累加器。实验已经证明，通过结合收缩结构、新颖的流水线差分逻辑电路和1.0 um CMOS制造工艺，可以实现1 GHz的采样率。第二阶段的目标是将每个芯片的通道数量增加到100个，同时保持1 GHz时钟频率和4级量化方案。还将提供一些功能，如观测太阳爆发的1位相关性，观测脉冲星的相关系数的空白，以及相位开关模式。1992年，相关芯片的商业市场估计为200万至500万美元，并将以每年15%至20%的速度增长。目前，大多数数字相关芯片都是由各射电天文实验室自行设计，以供内部使用。所提出的相关芯片的性能成本比将比现有的相关芯片高出10倍。