Time-interleaved ADCs for full-band cable television receivers

对于大多数加拿大人来说，同轴电缆为我们的家庭提供了最大容量的数据连接，能够 在1 GHz带宽上承载数百个有线电视频道和互联网流量。有线电视和互联网 如今的接收器通常使用模拟滤波器，可调至只接收单个频道。这简化了其余的工作 这是因为占用其他信道的信号不能干扰。然而，具有以下能力的接收器 将有线频谱的更宽带宽数字化，可以使用数字信号选择和分离频道 处理(DSP)，实现多个通道的同时接收。这种技术还将允许 通信标准不断发展，以允许信道聚合以承载更高带宽的数据和 更高质量的视频流。最终的解决方案是同时将整个有线电视数字化 带宽。这将消除对模拟滤波器的需要，从而减小接收器的尺寸和成本，同时 最大限度地发挥接收器的功能。此外，这样的体系结构可以很容易地重新配置以 只需对DSP重新编程即可改变要求。 实现这种灵活的接收器的关键障碍是模数转换的实现 能够对整个有线电视频谱进行数字化的转换器(ADC)。它用标准的CMOS码实现 芯片制造技术将允许它与DSP一起在同一芯片上制造，从而减少 总体功耗、大小和成本。总而言之，对具有以下特性的CMOSADC的需求越来越大 足够的带宽直接数字化整个有线电视频谱和足够的动态范围，供100‘S 有线电视频道。 该项目的行业合作伙伴Kapik集成距离UofT实验室和办公室仅1公里，拥有 在技术上处于领先地位，并在这一领域寻求增长。这是我们的共同目标

For most Canadians, a coaxial cable provides the highest capacity data connection to our homes capable of carrying hundreds cable TV channels plus internet traffic over a 1 GHz bandwidth. Cable TV and internet receivers today typically employ analog filters tuned to receive only a single channel. This simplifies the rest of the receiver since signals occupying other channels can not interfere. However, a receiver with the ability to digitize wider bandwidths of the cable spectrum could select and separate channels using digital signal processing (DSP), enabling simultaneous reception of multiple channels. Such technology would also allow communication standards to evolve to permit the aggregation of channels to carry higher bandwidth data and higher quality video streams. The ultimate solution is to simultaneously digitize the entire cable TV bandwidth. This would obviate the need for analog filters, thus reducing the receiver's size and cost while also maximizing the receiver's functionality. Moreover, such architectures could be readily reconfigured for changing requirements by simply reprogramming the DSP. The key impediment to realizing such a flexible receiver is the implementation of an analog-to-digital converter (ADC) capable of digitizing the entire cable TV spectrum. Its implementation using standard CMOS chip manufacturing technology would allow for its fabrication on the same chip alongside the DSP, reducing the overall power consumption, size, and cost. In summary, there is a growing need for CMOS ADCs with sufficient bandwidth to directly digitize the entire cable TV spectrum and sufficient dynamic range for 100's of cable TV channels. The project's industry partner, Kapik Integration, is located only 1 km from UofT labs and offices, has tremendous technical leadership and is pursuing growth in this area. It is our collective objective with this