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具有16个数字可控支路的单片实时可编程序横向滤波器,按两个滤波器结构所组成,其中一个具有32个对称功能负荷另一个有16个非对称负荷。滤波器的NMOS结构供给各种适当的旋转及有关的信号处理,这样的信号处理在功率耗散、计算速度、尺寸和性能方面具有最佳的折衷方案。 器件性能通过斗链式电荷耦合器件(BBD)和现代化的开关电容器技术两者的结合来实现。用带有16个乘法数字模拟转换器(MDAC)按管系结构来构成32个斗(?)器件,每个斗链器件对有一个MDAC。图1表示了这种情况。注意,这种结构是用于32支路的对称滤波器。电荷再分配MDACS使输入信号经过一套二进制负荷的开关电容器倍增。一个8位正(加)号静态RAM控制开关,以便给MDAC一个9位乘法分解。每个
A monolithic, real-time, programmable transversal filter with 16 digitally controlled branches consists of two filter structures, one with 32 symmetrical functional loads and one with 16 asymmetrical loads. The NMOS structure of the filter provides a variety of suitable rotations and related signal processing, which provides the best compromise between power dissipation, computational speed, size and performance. Device performance is achieved through a combination of Bucket Chain Charge Coupled Device (BBD) and modern switched capacitor technology. 32 bucky devices are organized in a pipelined architecture with 16 multiply-digital-to-analog converters (MDACs), one MDAC per bucket chain device pair. Figure 1 shows this situation. Note that this structure is a symmetrical filter for 32 branches. Charge Redistribution MDACS multiplies the input signal by a set of binary load switched capacitors. An 8-bit plus (plus) static RAM control switch to give the MDAC a 9-bit multiply-break. Each one