| 摘要 |
A signal processor acting as a Wave Digital Filter (WDF) comprises a plurality of sub-processors (31-39) each having an associated input cell (21-29) for providing a difference data signal representative of the difference between a first input data signal (a1) and a second input data signal (a2) appearing at input ports of the input cell. Each sub-processor further comprises a plurality of sub-cells (A-E) which are arranged in groups to revive the first input data signal, the second input data signal and the difference data signal simultaneously and in parallel from the input cell associated with the sub-processors. The sub-cells have sub-sub-cells arranged to multiply the difference data signal by a filter coefficient ( gamma ) so as to provide a product data signal and to perform one or more predetermined arithmetic functions on the product data in accordance with a predetermined number system so as to provide emergent data which may be of at least two different data types and to transmit the emergent data according to its type to at least one different sub-cell of a different sub-processor during a subsequent clock pulse. The subsequent sub-cell or sub-cells into which the emergent data is transmitted is determined by the type of data generated during a previous clock cycle, the subsequent sub-cells having sub-sub-cells which are arranged to perform predetermined arithmetic functions on the data. The processor further comprises a plurality of output cells having first and second output ports so as to provide first and second output data signals representative of the filtered first and second input signals, the output data signals being provided by the sub-cells of a sub processor in accordance with the particular sequence of arithmetic function performed and the filter coefficients input to the sub-cells. The resultant Wave Digital Filter can operate up to a throughput rate of 100MHz and the latency of the processor is independant of word length. <IMAGE> |
