| 摘要 |
PURPOSE: A finite impulse response filter is provided, which sets a filter characteristic voluntarily by adjusting filtering data. CONSTITUTION: A multiplier(1) multiplies a digital input signal of an inner bus and a count value, and a memory(2) stores an output of the multiplier(1). The first adder(3) adds data stored in the memory(2) and the first data calculated in a filter of a previous stage. The first register(4) temporarily stores an output of the first adder(3) and outputs the first data to a filter of a next stage. The second adder(5) adds the data stored in the memory(2) and the second data calculated in a filter of a previous stage. The second register(6) temporarily stores an output of the second adder(5) and outputs the second data to a filter of a next stage.
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