| 摘要 |
PROBLEM TO BE SOLVED: To provide a digital filter having a small-scale circuit and capable of reduction in power consumption. SOLUTION: A multiplier 1, a first adder 2 and a second adder 3 perform a filter operation to data inputted into a digital filter 10. A first output data storage portion 5 stores output data of the second adder 3. A second output data storage portion 6 stores the output data of the multiplier 1 and the first adder 2. A factor memory 7 outputs a multiplication factor of the multiplier 1. An input select portion 8 selects either the input data and the output data of a digital filter 10, and outputs it to the multiplier 1. A status controller 4 outputs a control signal for controlling switching of the operation status as 1 cycle for two or more different operation statuses. It outputs a result of an operation of 1 cycle as the output data of the digital filter 10. COPYRIGHT: (C)2006,JPO&NCIPI
|
