| 摘要 |
PURPOSE:To simplify the constitution of circulation type digital filter, by providing the input signal feedback register and output feedback register with the multiplier multiplying coefficient to the output signal of RAM. CONSTITUTION:The digital signal written in RAM 14 is read out with the readout signal in synchronizing with the main clock from the decoder 15 and fed to the multiplier 20, and after it is multiplied with the coefficient stored in RAM 18, it is fed to the adder 24 and added with the digital signal of the register 25. The output of the adder 24 is fed and stored in the output feed back register 28. Further, the output signal of RAM 14 is fed and stored in the multiplier input feedback register 23. After RAM 14 reads out the content of memory of the specified address designated with the output of the counter 16 incoming via the decoder 17, it writes in either one signal of the registers 23, 28 with the signal from the decoder 15 at the terminal 13, and digital signal represented in a given difference equation is outputted to obtain circulation type digital filter. |
