| 摘要 |
PURPOSE:To eliminate noise continuously while the result is converged into an input signal, with the output amplitude independently of noise rejection ratio, in following to the change in the input signal by synchronizing summing the repetitive input signals. CONSTITUTION:An input signal 41 is compared with an output signal 42 up to now at a subtractor 8, the difference is attenuated at a divider 9 and summed with the output signal 42 at an adder 1. The result is stored to a storage element 2 as a new output and outputted. The relation of An+1=An+1/N (E- An) is obtained where E is the input signal, 1/N is the attenuation of the divider 9, An is an output up to now, and An+1 is a new output. In this equation, when An=E, then An+1=E is obtained, which indicates that the output is in dependent of the attenuation of the divider 9 and the output is converged to a value equal to the input, and when the input is a repetitive waveform, the output follows the input with time lag of first order. The circuit shown in Figure can easily be constituted digitally and also analogically. |
