| 摘要 |
PURPOSE:To suppress the variance of a tap gain due to noise component included in an input signal, by supplying only the data of upper rank M-bit among the data in a tap gain memory to a D/A converter. CONSTITUTION:An output of a transversal filter 4 is differentiated 6, and the polarity is decided at a comparator 7, and the output is sampled and stored in a buffer memory 8 as the polarity deciding data, which is added 9' to the LSB of the data corresponding to the K-th tap gain of a tap gain memory 10' before the next vertical synchronizing signal is incoming. The tap gain memory 10' consists of a circulation type shift register in NX(M+L)-bit, where the number of taps of the transversal filter is N. The output of the upper rank M-bit only of this shift register is supplied to a D/A converter 11. |
