| 摘要 |
PROBLEM TO BE SOLVED: To improve the intelligibility on the acoustic feeling of a voice output by effectively removing a distortion component without making a tuning operation in a CW mode receiver difficult. SOLUTION: The CW mode receiver having a pitch control function includes a variable LPF of a receiving audio band which can be changed with a control signal about a cut-off frequency, and an interlocking means for interlocking the correlation of a pitch frequency in the pitch control function and the cut-off frequency in the variable LPF and changing it. COPYRIGHT: (C)2006,JPO&NCIPI
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