| 摘要 |
PURPOSE:To output a mark and space frequency signal with a low distortion rate by supplying the output of a staircase wave generating circit consisting of a timing circit and a level fixing circuit to an LPF. CONSTITUTION:An NRZ signal impressed from a transmitted NRZ data input circuit 12 is passed through a chattering preventing circuit 16 to control the frequency division ratio of a variable frequency dividing circuit 13. Then, a clock signal 11 is applied to the circuit 13, whose output controls the level fixing circuit 15 through a timing circuit 14. Thus, a staircase wave signal generated by the staircase wave generating circuit 19 is passed through the LPF17 and the signal with the low distortion factor appears at an MSK modulation output terminal 18. |
