| 摘要 |
PURPOSE:To track exactly a signal by detecting a speed component of a running body to a ratio transmitting station, varying a phase correcting quantity in accordance with said component, and correcting exactly a tracking timing. CONSTITUTION:A titled device is provided with a digital type phase comparing circuit 221, a frequency dividing circuit 223, a loop filter 231, a relative speed detecting circuit 250, a tracking timing correcting circuit 270, etc. In this state, a ratio wave 211 emitted from a ratio transmitting station is received, and a phase comparation of a binary-coded quantizing signal 219 obtained from a quantizing circuit 217 and a comparing signal 225 supplied from the circuit 223, and an operation for discriminating a lead or a lag of the phase of both the signals 225, 219 are executed by the circuit 221, and a reversiblecounter 233 in the filter 231. Also, as for the circuit 250, an operation processing part 251 contained in its inside executes an operation, and a relative speed signal 261 for showing its operated value VR is supplied to the circuit 270. Subsequently, in the circuit 270, a phase quantity corresponding to the phase correcting quantity is corrected, and therefore, a signal 243 is supplied to a terminal RT from an N resetting circuit. |
