| 摘要 |
PURPOSE:To display a moving target by a simple constitution, by impressing on a comparing unit an indented wave signal processed by a receiver, so as to be compared with a signal of a filter unit forwarded via a sampling hold circuit. CONSTITUTION:An output of a gate generating unit 5 controlled by a position adjusting signal 9 controls an indented wave generating unit 6, and an indented wave output signal 7 and an output 3 of a receiver unit 2 are compared with each other by a first comparing unit 10. Next, the output signal of this unit is converted into a prescribed DC voltage by a sampling hold unit 11. Subsequently, it is turned to be a prescribed voltage in a prescribed band by a filter circuit unit 12. The output signal thereof is compared with the indented wave output signal 7 by a second comparing unit 13, and the result of the comparison is delivered as a pulse signal. The output signal of the second comparing unit 13 and the output 3 of the receiver unit are subjected to logical processing by a logic circuit unit 14 and then impressed on a display unit 8, whereby a moving or fixed target is displayed. |
