| 摘要 |
PURPOSE:To display a digital value closest to a radio wave arrival direction stably and continuously by preventing the repetition of frequent variation of the least significant digit of digital display through a reversible counter, frequency dividers, flip-flop, regulator, etc. CONSTITUTION:The arrival direction of a radio wave is displayed on a display device 7 with outputs of a main counter 1 with a full-scale 360 and a slave counter 4. When the output (c) of this counter 4 comes close to the leading edge of an output pulse (b) pulsating owing to vibrations of antennas 10 and 11 of a receiver 0 receiving the arriving radio wave, the reversible counter 23 is reset through AND gates 21 and 22, frequency dividers 24 and 25, an FF26, a monostable multivibrator 28, etc. Then, the regulator 5 is controlled through the counter 23 to inhibit a shift in the counting phase of the counter 4, and the display device 7 displays the radio wave which arrives in the intermediate direction between two digital values as a digital value close to one value stably and continuously. |
