| 摘要 |
PURPOSE:To realize a simple, miniature, lightweight, and low-cost constitution by taking a synthesizer out of a PLL and by attaining equivalent-Doppler conversion using a multiplier circuit. CONSTITUTION:Multiplier/converter circuit 11 attains multiplication to resolution required for Doppler measuring precision, frequency-converts adequately a multiplied signal, and counts a frequency within the measuring range of frequency counter 10. The output of counter 10 is extracted as BCD output and inputted to multiplier-divider circuit 12. To multiplier-divider circuit 12, conversion frequency set control signal is inputted and its calculation value is outputted again as the BCD signal. The multiplier-divider circuit like this can be substituted with an exclusive-use digial calculation circuit, so that is can be constituted in an extremely- easy way. |
