It made use of the signal automatic gain control (AGC) and complex logical control to realize the precise measurement of the ultrasonic signal, and made use of the logical analytical method to realize double frequency and 160 MHz frequency of the counter.

 
  • 利用超聲波信號的自動(dòng)增益控制 (AGC)和復雜的邏輯控制實(shí)現信號的精確測量 ; 利用邏輯分析實(shí)現倍頻 ,使計數器的計數頻率達到 16 0 MHz;
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