Locking circuit board support cs - type at richeng Pc板隔離柱cs
Rccn locking circuit board support cs - type material : ul approved nylon 66 , 94v - 2 by hand to support p . c . b 使用時(shí)先將基板鉆孔4 . 8mm后將隔離柱固定,再將p . c .板套入即可。
Dds is used to achieve fine resolution , while injection phase lock circuit is used to realize low phase noise high performance input reference frequency Dds用于實(shí)現(xiàn)小步進(jìn),而注入鎖相電路則用來(lái)產(chǎn)生低相噪的高性能參考源。
Lut was replaced by the method taking triangle wave and differential in the line phase locked circuit , so it saves the hardware area and cost 在行鎖相中,用取三角波然后差分的方法替換了查找表,減小了芯片面積,降低了成本。
Arranged signal activating lock circuit and time - base control circuit in the sound wave receiving circuit to take the initial signal of back wave as the valid one in the cycle , thus to improve the ratio of signal vs . noise and detective precision 在超聲波接收電路中設(shè)有信號(hào)觸發(fā)鎖定電路和時(shí)基控制電路。實(shí)現(xiàn)以各探頭中最早收到的回波信號(hào)為本檢測(cè)單元的有效信號(hào),有效提高信噪比和檢測(cè)精度; 4