B Circuit Theory 电路理论
abb hpl b circuit breaker abbhpl550b2型断路器
b ntegrated Circuit 集成电路
mc b pll circuit mc14046bpll电路
PCB B rinted circuit board 印刷电路板
PCB B printed circuit board 印刷线路板
closing type circuit b reaker 复合式断路器€复合断路器
In order to ensure A phase and B phase circuits are symmetric, digital potentiometer X9C503 with exterior pressed key in the feedback amplification circuit is designed.
在反馈放大电路设计时，采用数字电位器X9C503与外部按键配合，达到了A、B两相电路的对称性。
The TTL video signal from PC is converted into R, G, B video signals through PC video interface circuit.
来自个人计算机（PC）的TTL视频信号由PC视频接口电路转换成R、G、B视频信号。
The row pulse signal forming circuit generates a row pulse signal B.
行脉冲信号形 成电路产生行脉冲信号B。
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