It is supposed that the relation between the analog current and the summation of the digital current value of picture element is equal.
根据显象管阴极电流模拟值等于整幅图象的电流数字值之和的原理，可推出各象素的发射电流密度。
Abstrct: the electrical parameters Tester through AT89C51 SCM as a core element of control by the analog switch HCF4051 constitute a range digital multimeter.
本电参数测试仪通过AT 89 C51单片机作为核心的控制元件，由模拟开关hcf 4051构成自动量程数字万用表。
The second selected element selects one of the second groups of voltage references as an output analog voltage according to N-M least significant bits of the N-bit digital signal.
第 二选择单元依据N位数字信号的N-M个最低位，选择第二组参考电压之一作为输出模拟电压。
The second selected element selects one of the second groups of voltage references as an output analog voltage according to N-M least significant bits of the N-bit digital signal.
第 二选择单元依据N位数字信号的N-M个最低位，选择第二组参考电压之一作为输出模拟电压。
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