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 C 51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。
Each memory element can store data represented in analog or digital form.
每个存储器元件可存储以模拟或数字形式表示的数据。
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