Comparator
比较器
| The extremely large open-loop gain of an op-amp makes it an extremely sensitive device for comparing its input with zero. For practival purposes, if 运算放大器极高的开环增益使其成为一种极其敏感的器件，用于将其输入与零进行比较。对于实际应用而言，如果
 the output is driven to the positive supply voltage and if 输出被驱动到正电源电压，并且如果
 it is driven to the negative supply voltage. The switching time for - to + is limited by the slew rate of the op-amp. 它被驱动到负电源电压。从-到+的切换时间受运放的斜率率限制。
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Electronics concepts
Op-amp concepts
索引 电子学概念 运算放大器概念
| HyperPhysics*****Electricity and magnetism
HyperPhysics ***** 电磁学 | R Nave |
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at the slightest difference between its inputs. But there are many variations where the output is designed to switch between two other voltage values. Also, the input may be tailored to make a comparison to an input voltage other than zero.