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KST555 1 NPN Epitaxial Silicon Transistor Absolute Maximum Ratings
KST555 1 NPN Epitaxial Silicon Transistor Absolute Maximum Ratings

... 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. ...


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ADP667 数据手册DataSheet 下载

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... one direction and goes through each part of the circuit. A flashlight with two batteries is a series circuit, because the power goes through the batteries to the lightbulb. The impedance (resistance to current) of an element can be represented using the complex number, V + Ii, where V is the element ...
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MJD340 NPN Epitaxial Silicon Transistor Absolute Maximum Ratings
MJD340 NPN Epitaxial Silicon Transistor Absolute Maximum Ratings

... 2. A critical component is any component of a life support which, (a) are intended for surgical implant into the body, device or system whose failure to perform can be or (b) support or sustain life, or (c) whose failure to perform reasonably expected to cause the failure of the life support when pr ...
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Operational amplifier



An operational amplifier (""op-amp"") is a DC-coupled high-gain electronic voltage amplifier with a differential input and, usually, a single-ended output. In this configuration, an op-amp produces an output potential (relative to circuit ground) that is typically hundreds of thousands of times larger than the potential difference between its input terminals.Operational amplifiers had their origins in analog computers, where they were used to do mathematical operations in many linear, non-linear and frequency-dependent circuits. The popularity of the op-amp as a building block in analog circuits is due to its versatility. Due to negative feedback, the characteristics of an op-amp circuit, its gain, input and output impedance, bandwidth etc. are determined by external components and have little dependence on temperature coefficients or manufacturing variations in the op-amp itself.Op-amps are among the most widely used electronic devices today, being used in a vast array of consumer, industrial, and scientific devices. Many standard IC op-amps cost only a few cents in moderate production volume; however some integrated or hybrid operational amplifiers with special performance specifications may cost over $100 US in small quantities. Op-amps may be packaged as components, or used as elements of more complex integrated circuits.The op-amp is one type of differential amplifier. Other types of differential amplifier include the fully differential amplifier (similar to the op-amp, but with two outputs), the instrumentation amplifier (usually built from three op-amps), the isolation amplifier (similar to the instrumentation amplifier, but with tolerance to common-mode voltages that would destroy an ordinary op-amp), and negative feedback amplifier (usually built from one or more op-amps and a resistive feedback network).
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