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Amplifiers and Comparators
In electronics, a comparator is a device that compares two voltages or currents and outputs a digital signal indicating which is larger. It has two analog input terminals V_+\, and V_-\, and one binary digital output V_o\,. The output is ideally A comparator consists of a specialized high-gain differential amplifier. They are commonly used in devices that measure and digitize analog signals, such as analog-to-digital converters (ADCs), as well as relaxation oscillators. An operational amplifier (op-amp) has a well balanced difference input and a very high gain. This parallels the characteristics of comparators and can be substituted in applications with low-performance requirements.[4] In theory, a standard op-amp operating in open-loop configuration (without negative feedback) may be used as a low-performance comparator. When the non-inverting input (V+) is at a higher voltage than the inverting input (V-), the high gain of the op-amp causes the output to saturate at the highest positive voltage it can output. When the non-inverting input (V+) drops below the inverting input (V-), the output saturates at the most negative voltage it can output. The op-amp's output voltage is limited by the supply voltage. An op-amp operating in a linear mode with negative feedback, using a balanced, split-voltage power supply, (powered by ± VS) has its transfer function typically written as: V_{out}=A_{o} (V_1 - V_2). However, this equation may not be applicable to a comparator circuit which is non-linear and operates open-loop (no negative feedback)
Linear > Amplifiers and Comparators > OP AMP
Вариации номера комплектующего
- AS230
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- AS230AAAS
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- AS2333C
- AS2333CF
- AS2333E
- AS2333FGE7
- AS2333M813
- AS2333QS13
- AS2333S13
- AS233E
- AS2348
- AS2348M813
- AS2348S13
- AS2350C
- AS236321FL
- AS236321LF
- AS236321LFEVB
- AS2375018SMD
- AS2376S13
- AS239
- AS2390
- AS2390J
- AS23912
- AS2395
- AS239OHM5
- AS23AH
- AS23OHM2