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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
Part No. Variations
- 2227
- 222700241
- 222700A040
- 22270231
- 22270603
- 22270790
- 22270792
- 22270850001
- 22271031
- 22271032
- 22271045
- 222710780
- 222711011
- 222711081
- 222711091
- 222711101
- 222711102
- 222711221
- 222711281
- 22271141
- 222712871
- 222714574
- 222716270
- 222716686
- 222717301
- 222717910
- 2227180308F1
- 22271S14S
- 22272021
- 222720216410
- 22272031
- 22272041
- 222720416410
- 22272047
- 22272051
- 22272057
- 22272061
- 22272081
- 22272111
- 22272131
- 22272141
- 22272151
- 22272161
- 22272211
- 22272241
- 22272252
- 22272263
- 222728
- 2227280607
- 22272BC040010L
- 22273021
- 22273023
- 22273031
- 22273033
- 222731241
- 222731244
- 222731261
- 222731264
- 22273161
- 22273261
- 2227338
- 222740100
- 222744
- 222744002
- 222749
- 22275
- 222750
- 222754
- 222754001
- 2227543
- 222757069
- 22275801
- 22275811
- 22275951
- 22276101
- 22276682
- 22276692
- 22276707
- 22276712
- 222770
- 222770001
- 22277291
- 22277301
- 22277321
- 22279852
- 22279861
- 2227B
- 2227M37P01
- 2227MC080403F1
- 2227MC140310
- 2227MC140310F1
- 2227MC143TG
- 2227MC160309F1
- 2227MC1603F1
- 2227MC163TG
- 2227MC180308F1
- 2227MC200307F1
- 2227MC240306F1
- 2227MC280305F1
- 2227UA
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