1. Video transcript - [Voiceover] Alright, so now I'm gonna do the analysis of this op-amp configuration again, and I'm gonna do it using the idea of virtual ground. There are two titles to the article as presented to me: “The Top 10” and “The Best”; these are not the same thing. The difference is that it is measured with an output load and therefore takes into account loading effects. Look at 19:30 on the vid. Download Symbol, Footprint & 3D Model on SnapEDA. U(IC) – Best TL082/TL072 and other high slew rate opamps for lowest distortion, BA4558 or any 4558 opamps will work too, LM358 will work but with much worse high-frequency performance (distortion above 5kHz). Common opamps, such as the fabled LM741 or LM358,  LM324 (LM358 in a quad package) and BA4558 have an open-loop gain of around 100 000, unity-gain bandwidth of around 1MHz and input resistances of around 1MΩ. These input signals are given to the inverting terminal of the operational amplifier using input resistors like Ra, Rb and Rc. This is the currently selected item. Now the feedback voltage from the output combines with the input voltage and since these voltages are of opposite polarities the resulting voltage is zero volts, explaining the low input impedance. 2N3904 and 2N3906 for 50mW at 4Ω and 100mW at 8Ω (5V-9V supply), BD139 and BD140 for 4W at 4Ω and 7W at 8Ω (12V), TIP120, TIP125 up to 20W at 4Ω and 12W at 8Ω (12V, more at 24V). However again, I need to know in which applications this amp is best, and what should drive me to use a Norton amp instead of a voltage amp. U – LM741, TL081, TL071, LM358, BA4558 or any other common opamp, even a power amplifier like TDA2030 can work. There are 3 main amplifier configurations of opamps with negative feedback: This type of amplifier is a special one because no negative feedback is used to limit the gain. It has a –3dB bandwidth of 900 MHz and 1600 V/µs slew rate. Stan Gibilisco and Simon Monk – “Teach Yourself Electricity and Electronics, Sixth Edition”,  McGraw-Hill Education, 2016, ISBN 978-1-25-958553-1, Multiple Authors – “Poradnik Radioamatora, Wydanie drugie zmienione”, WKŁ, Warsaw 1983, ISBN 83-206-0307-2, Your email address will not be published. LM358 has a slew rate of around 0.55V/μs. Important op amp circuits that use energy-storage elements include integrators and differentiators. With a 47kΩ potentiometer, it can work from fractions of a Hz to hundreds of kHz, with only values of C4 changing, depending on the desired frequency range. Whether you’re a professional electronics designer or just getting started, it is likely you’ve used an op amp in your designs. The LM339 is the most commonly used quad differential comparator, it comes in an 14-pin PDIP, SOIC, SOP, SSOP or TSSOP package, it is characterized for operation from 0°C to 70°C and it has a typical input offset voltage and current of 2mV and 3nA respectively. If the signal is weak, let’s say 10μV, and our opamp has an open-loop gain of 100 000, the output signal will be 1V. Feedback components like these are used to determine the operation of the amplifier. Therefore, R f = -A CL x R 1 Q1, Q2 – Both transistors matched (roughly the same hFE). The op-amp can be considered to be a voltage amplifying device that is designed to be used with external feedback components such as resistors and capacitors between its output and input terminals. The allowable operating voltage range of an op amp should be considered, hence it’s maximum supply voltage should not be exceeded. Average price across distributors at time of publish: $0.50 USD. High Gain Amplifiers. Operational Amplifier Uses . 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