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EETimes - Op amps in small-signal audio design - Part 1 ...
https://www.eetimes.com/op-amps-in-small-signal-audio-design-part-1-op-amp-history-properties/#:~:text=Audio%20design%20has%20for%20many%20years%20relied%20on,input%20bias%20currents%20and%20low%20cost%20were%20important.
EETimes - Op amps in small-signal audio design - Part 1 ...
https://www.eetimes.com/op-amps-in-small-signal-audio-design-part-1-op-amp-history-properties/
By Douglas Self 05.25.2011 0. Audio design has for many years relied on a very small number of op-amp types; the TL072 and the 5532 dominated the audio small-signal scene for many years. The TL072, with its JFET inputs, was used wherever its negligible input bias currents and low cost were important. For a long time the 5534/5532 was much more …
EETimes - Op amps in small-signal audio design - Part 3 ...
https://www.eetimes.com/op-amps-in-small-signal-audio-design-part-3-selecting-the-right-op-amp/
The OP275 Op-Amp The Analog Devices OP275 is one of the few op-amps specifically marketed as an audio device. Its most interesting characteristic is the Butler input stage, which combines bipolar and JFET devices. The idea is that the bipolars give accuracy and low noise, while the JFETs give speed and 'the sound quality of JFETs'.
Op amps in small-signal audio design - Part 1: Op amp ...
https://www.eenewsanalog.com/content/op-amps-small-signal-audio-design-part-1-op-amp-history-properties/
Audio design has for many years relied on a very small number of op-amp types; the TL072 and the 5532 dominated the audio small-signal scene for many years. The TL072, with its JFET inputs, was used wherever its negligible input bias currents and low cost were important.
EETimes - Op amps in small-signal audio design - Part 4 ...
https://www.eetimes.com/op-amps-in-small-signal-audio-design-part-4-selecting-the-right-op-amp-jfet-input-types-reviewed/
The TL072 Op-Amp. The TL072 is one of the most popular op-amps, having very-high-impedance inputs, with effectively zero bias and offset currents. The JFET input devices give their best noise performance at medium impedances, in the range 1–10 kO.
EETimes - Op amps in small-signal audio design - Part 2 ...
https://www.eetimes.com/op-amps-in-small-signal-audio-design-part-2-distortion-in-bipolar-and-jfet-input-op-amps/
The effect may be present but if so it is very small, no doubt because op-amp signal input currents are also very small, and it is lost in the noise. The only difference is that the series circuit has a CM voltage of about 3 Vrms, while the shunt circuit does not, and the conclusion is that with a bipolar input op-amp you must have both a CM voltage and a …
Op amps in small-signal audio design - Part 1: Op amp ...
https://www.eenewsanalog.com/content/op-amps-small-signal-audio-design-part-1-op-amp-history-properties/page/0/8
Audio design has for many years relied on a very small number of op-amp types; the TL072 and the 5532 dominated the audio small-signal scene for many years. The TL072, with its JFET inputs, was used Op amps in small-signal audio design - …
Op amps in small-signal audio design - Part 1: Op amp ...
https://www.eenewsanalog.com/content/op-amps-small-signal-audio-design-part-1-op-amp-history-properties/page/0/7
Douglas Self discusses the history of the op amp and its properties and focuses on the design challenges facing op amps in small-signal audio design. there may be a general rise at all frequencies. Often both effects occur, as in the TL072. The lowest load that a given op-amp can be allowed to drive is an important design decision.
Small Audio Power Amplifier Using Op-Amp and Two ...
https://www.deeptronic.com/electronic-circuit-design/small-audio-power-amplifier-using-op-amp-and-two-transistors/
This voltage is slightly higher than base-to-base bias requirement to produce small leakage current when there is no signal. The op-amp output is connected to the center of diode-resistor biasing circuitry, and this signal manipulate the biasing point. At idle condition, when there is no signal in the input, the output should be bet at Vcc/2.
Small Signal Audio Design: Self, Douglas: …
https://www.amazon.com/Small-Signal-Audio-Design-Douglas/dp/0415709733
This is the second edition of Small Signal Design. It's a fascinating book if you are interested in electronic design in the audio field. Mr. Self has included very through explanations of transistor and op amp circuits related to small signal audio design. He explains how circuits work and which characteristics of circuits are important.
Audio Power Amplifier - de Smith
https://www.desmith.net/NMdS/Data/Books%20and%20Manuals/Self%20-%20Audio%20Power%20Amp%20Design%20Handbook%204th%20Edn.pdf
4. The small signal stages 75 5. The output stage I 109 6. The output stage II 166 7. Compensation, slew-rate, and stability 186 8. Power supplies and PSRR 239 9. Class-A power amplifiers 259 10. Class-G power amplifiers 294 11. Class-D amplifiers 319 12. FET output stages 328 13. Thermal compensation and thermal dynamics 339 14. The design ...
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