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Amplifiers: Output stage - Lenard Audio
https://education.lenardaudio.com/en/12_amps_5.html
Darlington complementary is the basic order in how the output stage of an amplifier is taught. All output transistors are arranged as emitter followers. The collectors are connected directly to the rails. The emitter follows the signal on base within 650mV. The output transistors do not increase the size of the audio signal. Output transistors can only add …
Amplifiers: Solid state amplifiers - Lenard Audio
https://education.lenardaudio.com/en/12_amps.html
The principles of each section will be described, beginning with the output stage. The output stage consists of 2 or more large output transistors bolted to a heat sink (NPN and PNP). A solid state amplifier has 2 (DC) power supplies (+V and -V). The 2 power supplies are connected in series. The middle is connected to the chassis.
Tubes Versus Solid-State Audio Amps ... - Electronic Design
https://www.electronicdesign.com/technologies/analog/article/21794430/tubes-versus-solidstate-audio-ampsthe-last-word-or-house-of-fire-part-2
The audio transistor used in a linear amplifier’s output stage typically is a fairly high-voltage device. Most substantial amplifiers use 250-V transistors, rated for somewhere around 15 A. These...
Design of a Fully Differential Power Output Stage for …
https://hal.archives-ouvertes.fr/hal-01348803/document
This paper presents a full-bridge discrete power output stage for a Class D audio amplifier using a single-ended power supply. The circuit receives a digital control signal with 5 V of amplitude and it generates a floating differential output voltage up to 20 V …
Hybrid vacuum tube/solid-state audio power amplifier - EDN
https://www.edn.com/hybrid-vacuum-tube-solid-state-audio-power-amplifier/
Potentiometer P1 is adjusted for 0V on the speaker output. Once set, the feedback loop holds this very close to zero. C9, C10, C11, and C12 should be mounted as close as possible to the output devices. Idle current may be measured across TP+ and TP- (1mV represents 10mA). The square wave performance over a range of 10Hz to 50kHz is very good.
Audio Power Amplifier - de Smith
https://www.desmith.net/NMdS/Data/Books%20and%20Manuals/Self%20-%20Audio%20Power%20Amp%20Design%20Handbook%204th%20Edn.pdf
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 of DC servos 385 15.
A Solid-State Single-Ended Power Amp - audioXpress
https://audioxpress.com/article/a-solid-state-single-ended-power-amp
Once the output stage is working, start on the current source for the input. Install both terminal strips and mount Q3. Install R5, R6, C2, C6, C7, D1, and D2. Once these parts are connected, temporarily connect a 100Ω ¼W resistor from the positive supply to the collector of Q3. Expect to measure about 5 to 10V across this resistor. Be happy!
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