Audio Engineering

322 Chapter 10 10.4.10 Class-S Class-S, so named by Doctor Sandman,^13 uses a Class-A stage with very limited current capability ...

Audio Amplifi er Performance 323 be specifi ed as a mixture of Class-A and -C, which says nothing about the basic principle of o ...

324 Chapter 10 voice-coil resistance with heat dissipation, but introduces others, such as control of the cone resonance. Curren ...

Audio Amplifi er Performance 325 device off anyway, when current fl ows. The need for drivers, with their extra junction drops, ...

326 Chapter 10 maximum symmetrical voltage swing; a large DC-blocking capacitor is therefore used in series with the output. The ...

Audio Amplifi er Performance 327 10.5.2 Advantages of DC Coupling No large and expensive DC-blocking capacitor is required. How ...

10 100 1 K 10 K 50 K 6800/100 V 40 W/8Ω 3 dB 2.9 Hz 0.050 0.010 0.001 0.005 Audio precision power AMP THD  N(%) vs Freq.(Hz) 0 ...

Audio Amplifi er Performance 329 (4700μ F/63 V) gave Figure 10.8 , where the midband distortion is gone, but the LF distortion r ...

330 Chapter 10 The supply currents can be kept out of the ground system. A single-rail AC amplifi er has half-wave Class-B curr ...

Audio Amplifi er Performance 331 that the NFB factor varies strongly with frequency, an inconvenient fact that many audio commen ...

332 Chapter 10 10.6.1 Some Common Misconceptions About Negative Feedback All of the comments quoted here have appeared many time ...

Audio Amplifi er Performance 333 factor. This causes HF instability, which has to be cured by increasing the compensation capaci ...

334 Chapter 10 open-loop bandwidth and slew rate have nothing to do with each other and may be altered independently. Open-loop ...

Audio Amplifi er Performance 335 Sampei , et al , ‘ Highest effi ciency and super quality audio amplifi er using MOS-power FETs ...

This page intended left blank ...

Valve (Tube-Based) Amplifi ers John Linsley Hood Although the bulk of modern electronic circuitry is based on “ solid-state ” co ...

338 Chapter 11 It helps to understand the way in which valves work, and how to get the best performance from them, if one unders ...

Valve (Tube-Based) Amplifi ers 339 It is possible to use a plain tungsten fi lament as a cathode, but it needs to be heated to s ...

340 Chapter 11 anode current resistance,Ra , which is measured by the current fl ow for a given applied voltage— as shown in the ...

Valve (Tube-Based) Amplifi ers 341 It is this quality that is the most useful aspect of a valve in that a quite large anode curr ...