Audio Engineering

302 Chapter 9 control the drain current and the device is defunct. Because it is theoretically possible for an inadvertent elect ...

Audio Amplifi ers 303 from localized thermal breakdown in the MOSFET is that the mobility of the electrons (or holes) in the cha ...

304 Chapter 9 of VHF instability, which can, in the hands of an unwary amplifi er designer, lead to the rapid destruction of the ...

Audio Amplifi ers 305 A further benefi t enjoyed by the MOSFET is that it is a majority carrier device, which means that it is f ...

306 Chapter 9 each of which will contribute its own element of capacitance, it is understandable that these low channel resistan ...

Audio Amplifi ers 307 Although circuit designers tend to be rather lazy about using the proper symbols for the components in the ...

308 Chapter 9 layouts is that shown in Figure 9.24(a) , in which the transistor, Q 1 , is fed with a fi xed base voltage—in this ...

Audio Amplifi ers 309 which is labelediref. This particular action is called a current mirror, and several further versions of t ...

310 Chapter 9 Figure 9.26 : Circuit oddments. (a) DC bootstrap R 1 Q 1 Output 0V R 2 Input V (b) JFET active load Q 1 R 1 V Ou ...

Audio Amplifi ers 311 in Figure 9.26(a) , and the JFET active load, shown in Figure 9.26(b) , act to increase the dynamic impeda ...

312 Chapter 9 that the amplifi er does not receive any input signal that requires rates of change greater than the level that ca ...

Audio Amplifi er Performance Douglas Self 10.1 A Brief History of Amplifi ers .................................................. ...

314 Chapter 10 predecessors. At about the same time, DC-coupled amplifi ers began to take over from capacitor-coupled designs, a ...

Audio Amplifi er Performance 315 voltage in, current out), the second a transimpedance stage (current in, voltage out), and the ...

316 Chapter 10 10.3.1 Two-Stage Amplifi er Architecture In contrast, the architecture shown in Figure 10.2 is a two-stage amplif ...

Audio Amplifi er Performance 317 frequency associated with the input stage collector will no longer work so well. (I have used t ...

318 Chapter 10 The other kind could be called a controlled-current source type, which is, in essence, a single emitter–follower ...

Audio Amplifi er Performance 319 pulses and fi lters harmonics. Current-dumping amplifi ers can be regarded as combining Class-A ...

320 Chapter 10 The basic series Class-G with two rail voltages (i.e., four supply rails, as both voltage are ) is shown in Figur ...

Audio Amplifi er Performance 321 In principle, movements of the collector voltage on the inner device collectors should not sign ...