Handbook for Sound Engineers

712 Chapter 20 importance in modern audio applications and more particularly those that are readily implemented by means of acti ...

Amplifier Design 713 These are often written in a normalized form such as 1. 2. 3. In the Butterworth polynomials, Z 0 =2Sf0, wh ...

714 Chapter 20 (20-17) from which it is found that (20-18) By choosing for C a value of 0.02PF, Eq. 20-18 yields a value for R o ...

Amplifier Design 715 (20-20) Upon choosing R 1 =R 2 , Eq. 20-20 dictates that C 1 =4C 2. If C 1 is chosen to be 0.02μF, then C 2 ...

716 Chapter 20 (20-25) Substitution into Eq. 20-23 while invoking the neces- sary value of Z 0 leads to or (20-26) If C 2 is tak ...

Amplifier Design 717 at the individual load devices be of high quality. Poor quality transformers with either high insertion los ...

718 Chapter 20 Fig. 20-20 represents a circuit configuration that is superficially similar to Fig. 20-19 but is drastically diff ...

Amplifier Design 719 Fig. 20-22 is a complete though modest amplifier. Q 1 and Q 2 are complementary symmetry monolithic darling ...

720 Chapter 20 of hard relay contacts energized by suitable circuitry. Upon turn-on these contacts are open and are subse- quent ...

Amplifier Design 721 stages in classes A, AB, or AB + B have poor output power efficiencies and/or appreciable internal power di ...

722 Chapter 20 audio input signal and the feedback signal, which in the language of operational amplifiers means it is the error ...

Amplifier Design 723 The composite transistors at 1 and 2 are mounted directly without electrical insulators in order to ensure ...

724 Chapter 20 The operation of the negative half mirrors that of the positive half for negative swings of the output signal. On ...

Amplifier Design 725 resistance when cold and a decreasing resistance as the device heats up from the passage of current. This b ...

726 Chapter 20 truly represents the expression, “thinking outside of the box.” The innovation put forth by the Swedish firm Lab. ...

Amplifier Design 727 In Fig. 20-36 the batteries represent the positive and negative rail supplies, Sp and Sn represent two grou ...

728 Chapter 20 The three sketches in the top portion of the figure describe, respectively, the operation of the positive switch, ...

Amplifier Design 729 BCA is zero. This condition corresponds to the times when Sp and Sn are simultaneously both on or both off. ...

730 Chapter 20 based on analog techniques and slowly gave way to digital techniques as this newer technology developed. Digital ...

Amplifier Design 731 control of all of the elements associated with even the most sophisticated sound systems. Crown’s original ...