IC + discrete RIAA circuit

Amplified circuit schematic

Selection of components:

R1-18 = 47K R15-16-32-33 = 150K C12-13-25-26 = 100nF 100V MKT
R2-19-13-29 = 270R R17-34 = 100R TR1-2 = 220R trimmer
R3-20 = 1K C1-14 = 1uF 100V MKT D1-2-3-4 = 1N4148
R4-5-21-22 = 150R C2-15 = 220pF * See text Q1-2-8-9 = BC214C [matched]
R6-23 = 2K2 C3-16 = 220pF Q3-10 = BC212
R7-30 = 82R C4-17 = 47nF 100V [matched] Q4-5-11-12 = BC183
R8-24 = 68K C5-18 = 100nF 100V MKT Q6-13 = BC640
R9-25 = 1M5 C6-19 = 470uF 25V Q7-14 = BC639
R10-26 = 3K9 C7-20 = 100uF 16V IC1 = TL072 - NE5532
R11-27 = 2K7 C8-9-21-22 = 47uF 25V J1-2-4-5 = Female RCA cinch
R12-28 = 33K C10-23 = 2.2uF 100V MKT J3 = 3pin connector 2.54mm step
R14-31 = 33K C11-24 = 1nF 100V [matched] All Resistors is 1 / 4W 1% metal film
Technical area detailed analysis of Doherty power amplifier design load traction principle (top) detailed analysis of Doherty power amplifier design how to improve efficiency (lower) voltage follower input and output error analysis lm386 power amplifier energization will produce noise causes and treatment methods analysis class d Solve the effect of power amplifier on emi

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