Text preview for : mini_soundfield02-01.pdf part of icarus 07748 PREAMP
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1
2 +BAT
3
4
5
6
7
8
A
3 2
1
C3 4.7NF
R16
5.1K
4
C1
100NF
R7 220R
U1A TL074
4
+BAT 10 9
U1C TL074 8
Note that addition is in fact inverting addition here. W jW X jX Y SIGMA+DELTA = 2L = 0.9397W - j0.3420W + 0.1856X + j0.5099X + 0.6555Y ideal value 10.64K R76 10K R95 82K R78 47K R80 18K R82 15K R77 680R R96 3.9K R79 6.8K R81 1.5K R83 270R 5 6 +BAT 4 +BAT C21 22UF GND C22 22UF -BAT U1B TL074 7
R8 22K R9 100R B C2 100NF GND
-BAT R10 39K R11 390R
11
R6 47K
R3 10K
R15 6.8K R13 10K R14 560R GND
R12 10K
-BAT R17 47K R18 820R
ideal value 86.15K
C4 4.7NF
ideal value 53.88K
J3 MLXM5 1 2 3 4 5
11
+BAT C5 100NF R22 470R 4 12 13 R21 10K R23 8.2K R24 1.2K C6 100NF GND R19 10K 11
ideal value 19.61K +BAT 4 U2A TL074 1
U1D TL074 14
C7
4.7NF
R28 390R
3 2
ideal value 15.26K
R25 47K
R26 1K
R29 2.2K R30 180R GND C8 4.7NF
-BAT R31 39K R32 390R
R5 10K GND
11 -BAT R4 10K UHJ Output Pin 1 LEFT Pin 2 Right R1 R2 47R 47R GND J1 MLXM3
C
-BAT
R27 4.7K
R20 10K
B Format In Pin 1 = W Pin 2 = X Pin 3 = Y D J2 MLXM5 1 2 3 4 5
11
SIGMA - DELTA = 2R = 0.9397W + j0.3420W + 0.1856X - j0.5099X - 0.6555Y +BAT 4 C9 100NF R36 220R 10 9 U2C TL074 8 +BAT C11 4.7NF R45 5.1K 12 13 11 11 -BAT R39 39K GND +BAT C13 100NF R51 470R 4 3 2 R40 390R R44 6.8K R42 10K R43 560R GND U3A TL074 1 +BAT C15 4.7NF R57 390R 4 5 6 11 -BAT R54 47K GND +BAT C17 100NF R64 220R 4 10 9 R63 47K R65 22K R62 10K 11 R55 1K R56 4.7K R58 2.2K R59 180R GND Note that you can only do this single op-amp trick with the +ve inputs when there are maximum of two +ve inputs that you're trying to sum, (well, in fact you can, it just gets harder to work out the values) C16 4.7NF R49 10K 11 C12 4.7NF R41 10K 4 R84 10K R86 27K R88 47K R91 24K R93 18K R85 680R R87 2.2K R89 6.8K R92 1.5K R94 1.8K +BAT 5 6 -BAT R60 39K R61 390R R90 10K 11 4
U2D TL074 14
ideal value 10.64K
1 2 3
GND
R35 47K R37 22K
R34 10K
ideal value 29.24K
-BAT R46 47K R47 820R
ideal value 53.88K
E
R38 100R
C10 100NF
ideal value 25.49K
ideal value 19.83K U3B TL074 7
U2B TL074 7
F
R50 10K R52 8.2K R53 1.2K C14 100NF
R48 10K
-BAT R33 10K
GND
G
8
C19 4.7NF
R73
5.1K
12 13
4
U3C TL074
+BAT
U3D TL074 14
-BAT R67 39K R68 390R
H
R66 100R
C18 100NF GND
R70 10K R71 560R GND C20 4.7NF
11 -BAT R74 47K R75 820R
R72 6.8K
R69 10K
mini_sooundfield01 DESIGN: NAME: mini soundfield TITLE: FILE: mini_soundfield02-01.sch UHJ Converter CREATED: 19/08/03 MOD: 27/10/2003 SHEET: 2 OF 2 REV: 1.0 SIZE: A3
ICARUS 07748 766447