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![Page 1: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/1.jpg)
27
-
+
10k1k
10
0k
0.22uF
In
Out
50
k
R3 R4
R1
R2
R5*
C1
U1
OPA132
2
3
7
4
6
V+
V-
CMoy standard
[Rainer Boettchers, 2003, [email protected]]
v =R3 + R4
R3 =
R4
R31 +
*) R5 opt., 27 .. 47Ohm
Cmoy headphone amplifier (© Chu Moy, www.headwize.com)
OPA132-pin compatible: LM741 (lower Vcc, lower P0)OPA2132-pin compatible: TL072C, NE5532 (higher Out-Z)
Rin = R2
![Page 2: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/2.jpg)
27
-
+
10k1k
10
0k
0.22uF
In
Out
50
kR3 R4
R1
R2
R5
C1
U1
OPA132
2
3
7
4
1
V+
V-
CMoy 47 design
[Rainer Boettchers, 2003, [email protected]]
U2
OPA132
3
2
7
4
1
V+
V-
-
+
27
Cmoy47 headphone amplifier (© Chu Moy/Apheared, www.headwize.com)
![Page 3: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/3.jpg)
47
-
+
1M
In
Out
R2
R5U1
OPA132
2
3
7
4
6
V+
V-
Simple impedance follower
pin-compatible opamp: TL072C (lower quiescent current)
Impedance follower
[Rainer Boettchers, 2003, [email protected]]
![Page 4: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/4.jpg)
27
-
+
10k1k
10
0k
0.22uFLineInR
Out
10
0k
R3 R4
R1
R2
R5*
C1
U1/1
OPA132
2
3
7
4
1
V+
V-100k
27
-
+
10k1k
10
0k
0.22uFLineInL
Out1
00
k
R3 R4
R1
R2
R5*
C1
U1/2
OPA132
6
5
7
4
7
V+
V-100k
-
+
-
+
100k
100k
2.2k1k
4.7k
1k
TL072C
TL072C
U2/1
7
4
V+
V-
10
k
7
4
V+
V-
U2/2
0.2
2u
F
InstrIn
1M
2
3
1
6
5
7
Practice amp w/ LineIn & Instr (var. Line-In)
R6
R7
0.47uF
R8
1M
![Page 5: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/5.jpg)
27
-
+
10k1k
10
0k
0.22uFLineInR
Out
R3 R4
R2
R5*
C1
U1/1
OPA132
2
3
7
4
1
V+
V-47k
27
-
+
10k1k
10
0k
0.22uF
LineInLOut
R3 R4
R2
R5*
C1
U1/2
OPA132
6
5
7
4
7
V+
V-
47k
-
+
-
+
100k
100k
2.2k1k
4.7k
1k
TL072C
TL072C
U2/1
7
4
V+
V-
10
k
7
4
V+
V-
U2/2
0.2
2u
F
InstrIn
1M
2
3
1
6
5
7
Practice amp w/ LineIn & Instr (const. Line-In)
R6
R7
0.47uF
R8
1M
![Page 6: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/6.jpg)
Battery common rail supply
47
0u
F
4.7
k
+
47
0u
F+
4.7
k
3.3
k
+9V
-9V
2 x 9V
LED
![Page 7: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/7.jpg)
27
-
+
620k470k
10
k
0.47uIn
Out
R3 R4
R2
R5*
C1
U1
OPA132
2
3
7
4
6
V+
V-
g =R4
R3
*) R5 opt., 27 .. 47Ohm
10
k
Single supply operation
[Rainer Boettchers, 2003, [email protected]]
Single supply operation for buffer amp
Rin = R3
10
0u+
220p0
.22
u+
![Page 8: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/8.jpg)
Musical EQ
![Page 9: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/9.jpg)
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OpAmp audio projects
Date: 18 April 2023 12:05Page: 9
0
0Out A
Out B
In A
In B
Vcc+Vcc -
Gnd
27
2710k
10k
0.22u
0.22u
4.7u 100k
100k1k 1k
OPA2132
[Rainer Boettchers, 2003, [email protected]]
4.7u
7812
7912
4700u4700u
+ +
+- +-
B80C1500 B80C1500
~ ~ ~ ~
15V~ 15V~
CMoy standard, power supply version
![Page 10: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/10.jpg)
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OpAmp audio projects
Date: 18 April 2023 12:05Page: 10
0
0Out A
Out B
In A
In B
Vcc+
Vcc -
Gnd
47
47
1M
1M
OPA2132
[Rainer Boettchers, 2003, [email protected]]
47u47u
+ +
Pickup follower
10k10k
![Page 11: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/11.jpg)
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OpAmp audio projects
Date: 18 April 2023 12:05Page: 11
0
0
Out A
Out B
In A
In B
Vcc+Vcc -
Gnd
27
2710k
10k
0.22u
0.22u
4.7u
100k
100k1k 1k
OPA2132
[Rainer Boettchers, 2003, [email protected]]
4.7u
7812
7912
4700u4700u
+ +
+- +-
B80C1500 B80C1500
~ ~ ~ ~
15V~ 15V~
OPA2132
2727
CMoy 47, power supply version
![Page 12: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/12.jpg)
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OpAmp audio projects
Date: 18 April 2023 12:05Page: 12
0
0
Out A
Out B
In A
In B
Vcc+Vcc -
Gnd
27
2710k
10k
0.22u
0.22u
220k
220k1k 1k
OPA2132
[Rainer Boettchers, 2003, [email protected]]
470u470u
+ +
OPA2132
2727
4.7k
4.7k
V+V-
CMoy 47, battery version
![Page 13: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/13.jpg)
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Date: 18 April 2023 12:05Page: 13
0
0
[Rainer Boettchers, 2003, [email protected]]
CMoy standard, battery version
Out A
Out B
In A
In B
Vcc+Vcc -
Gnd
27
2710k
10k
0.22u
0.22u
4.7k
100k 100k1k 1k
OPA2132
4.7k
470u/25V470u/25V
+ +
Out A
Out B
In A
In B
Vcc+ Vcc -
Gnd
27
27 10k
10k
0.22u
0.22u
4.7k
100k100k 1k1k
OPA2132
4.7k
470u/25V 470u/25V
++
Components side view
Print side view
![Page 14: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/14.jpg)
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OpAmp audio projects
Date: 18 April 2023 12:05Page: 14
0
0
[Rainer Boettchers, 2003, [email protected]]
CMoy standard, battery version (alternate layout)
![Page 15: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/15.jpg)
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Date: 18 April 2023 12:05Page: 15
0
0
[Rainer Boettchers, 2003, [email protected]]
CMoy booster, low power battery version
Out A
Out B
In A
In B
Vcc+Vcc -
Gnd
27
27R3
R3
0.22u
0.22u
10k
100k 100k1k 1k
OPA2132
10k
100u/16V
100u/16V
++
R3 gain
4.7k 5.7
2.7k 3.7
1.0k 2.0
Components side view
Print side view
Out A
Out B
In A
In B
Vcc+Vcc -
Gnd
27
27 R3
R3
0.22u
0.22u
10k
100k100k 1k1k
OPA2132
10k
100u/16V
100u/16V
++
![Page 16: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/16.jpg)
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Date: 18 April 2023 12:05Page: 16
0
0
In N
Vcc+
TL072
[Rainer Boettchers, 2003, [email protected]]
Single supply pickup booster
10k
+
10u
27
680k
470k
10k
0.47u
10k
+
27
680k
0.47u470kIn B
10k
Gnd
10u
In N
Vcc+
TL072 10k +
10u
27
680k
470k
10k
0.47u
10k
+
27
680k
0.47u 470kIn B
10k
Gnd
10u
Components side view
Print side view
![Page 17: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/17.jpg)
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OpAmp audio projects
Date: 18 April 2023 12:05Page: 17
0
0
[Rainer Boettchers, 2003, [email protected]]
CMoy practice amp, battery version, const. LineIn
Out A
Out B
In A
In B
Vcc+Vcc -
Gnd
27
2710k
10k
0.22u 0.22u
4.7k
47k
100k1k 1k
OPA2132
4.7k
470u/25V470u/25V
+ +
Main stage
Preamp stage
Instr
0.22u
1M
TL072C
Gnd
1k
4.7k
1k
2.2k
Pre out
Vcc+
Vcc -
Instr. vol.
Gnd
Put feedback resistors on solder pins to adapt gain to instrument output level
Comments:
May be 10 ... 100k pots; if > 100k put 10k across
100k
100k
Pre In
Pre In
47k
100k
0.47u
1M
![Page 18: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/18.jpg)
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Date: 18 April 2023 12:05Page: 18
0
0
Out A
Out BIn A
In B
Vcc+
Vcc -
Gnd
27
2710k
10k
0.22u
0.22u
4.7k
100k100k1k 1k
OPA2132
4.7k
470u470u
+
+
[Rainer Boettchers, 2003, [email protected]]
CMoy standard, battery version, single board
InputHeadphone
Volume
![Page 19: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/19.jpg)
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OpAmp audio projects
Date: 18 April 2023 12:05Page: 19
0
0
Out A
Out BIn A
In B
Vcc+Vcc -
Gnd
27
2710k
10k
0.22u
0.22u
4.7k
100k 100k
OPA2132
[Rainer Boettchers, 2003, [email protected]]
4.7k
470u470u
+ +
CMoy standard, switchable gain, battery version
470 1k 2.2k 4.7k 470 1k 2.2k 4.7k
1: g = 222: g = 113: g = 64: g = 3and more
1 4 1 4
![Page 20: 27 - + 10k 1k 100k 0.22uF In Out 50k R3R4 R1 R2 R5* C1 U1 OPA132 2 3 7 4 6 V+ V- CMoy standard [Rainer Boettchers, 2003, rainer@justchords.com] v = R3](https://reader043.pdfslide.us/reader043/viewer/2022032516/56649c785503460f9492d0f6/html5/page/20.jpg)
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Date: 18 April 2023 12:05Page: 20
0
0
[Rainer Boettchers, 2003, [email protected]]
Equalizer EQ3
In
Vcc-
1u
Gnd
Components side view
TL072 Vcc+
Out
220k
220k
1u1.8k
3.6k
11k
500k
1.8k
5n
3.6k
5n
22n
50n
11k
11k
100k
100k
