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Attenuators for Audio Signals (1)

Adjustable Via Jumpers

Attenuators for Audio Signals (1)
Attenuators for Audio Signals (1)
Audio measuring devices usually have an input level range in which they work optimally and generate only little harmonic distortion themselves. If the input amplitude is too high, the measurement results will be poor. This can be remedied by a switchable attenuator with a defined attenuation per stage.

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Materials

Component list

Component List for Jumper Version

Resistors:

Unless otherwise specified:

MELF 0204 or thin-film SMD 1206, 1%

R1…R5, R11…R15 = 10 kΩ

R10, R20 = 1 kΩ

R6, R8, R17, R19 = 2.7 kΩ

R7, R9, R16, R18 = 33 kΩ

 

Capacitors:

C1, C2 = 22 µF / 25 V, tantalum, SMC-B

 

Semiconductors:

D1, D2 = BAV199, SOT23

 

Miscellaneous:

JP1, JP5 = 4-pin header, 1/10″ pitch

JP2, JP3 = 2 × 5-pin header, 1/10″ pitch

JP4 = 2 × 3-pin header, 1/10″ pitch‘

JP6 = 3-pin header, 1/10″ pitch

Circuit board 240176-01

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