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Old 8th April 2005, 05:54 AM   #1
Fossil is offline Fossil  Singapore
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Location: SG
Default TDA7293 - Need help on circuit

Hi All!

I found the following circuit at

It is quite similar to the one which was published in UB electronics some time back.

Can someone explain the function of the caps/resistor network between Pin 2 & 14. The recommended circuit has only 1 resistor between those pins.

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File Type: pdf tda 7293 es7293-100.pdf (42.5 KB, 153 views)
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Old 9th April 2005, 05:24 AM   #2
wxn is offline wxn  Lithuania
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100u caps are there to set DC gain to 1
R103 - feedback resistor
C3 prevents oscillation
C1 bypasses 100u caps
R1 - don't know for sure
R102 - gain setting resistor
Nothing is as simple as it seems
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Old 9th April 2005, 09:51 AM   #3
boholm is offline boholm  Denmark
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Location: Copenhagen
It is a filter. It cuts away frequencies out of the audio band ( 20 Hz - 20 kHz).
Best regards
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