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KA2425 Datasheet(PDF) 5 Page - Samsung semiconductor |
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KA2425 Datasheet(HTML) 5 Page - Samsung semiconductor |
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5 / 6 page ![]() KA2425A SPEECH NETWORK WITH DIALER INTERFACE TEST CIRCUIT Fig 2. DTMF Driver Test Fig 3. Transmit and sidetone level test Fig 4. AC Impedance, Receive and Sidetone Rejection Test 16 14 13 12 18 17 10 KA2425A V+ 22K V IN 400mVrms 1.0V 204 20 µF + I LOOP 2 4 7 8 14 15 17 KA2425A 150 Ω 20 µF 6 3 11 18 13 12 10 + V+ 150K 8.2K 503 33K 10K 20mVrms 1KHz Vs Microphone Equivalent I LOOP 600 Ω 203 47 Ω 10 204 150 Ω 503 2 4 7 8 14 15 17 KA2425A 6 3 11 18 13 12 10 V+ 150K 8.2K 503 33K 47 Ω 10 204 150 Ω 503 + 20 µF I LOOP 203 20mVrms 1KHz Vs |
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