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BA7760F Folha de dados(PDF) 4 Page - Rohm |
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BA7760F Folha de dados(HTML) 4 Page - Rohm |
4 / 6 page 4 Multimedia ICs BA7760 / BA7760F •Measurement circuit + – MIX BF 8 9 10 11 12 13 14 1 2 3 4 5 6 7 –+ – + + 4.7 µF 5k Ω 2.2k Ω 220 Ω + 4.7 µF 2.2k Ω 22 µF + + + 220 Ω 2.2k Ω 4.7 µF + + + 10k Ω 5k Ω 10 µF 470 µF 47 µF 470 µF 47 µF BA7760 / F Fig. 2 •Circuit operation (Refer to “Application Example”) The BA7760 and BA7760F are dual microphone ampli- fiers. The audio signals from the microphones are input to pins 3 and 12. The gain at this time is determined by attached resistors R3 / R4 and R6 / R7. By attaching capacitors to pins 5 and 10, the microphone amplifiers can be given frequency characteristics like those shown below. (Note: The attached component numbers are those used in “Application Example.”) 60dB 40dB 20dB 0dB – 20dB 1kHz 10kHz 100kHz 1MHz 10MHz 100MHz C = 150pF C = 0 36 1 1 6 3 1 6 31 6 31 6 3 180 ° 0 ° – 180 ° FREQUENCY : f (Hz) Characteristics when using standard components and standard constants Fig. 3 Microphone amplifier frequency characteristics |
Nº de peça semelhante - BA7760F |
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Descrição semelhante - BA7760F |
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