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BA3853BFS Folha de dados(PDF) 9 Page - Rohm |
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BA3853BFS Folha de dados(HTML) 9 Page - Rohm |
9 / 11 page 799 Audio ICs BA3853BFS FExternal components (1) Mute and loudness circuit components Select the values for the mute and loudness on / off pin components to suit the product that you are designing. The value of the resistor should be 2.2M Ω or less. Set the circuit time constant as follows: When using a switch as illustrated in the circuit diagram, set the values for C and R in the time-constant circuit as follows: (1) When the switch is on (rise) (2) When the switch is off (fall) V: pin 3 or pin 4 voltage (2) External filter circuits The filter circuits are built using passive components, and the resistors for both the bass and treble filters are on the chip. Construct the circuits shown below. Filter cutoff frequencies The circuits given above have the following frequency characteristics. (1) Bass filter cutoff frequency (2) Treble filter cutoff frequency High-pass filter side Low-pass filter side The tone control circuit is designed to give a change of ±15dB (Typ.) for the frequency that you wish to boost or cut at the peak and bottom of the frequency characteris- tic. Design the filter with due consideration to the fre- quency characteristics. The values for the filter given in the application circuit have been selected to give suffi- cient boost and cut at f = 100Hz and f = 10kHz. V = Vreg EXP ( * t CR12 /(R1 )R2) ) V = Vreg (1 * EXP ( * t R1C2 )) fc1 = 1 2 πC1 20kΩ 1 2 πC1R1 = fc2 = 1 2 πC2 10kΩ 1 2 πC2R2 = fc3 = 1 2 πc3 100pF 20kΩ 1 2 πC3R3 = = 80kHz |
Nº de peça semelhante - BA3853BFS |
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Descrição semelhante - BA3853BFS |
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