поискавой системы для электроныых деталей |
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BA3528 датащи(PDF) 9 Page - Rohm |
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BA3528 датащи(HTML) 9 Page - Rohm |
9 / 14 page 3180 10–6 C1 = R1 )200)103 R2 = 2 R1 10–GVC/20 393 Audio ICs BA3528AFP / BA3529AFP FAttached components (1) Preamplifier If the closed-loop voltage gain (GVC) of the preamplifier is below 30dB for a frequency of f = 1kHz, oscillation may occur. (2) Playback equalizer terminal (NAB) The playback equalizer characteristics are determined by the RC circuit connected between the output and NF pins. For the circuit in Fig. 9, with a closed-loop voltage gain of GVC at an input frequency of 1 kHz, the relationships between the values of the RC circuit components are as follows: The equalizer can be switched on and off using the mute amplifier. If equalization for metal tape is added, deter- mine R3 as follows: R3 = 1.4 R1 (3) Pre-mute switching noise If you use the mute amplifier for pre-muting, the voltage difference between the pre-output and pin 22 will generate switching noise (a “pop” sound) when the mute is switched on and off. To reduce the DC gain and reduce this switching noise, we recommend that you connect a resistor (R = 51 k Ω) as shown in Fig. 10. This resistor reduces the gain of the circuit in the bass region of the playback equalizer as shown in the graph in Fig. 11. By using different combinations of component values for R1 and C1, it is possible to compensate for this effect in the low-frequency region as shown in the graph in Fig. 12. |
Аналогичный номер детали - BA3528 |
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Аналогичное описание - BA3528 |
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