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BA3708F Datasheet(PDF) 4 Page - Rohm |
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BA3708F Datasheet(HTML) 4 Page - Rohm |
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4 / 8 page  741 Audio ICs BA3708F FCircuit operation (1) Input amplifier The input amplifier is a PNP differential amplifier, and the input pin (Pin 3) must be directly connected to ground through a 10k Ω or less bias resistor (RIN). If RIN is too large, an input offset may occur and operation will be- come unstable. The gain and frequency characteristics of the amplifier are determined by CIN and RIN connected to the input pin (Pin 3), and CNF and RNF connected to the NFB pin (Pin 4). (Figure 3) (2) Timing An output pulse of width TW is generated from the output pin (Pin 7) after the pulse delay time TD which begins when the input signal ends. The values of TD and TW are determined by the RC time constants of Pin 2 and Pin 1. TD (ms) 1.7 CD ( µF) RD (kΩ) TW (ms) 1.6 CW ( µF) RW (kΩ) |
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