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TA2131FN データシート(PDF) 8 Page - Toshiba Semiconductor |
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TA2131FN データシート(HTML) 8 Page - Toshiba Semiconductor |
8 / 19 page TA2131FN 2002-04-19 8 <Principle of Low-Pass Compensation> The low-pass component alone is extracted from the composite signal of PWA/PWB output, and that frequency signal is fed back to PWA/PWB once more via the inversion amplifier, thereby making it possible to increase the gain only of the low-pass component. The frequency characteristics of the power amplifier output V (OUT) in this state are shown in Fig.4 (b). In practice they are the frequency characteristics (c) viewed from load terminal V (RL), and the low-pass is compensated relative to the state in (a). 2-2. Low-Pass Compensation Condenser and Crosstalk In this low-pass compensation condenser circuit, processing is carried out using the composite signal of power amplifier output, so this affects crosstalk, according to the amount of compensation. f characteristics and crosstalk generated by the capacity of the condenser for compensation (2-pin) are shown below. f (Hz) (b) (c) (a) 1 10 100 1 k 10 k 100 k 0 10 20 -20 -10 Figure 4 Power Amplifier Frequency Characteristics VCC1 = 2.8 V VCC2 = 1.2 V Rg = 620 W RL = 16 W Filter: LPF 80 kHz Output C = 220 mF 10 0 -10 10 30 100 300 1 k 3 k 10 k 30 k C = 0.47 mF C = 2.2 mF C = 1 mF Vref short f (Hz) Figure 5 Condenser and f Characteristics for Low-Pass Compensation |
同様の部品番号 - TA2131FN |
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同様の説明 - TA2131FN |
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