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TEA7530FP 데이터시트(PDF) 5 Page - STMicroelectronics |
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TEA7530FP 데이터시트(HTML) 5 Page - STMicroelectronics |
5 / 11 page CIRCUIT DESCRIPTION TEA7530 is a 8 pin DIP integrated circuit provid- ing the following facilities: ♦ Loudspeakeramplifier ♦ Antidistortion feed-back system (limited line current compensation) 1.1. LOUDSPEAKER AMPLIFIER The amplifier is divided into 2 main sections. - Automatic Gain Control (AGC) - Push-pull amplifier (bridge structure) a) The AGC section is used for the antidistortion system. ♦When used in a telephone set to avoid larsen effect the AGC automatically decreases loud- speaker amplifier gain. ♦When the required output level exceeds the capabilities of the available current, the AGC decreases the loudspeaker amplifier gain to avoids distortion. b) The output amplifier uses a double push-pull configuration (H bridge) to get maximum dynamic range under limited supply conditions. Figure 9 Figure 10 TEA7530 5/11 |
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