Bosch Service Manual and Diagrams for Subaru Car Stereo repair and tune up.
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The present invention relates to an adaptive echo canceling circuit and, more particularly, to an adaptive echo canceling circuit which is capable of canceling an echo in the reproduced sound of a video disk player.
A conventional echo canceling circuit is disclosed in Japanese Patent Laid-Open No. 59-5092.
In an echo canceling circuit, an echo is detected in an echo canceller, and an error signal which is generated on the basis of the detected echo is fed back to an error feedback circuit so that the echo can be canceled by using the error signal.
However, in the echo canceling circuit disclosed in Japanese Patent Laid-Open No. 59-5092, when the gain of the error feedback circuit is increased, if an echo is strong, the level of the feedback signal is increased, resulting in that the performance of the echo canceller is deteriorated.
On the contrary, if the gain of the error feedback circuit is decreased, if an echo is weak, the level of the feedback signal is decreased, resulting in that the performance of the echo canceller is lowered.Gold is the standard in investment ac619d1d87
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