| 摘要 |
A feedback control circuit capable of suppressing howl arising due to feedback from a sound generator such as a loudspeaker, comprising an amplifying transistor (TR1) and a second transistor (TR2) receiving a filtered feedback signal deriving from the output side of the sound generator, the two transistors being coupled so that a substantially constant frequency feedback very rapidly reduces the gain of the amplifying transistor substantially to zero. |
