Dc component regenerating circuit

Abstract

Abstract PURPOSE:To form a DC component regenerating circuit by means of the quantization feedback method ease of circuit integration operated stably even if dropout occurs by using a digital signal being an output of an identification circuit so as to detect an abnormal and avoiding the quantization feedback at the period of abnormal detection. CONSTITUTION:An abnormal detection circuit 31 inputs a digital signal being an output of the identification circuit 13 and acts like detecting a period when a larger inverting interval continues more than the maximum inverting interval decided by the modulation system, controlling the switching of a switch circuit 32 inserted between the identification circuit 13 and a low pass filter 15 and disconnecting the quantization feedback circuit at abnormal time. Thus, even if the inverting interval longer than the maximum inverting interval of the modulation system continues because of dropout or the like, the DC component regenerating circuit by the quantization feedback method is made inactivated so as to quicken the restoration of the DC component regenerating circuit after dropout and the instability at dropout to the normal operating state.

Inventors

• 👤 Masaaki Kato
• 👤 正昭 加藤

Bibliographic Details