LOSS COMPENSATING CIRCUIT,申请号JP19790063470-传众专利搜索

LOSS COMPENSATING CIRCUIT

申请公布号：JPS55154837(A)

申请号：JP19790063470

申请日期：1979.05.22

申请公布日期：1980.12.02

申请人：

NIPPON ELECTRIC CO

发明人：RUIKE MASAHARU

分类号：H04B3/04;H04M1/76

主分类号：H04B3/04

摘要：PURPOSE:To make it easy to compensate a loss by nearly equalizing the positive feedback rate of an audio transmitter to its negative feedback rate and by adjusting inversion-side input impedance in case of many loads. CONSTITUTION:Between uninverted input terminal 15 and earth terminal 16 of operational amplifier 10, signal source 13 with internal impedance 12 and load impedance 14 are connected and between the inverted input terminal and earth terminal 16, inverted input impedance elements 18 and 21 are connected. Further, negative feedback impedance 17 between the output side of power amplifier 11 and the inverted input terminal of amplifier 10 and positive feedback impedance 20 between output terminal 19 of amplifier 11 and the uninverted input terminal of amplifier 10 are both provided to constitute an audio transmitter. Then, positive feedback and negative feedback in case that many signal sources 13 are connected are held constant at any time by adjusting inverted input impedance elements 18 and 21 corresponding to negative feedback impedance 17, so that a loss due to load impedance will effectively be compensated.