桥式放大器CATV中继线电缆中安放的一种放大器，用于馈接分支电缆。

Bridge amplifier an amplifier installed on a CATV trunk cable to feed branching cables.

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同时，在相同的电源电压下，BTL输出信号摆幅是半桥式放大器的2倍，因为负载是差分驱动的。

With the same supply voltage, the BTL signal output range is 2 times of Half-bridge amplifier due to the load with differential drive.

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双回转机构的步进电机控制电路由TDA1521音频集成功率放大器组成平衡桥式功率驱动电路，由计算机并行口经过锁存器构成脉冲分配器。

To control stepping motors, the balance bridge power drive circuit is made up by TDA1521 integrated audio power amplifier, the pulse allotter is made up by the parallel ports of computer and latches.

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