论文部分内容阅读
扩音系统中常用到二路均衡输出的放大电路做信号的传输分配用。通常,这种电路主要采用变压器来构成,但却存在着带宽限制和漏磁感应的缺点,而且代价也较高。本文介绍的电路仅使用二块运放电路便构成了一种简单高性能的音频均衡电路(见下图)。电路特点:两路均衡输出互不影响,即使一路对地短路,另一路仍能正常工作。电路输出阻抗为600欧姆。IC_1为NE5534,用作电路的输入级;IC_2为双运放NE 5533,它与反馈电阻R_2以及R,R_1组成两
PA system commonly used to two balanced output amplification circuit to do the signal transmission distribution. Usually, this kind of circuit is mainly composed of transformers, but it has the disadvantages of bandwidth limitation and leakage inductance, and the cost is also higher. This article describes the circuit using only two op amp circuit will constitute a simple high-performance audio equalization circuit (see below). Circuit Features: Two balanced output without affecting each other, even if all the way to short circuit, the other can still work properly. Circuit output impedance of 600 ohms. IC_1 is the NE5534, which is used as the input stage of the circuit. IC_2 is the dual op amp NE 5533, which is composed of a feedback resistor R_2 and R, R_1