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飞利浦公司生产的TDA1514高性能功放,以其优异的品质得到广泛的好评。但此电路采用双电源供电,对于目前大多数音响爱好者来说,要想摩机首先遇到的问题是更换主电源变压器。可是往往主电源变压器又含有辅助电源,为了保持原有功能,必须重新增加一只双电源变压器,或者重新定制一只保留原辅助电源又含有双电源绕组的变压器。本文介绍一种既解决了上述问题而其性能又可以与TDA1514媲美的功放,这就是不太为人们所熟悉的20W高保真TDA1520集成功放电路。该电路具有如下特点: (1)单电源供电,电源适用范围宽(15～50V);(2)低噪声、低失真THD=0.01％(P_o=16W,V_C=32);(3)动态范
Philips TDA1514 high-performance amplifier produced by its excellent quality has been widely praised. However, this circuit uses dual power supply, for most current audio enthusiasts, the first problem is to change the main power machine to replace the main power transformer. But often the main power transformer and auxiliary power supply, in order to maintain the original function, you must re-add a dual power transformer, or re-custom to retain the original auxiliary power supply also contains a double power transformer winding. This article describes an amplifier that solves the problem described above and delivers the same performance as the TDA1514, which is less well-known 20W high-fidelity TDA1520 integrated amplifier. The circuit has the following characteristics: (1) a single power supply, the power supply is wide (15 ~ 50V); (2) low noise, low distortion THD = 0.01% (P_o = 16W, V_C = 32);