我们将叙述具有双信道音量,音调和均衡控制功能的单块集成电路。这个集成电路封装在一个16条脚的双列直插式管壳内。它只要很少的外部元件。在这种集成电路中,总的调谐波失真小于0.2％,而且信号与噪声的比率(S/N)大于57dB,(输入电平有效值在300mV时)。 对于单块集成电路技术来说,音调和音量的控制是一些最困难的功能集成。因为在具有宽的动态范围的情况下要实现可变增益放大器是比较困难地。音调控制功能要有复杂的频率控制能力。在分立元件电路中,这个功能可以由大量的无源元件来实现。 We will describe a monolithic integrated circuit with dual channel volume, tone and equalization control. The IC is packaged in a 16-pin dual in-line package. It requires few external components. In this integrated circuit, the total harmonic distortion is less than 0.2%, and the signal to noise ratio (S / N) is greater than 57dB (input level RMS at 300mV). Tone and volume control are some of the most difficult feature integrations for monolithic IC technology. Because it is more difficult to achieve a variable gain amplifier with a wide dynamic range. Tone control functions have complex frequency control. In the discrete component circuit, this function can be achieved by a large number of passive components.