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本文将要讨论多路专用积分电容器,用于单片运算放大器以及二级MOS开关电容滤波器组设计方面。比起较早的方法来说,在几个滤波器频道中,两个运算放大器的组合使用,减小了功率和面积,而且增加了集成电路设计的(?)木性。这种技术具有直接的语言处理过程,如自动语言合成器(音码器)以及识别语言/说话者的预处理器。 用四个二级滤波器组成的模拟实验板已经制成,并作了试验。目前已制成的芯片包括20个二级滤波器,面积2.5mm~2。只需要两个运算放大器,而且功耗小于25mw。
This article will discuss multi-channel dedicated integrating capacitors for monolithic op amps and secondary MOS switched capacitor filter bank design. Compared to earlier approaches, the combination of two op amps in several filter channels reduces power and area, and increases the (?) Woodiness of the integrated circuit design. This technique has direct language processing, such as automatic speech synthesizer (vocoder) and speech recognition / speaker preprocessor. A simulation experiment board with four secondary filters has been made and tested. At present, the chip has been made, including 20 secondary filters, an area of 2.5mm ~ 2. Only two op amps are needed and consume less than 25mW.