阅读说明：本技术 具有极窄带通数字滤波的模数转换电路 (Analog-to-digital conversion circuit with very narrow bandpass digital filtering ) 是由 G·H·麦克吉布尼 P·T·格雷 G·D·莫里森 D·K·凡·奥斯特兰德 于 2020-03-23 设计创作，主要内容包括：模数转换电路包括模数转换器(ADC)电路,其可操作以将具有振荡频率的模拟信号转换为具有第一数据速率频率的第一数字信号,其中所述模拟信号包括一组纯音分量。ADC电路还包括数字抽取滤波电路,可操作以将第一数字信号转换为具有第二数据速率频率的第二数字信号。ADC电路还包括数字带通滤波器电路,可操作以将第二数字信号转换成具有第三数据速率频率的出站数字信号。数字带通滤波器电路被设置为产生带通区域,该带通区域的带宽被调谐以对所需纯音进行滤波。ADC电路还包括可操作以计算多个系数的系数处理器和可操作以选择所需纯音的处理模块。(The analog-to-digital conversion circuit includes an analog-to-digital converter (ADC) circuit operable to convert an analog signal having an oscillation frequency to a first digital signal having a first data rate frequency, wherein the analog signal includes a set of pure tone components. The ADC circuit also includes a digital decimation filtering circuit operable to convert the first digital signal to a second digital signal having a second data rate frequency. The ADC circuit also includes a digital band-pass filter circuit operable to convert the second digital signal to an outbound digital signal having a third data rate frequency. The digital band pass filter circuit is arranged to produce a band pass region having a bandwidth tuned to filter the desired pure tone. The ADC circuit also includes a coefficient processor operable to calculate a plurality of coefficients and a processing module operable to select a desired pure tone.)