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图1电路用于检测模拟信号峰值,该电路避免了以往峰值检测电路的弊端:有限的保持时间、检测性能对保持电容参数极为敏感、需要输入电阻极大的高速缓冲器等。另外,该电路在无需专用模/数转换器的前提下实现了模拟到数字的转换。
The circuit in Figure 1 detects the peak value of the analog signal. This circuit avoids the disadvantages of the previous peak detection circuit. The limited holding time and the detection performance are extremely sensitive to the parameters of the holding capacitor, and the input resistor needs a high-speed buffer. In addition, this circuit achieves analog-to-digital conversion without the need for a dedicated analog-to-digital converter.