利用输入信号电平移位的自适应相关多重采样

• Format: Patent
• Language: Chinese
• Published: 20.09.2024
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

一种单斜率模数转换器(single slope analog to digital converter，SS-ADC)，包括：电平移位器，用于响应于用于逐步比较模拟输入与斜坡信号的比较器的输出，在复位电平和信号电平的相应AD转换的周期内向所述模拟输入添加一个或多个偏移电平；计数器，用于针对具有每个偏移电平的所述信号电平的所述AD转换的每个计数值，相应地测量所述计数值与具有相同偏移电平设置的所述复位电平的所述AD转换的计数值之间的差值；以及控制器，用于对成功输出所述AD转换结果的所述计数器的输出取平均值。所述转换器在不增加转换时间的情况下降低了时间噪声。 A Single Slope Analog to Digital converter (SS-ADC) includes: a level shifter for adding one or more levels of offsets to analog input during periods for respective AD conversions of a reset level and a signal level, in response to output of a comparator for comparing the analog input with a ramp signal step by step, and a counter for measuring, for each count value of the AD conversion of the signal level with each offset level, a difference between said count value and count value of the AD conversion of the reset level with the same offset level setting, respectively, and a controller for averaging over outputs of the counters which output the AD conversion results successfully. The converter achieves a reduction of temporal noise