| 摘要 |
<p>A continuous-time sigma-delta analog-to-digital converter includes a first integrator stage to integrate a difference between a first differential signal derived from a differential analog input signal and a second differential signal derived from a quantized output signal, a quantizer and a low pass filter. The first integrator stage has a differential operational amplifier, first, second, third, and fourth input resistors, and a first pair of integrating capacitors. The differential analog input signal is received at first and second input nodes of the converter. The first and third input resistors are coupled in series between the first input node and a first input of the operational amplifier. The second and fourth input resistors are coupled in series between the second input node and a second input of the operational amplifier. The first and second input resistors are coupled to the third and fourth input resistors, respectively.</p> |
