SLUSDQ4 April 2019 BQ79606A-Q1
The modulator has a functional block diagram as shown in Figure 5 . The Delta Sigma used is a second order modulator and consists of a difference amplifier, the "Delta," and an integrator, the "Sigma," followed by a second difference amplifier and integrator. The output of the second integrator is the input to a comparator that produces a pulse train with the density of pulses proportional to the voltage at the input. This pulse train is converted back to a voltage through the 1-bit DAC to be fed into the Delta stages.