hello everyone!!
I am reading the book "CMOS Cascade Sigma-Delta Modulators for Sensors and Telecom: Error Analysis and Practical Design (Analog Circuits and Signal Processing)
Rocío Río Fernández (Author), Fernando Medeiro Hidalgo (Author), Belén Pérez Verdú (Author), José Manuel Rosa Utrera (Author), Ángel Rodríguez-Vázquez (Author) "

I am trying to simulate a sigma delta adc(single loop, first order, 3 bit internal quantizer) based on pulse density modulation.
The book has a figure for the output of such a modulator(fig is attateched) on page 35.




Can anybody help me with the block diagram in simulink to obtain such an output.
I have simulated ΔΣ adc earlier, but the output waveform is similar to that of the delta modulator.