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Delta-sigma DAC, basic questions and simulation in Simulink

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CHL

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Hello

I have some queries about delta-sigma DAC.

1) basically, it is same with delta-sigma ADC, but it consists of digital blocks, such as accumulators. However, how to synchronize the clock with PCM signals from a DSP? Does it need serial communication circuits?

2) I tried to find Simulink simulation example, but there are only ADC examples. Although I simulated simple blocks by myself, there is an error. The input sine wave is converted to PCM signal and the PCM signal goes to delta-sigma DAC. Can you show me an Simulink simulation example?
dac.png

3) Are there any books or papers which explain delta-sigma DAC circuits specifically? I already checked "Understanding delta-sigma data converters(R. Schreier et al)" and "Delta-sigma data converters - Theroy, design, and simulation (S.R. Norsworthy et al), but the books just show blocks. They focus on ADC parts.
 

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