sigma delta digital filter circuit implementation

[qslazio]

Hello everybody , i'm newbie to this subject.
After reading some material and papers, I still wondering that when implementing the modulator as well as the decimation filter in circuit stage, should we either use discrete time approach(using switch cap method) or some latch( flip-flop ) based style? Plz tell me in detail! Could you give me some materail particularly in circuit implementation.

Thanks a lot!

 

[borodenkov]

The modulator can be either descrete-time (switched-cap) or continuous-time (e.g gm-C) or even both (some stages descrete, some continuous).

The decimation filter is a digital circuit, that means FFs and logic.