Design Exploration and Performance Strategies towards Power-Efficient FPGA-Based Architectures for Sound Source Localization

Figure 4

Examples of PDM demodulators: (a) is the internal block diagram of the digital I²S MEMS microphone SPH0645LM4H from Knowles [29]. (b) is the internal block diagram of the digital I²S MEMS microphone ICS-43434 from TDK InvenSense [30]. (c) is proposed for the Blackfin processor [19]. (d) is proposed in [14].

(a)

(b)

(c)

(d)