FPGA Implementation of an Amplitude-Modulated Continuous-Wave Ultrasonic Ranger Using Restructured Phase-Locking Scheme

<table>(a) Schematic of the proposed Ultrasonic Range Finder and (b) IR reference signal, transmitted ultrasonic signal, and received ultrasonic signal.</table>

VLSI Design

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Figure 1

Figure 1: FPGA Implementation of an Amplitude-Modulated Continuous-Wave Ultrasonic Ranger Using Restructured Phase-Locking Scheme 