Patent ID: 9537582
Date: 2017-01-03
CPC Classifications: H04B

Claim:
1. A data transmission device, comprising: a coder configured to code data into a signal that has successive frequencies comprising a first frequency and a second frequency different from the first frequency; a first array of vibrating membrane ultrasonic transducers with a vibrating membrane, disposed on a first surface of a wafer, the first array configured to convert the signal into a acoustic signal propagating in the wafer, the acoustic signal having successive frequencies comprising the first frequency and the second frequency; a controller configured to control a D.C. voltage applied to the first array of vibrating membrane ultrasonic transducers, wherein the controller is configured to successively apply a first D.C. voltage and a second D.C. voltage different from the first D.C. voltage to a plurality of cells of the first array, wherein the plurality of cells is used for transmission of the first frequency and the second frequency; and a second array of vibrating membrane ultrasonic transducers disposed on a second surface of the wafer opposing the first surface, the second array comprising at least two assemblies of vibrating membrane ultrasonic transducers, a first assembly of the at least two assemblies having a resonance frequency equal to the first frequency and a second assembly of the at least two assemblies having a resonance frequency equal to the second frequency.