Patent ID: 7525398

Claim:
A system for communicating a data signal across an electrical isolation barrier, the system comprising: a modulator operable to modulate a carrier signal having a frequency in an operating frequency range in response to an input data signal; an integrated acoustic data coupler comprising an acoustically resonant structure having at least one acoustic resonant frequency in the operating frequency range, the acoustically resonant structure comprising: a first thin film electro-acoustic transducer electrically coupled to an output of the modulator to receive the modulated carrier signal, a second thin film electro-acoustic transducer, and a substrate for acoustically coupling and providing an electrical isolation barrier between the first and second thin film electro-acoustic transducers; and a demodulator operable to generate an output data signal from a signal received from the second thin film electro-acoustic transducer, wherein the integrated acoustic data coupler draws a current of at most 10 mA when 1,000 V is applied across the integrated acoustic data coupler.