Patent ID: 7586392

Claim:
A data coupler, comprising: a first acoustic isolation transformer operable to develop a first isolated output signal in response to a first modulated input signal; a second acoustic isolation transformer operable to develop a second isolated output signal in response to a second modulated input signal; a first transmitter coupled to the first acoustic isolation transformer and adapted to receive a first data input signal, the first transmitter operable to generate the first modulated input signal in response to the first data input signal; a second transmitter coupled to the second acoustic isolation transformer and adapted to receive a second data input signal that is the complement of the first data input signal, the second transmitter operable to generate the second modulated input signal in response to the second data input signal; a first receiver coupled to the first acoustic isolation transformer to receive the first isolated output signal and operable to generate a first demodulated signal responsive to the first isolated output signal; and a second receiver coupled to the second acoustic isolation transformer to receive the second isolated output signal and operable to generate a second demodulated signal responsive to the second isolated output signal; and an output decision circuit coupled to the first and second receivers to receive the first and second data output signals, the output decision circuit operable to generate a data output signal responsive to the first and second demodulated signals.