Patent ID: 7839605

Claim:
An electrical signal processing device, comprising: at least one pair of input leads for inputting an input signal; at least one pair of output leads for outputting an output signal; a thin film magnetic circuit including at least one thin film flux generator for generating a flux signal in said magnetic circuit in response to said input signal and at least one thin film magnetoresistive sensor magnetically coupled through said magnetic circuit to said flux generator for receiving said flux signal and producing an output signal in response to said flux signal; wherein each flux generator includes at least one thin film conductive induction line threading said magnetic circuit, said induction line being formed in a thin film layer of said flux generator, and connected to at least one lead of said pair of thin film input leads; a thin film yoke including a yoke portion having at least one pair of thin film pole tips, wherein a gap having end surfaces on opposite sides of said gap is disposed between each said pair of pole tips; wherein a thin film magnetoresistive sensor is disposed in each gap proximate to ends of said pole tips from which flux emanates when the flux generator is generating flux, wherein each lead of said pair of output leads is connected to an opposite second side of said sensor, wherein said pole tips of said yoke are fabricated with end surfaces that are generally perpendicular to said planar sensor layers of said magnetoresistive sensor, wherein an electrically insulating portion of said gap is formed between said magnetoresistive sensor and one of said end surfaces of one of said pole tips.