Signal processing device using magnetic film and signal processing method

A signal processing device comprising:

• a continuous film containing at least one magnetic layer;
• a plurality of spin wave generators which are provided on the continuous film in such a manner as to be in direct contact with the continuous film or be in contact with the continuous film while having an insulation layer interposed therebetween, each of which has a contact surface with the continuous film in a dot shape;
• and
• at least one signal detector which is provided on the continuous film,
• wherein
• at least two of the plurality of spin wave generators and the signal detector are arranged to satisfy a relation of
• |cos(kjdj−ωj(tD−tj))−cos(kidi−ωi(tD−ti))|<2;
• and
• wherein
• dj is a shortest distance from a center of gravity of the j-th spin wave generator to the signal detector;
• kj is a wavenumber of a spin wave traveling from the j-th spin wave generator to the signal detector;
• ωj is an oscillation frequency of the spin wave generated from the j-th spin wave generator;
• tj is a time of signal input to the j-th spin wave generator;
• di (i≠j) is the shortest distance from a center of gravity of the i-th spin wave generator to the signal detector;
• ki is a wavenumber of a spin wave traveling from the i-th spin wave generator to the signal detector;
• ωi is an oscillation frequency of the spin wave generated from the i-th spin wave generator;
• ti is a time of signal input to the i-th spin wave generator;
• and
• tD is a time of signal detection in the signal detector.

A signal processing method of a signal processing device, the signal processing device comprising:

• a continuous film including at least one magnetic layer;
• first and second spin wave generators which are provided on the continuous film in such a manner as to be in direct contact with the continuous film or be in contact with the continuous film via an insulation layer interposed therebetween, and each of which has a contact surface with the continuous film in a dot shape and generates a spin wave in a region of the magnetic layer of the continuous film by receiving an input signal, the region being immediately under the contact surface;
• and
• at least one signal detector which is provided on the continuous film and detects, as an electrical signal, the spin waves generated by the spin wave generators and propagating through the continuous film, wherein
• a straight line between the first and second spin wave generators and a straight line between the first spin wave generator and the at least one signal detector are on the continuous film, and
• a straight line between the first spin wave generator and the at least one signal detector and a straight line between the second spin wave generator and the at least one signal detector are non-overlapping,
• the method comprising:
• making polarity of a current or a voltage to be inputted as an input signal to each of the spin wave generators correspond to any one of 0 and 1 of the input signal;
• and
• setting intensity of a detection signal detected by the signal detector to a signal output.

A signal processing method of a signal processing device, the signal processing device comprising:

• a continuous film including at least one magnetic layer;
• first and second spin wave generators which are provided on the continuous film in such a manner as to be in direct contact with the continuous film or be in contact with the continuous film via an insulation layer interposed therebetween, and each of which has a contact surface with the continuous film in a dot shape and generates a spin wave in a region of the magnetic layer of the continuous film by receiving an input signal, the region being immediately under the contact surface;
• and
• at least one signal detector which is provided on the continuous film and detects, as an electrical signal, the spin waves generated by the spin wave generators and propagating through the continuous film, wherein
• a straight line between the first and second spin wave generators and a straight line between the first spin wave generator and the at least one signal detector are on the continuous film, and
• a straight line between the first spin wave generator and the at least one signal detector and a straight line between the second spin wave generator and the at least one signal detector are non-overlapping,
• the method comprising:
• making any one of presence and absence of a voltage to be inputted as an input signal to each of the spin wave generators correspond to any one of 0 and 1 of the input signal;
• and
• setting intensity of a detection signal detected by the signal detector to a signal output.