Superconductive logic device

A logic circuit comprising:

• a film formed of a superconductive body made of a ceramic superconductive material which has a critical temperature and grain boundaries which act as weak couplings, said superconductive body capable of passing from a resistance state of zero to a finite resistance state;
• said film superconductive body being formed of two separate portions on an insulated substrate connected in series with a lead located at each end of said body and a single lead located between and in contact with said portions, said superconductive body showing a magneto resistive property in accordance with a magnetic field applied thereto while keeping the superconductive body at a temperature near to the critical temperature thereof;
• a film conductor for applying a magnetic field to said superconductor body when a signal current si applied to said film conductor, said superconductive body functioning to generate an output voltage in response to said signal current;
• said film superconductive body with its two separate portions and leads forming an inverter circuit.

A logic circuit comprising:

• a film formed of a superconductive body made of a ceramic superconductive material which has a critical temperature and grain boundaries which act as weak couplings, said superconductive body capable of passing from a resistance state of zero to a finite resistance state, said film superconductive body being connectable to a power supply for applying a constant current to said superconductive body, said superconductive body showing a magneto-resistive property in accordance with a magnetic field applied thereto while keeping the superconductive body at a temperature near to the critical temperature thereof;
• at least one film conductor for applying a magnetic field to said film superconductive body when a signal current is applied to said at least one film conductor said film superconductive body functioning to generate an output voltage in response to said signal current;
• said film superconductive body and said at least one film conductor formed on a substrate made of an insulation material and said film superconductive body and said at least one film conductor being substantially parallel to each other and spaced from each other in a lateral direction on one surface of said substrate;
• and
• voltage detector electrodes electrically connected to and physically extending across said film superconductive body, said voltage detector electrodes for facilitating sensing a voltage drop across said film superconductive body;
• the grain boundaries of said superconductive material causing the voltage drop across said superconductive material to vary corresponding to varying signal current applied to said film conductor means;
• and
• wherein the voltage detector electrodes have a first and second portion, the first portion extending across the superconductive body and said second portion being substantially at a right angle to said first portion and extending parallel to and spaced from said superconductive body.

A logic circuit comprising:

• a film superconductive body made of a ceramic superconductive material which has a critical temperature and grain boundaries which act as weak couplings;
• said film superconductive body capable of passing from a resistant state of zero to a finite resistive state, said film superconductive body being connectable to a power source for applying a constant current to said film superconductor body said film superconductive body showing a magnetic resistive property in accordance with magnetic field applied thereto while keeping the film superconductive body at a critical temperature thereof;
• a first film conductor for applying a magnetic filed to said film superconductive body when a signal current is applied to said film conductor, said film conductor being only a signal substantially "U" shaped member completely crossing the film superconductive body, said film superconductor body and said first film conductor formed on an insulated substrate;
• and
• voltage detector electrodes electrically connected to and physically extending across said film superconductor body, said voltage detector electrodes for facilitating sensing a voltage drop across said superconductor body;
• the grain boundaries of said superconductor material causing the voltage to drop across said superconductor material corresponding to the varying signal currents applied to said first film conductor.

A logic circuit comprising:

• a film superconductive body made of a ceramic superconductive material which has a critical temperature and grain boundaries which act as weak couplings, said superconductive body capable of passing from a resistance state of zero to a finite resistance state, said superconductive body being connectable to a power supply for applying a constant current to said film superconductive body, said superconductive body showing a magneto resistive property in accordance with a magnetic field applied thereto while keeping the film superconductive body at a temperature near to the critical temperature thereof;
• there being only two film conductors for applying a magnetic field to said superconductive body when a signal current is applied to said to film conductors;
• said film superconductive body functioning to generate an output voltage in response to the signal current applied to the film conductors;
• the first of the film conductors being of U-shape and completely crossing the film superconductive body,
• the second film conductor being substantially linear except for a U-shape portion which is directly adjacent to said U-shaped film conductor, and
• voltage detector electrodes connected across said film superconductive body, said voltage detector electrodes for facilitating sensing a voltage drop across said superconductive body, the grain boundaries of the ceramic superconductor material causing the voltage drop across said superconductor material to vary corresponding to the varying signal currents applied to said first and second conductor films.

A logic device comprising:

• a film formed of a superconductive body made of a ceramic superconductive material which has a critical temperature and grain boundaries which act as weak couplings, said superconductive body capable of passing from a resistance state of zero to a finite resistance state, said superconductive body being connectable to a power supply for applying a constant current to said film superconductive body, said film superconductive body exhibiting a magneto resistive property when a magnetic filed is applied thereto while keeping the film superconductive body at a temperature near to the critical temperature thereof;
• only a single first film conductor of substantially U-shape crossing said film superconductive body for applying a magnetic field to said film body when a signal current is applied to said U-shaped conductor, said film conductor body functioning to generate an output response to the signal current applied to the U-shaped film conductor,
• a substantially linear film conductor for applying a magnetic field to said superconductive body when a signal current is applied to said second film conductor said film superconductive body functioning to generate an output voltage in response to a signal current applied to the second film conductor;
• said film superconductive body and each of said film conductors formed on a substrate;
• and
• voltage detector electrodes electrically connected to an extending across said film superconductive body said voltage detector electrodes for facilitating sensing a voltage drop across said superconductive body;
• and
• the grain boundaries of said superconductive material causing the voltage drop across said superconductive material to vary corresponding to a varying signal current supplied to said conductor films.