摘要:
Provided are a method and circuit for controlling heat generation of a power transistor, in which the power transistor can be protected by preventing heat generation of the power transistor by using a metal-insulator transition (MIT) device that can function as a fuse and can be semi-permanently used. The circuit for controlling heat generation of a transistor includes a metal-insulator transition (MIT) device in which abrupt MIT occurs at a predetermined critical temperature; and a power transistor connected to a driving device and controlling power-supply to the driving device, wherein the MIT device is attached to a surface or heating portion of the transistor and is connected to a base terminal or gate terminal of the transistor or a surrounding circuit from a circuit point of view, and wherein when a temperature of the transistor increases to a temperature equal to or greater than the predetermined critical temperature, the MIT device reduces or shuts off a current of the transistor so as to prevent heat generation of the transistor.
摘要:
Provided is a lithium secondary battery including a discharge unit capable of delaying or preventing a battery explosion. The lithium secondary battery includes a discharge unit disposed parallel to a battery body. The discharge unit includes a first electrode connected to a positive electrode of the battery body, a second electrode connected to a negative electrode of the battery body, and a discharge material film, disposed between the first electrode and the second electrode, inducing a abrupt discharge above a predetermined temperature. The discharge material film, e.g., a abrupt metal-insulator transition (MIT) material film can induce a abrupt discharge, thereby preventing or delaying a battery explosion.
摘要:
Provided are a memory device that undergoes no structural phase change, maintains a uniform thin film, and can perform a high-speed switching operation, and a method of operating the same. The memory device includes a substrate, an abrupt MIT material layer, and a plurality of electrodes. The abrupt MIT material layer is disposed on the substrate and undergoes an abrupt metal-insulator transition by an energy change between electrons. The plurality of electrodes are brought into contact with the abrupt MIT material layer and are melted by heat to form a conductive path on the abrupt MIT material layer.
摘要:
Provided are an electrical and/or electronic system protecting circuit using an abrupt metal-insulator transition (MIT) device which can effectively remove high-frequency noise with a voltage greater than a rated standard voltage received via a power line or a signal line of an electrical and/or electronic system, and the electrical and/or electronic system including the electrical and/or electronic system protecting circuit. The abrupt MIT device of the electrical and/or electronic system protecting circuit abrupt is connected in parallel to the electrical and/or electronic system to be protected from the noise. The electrical and/or electronic system protecting circuit bypasses toward the abrupt MIT device most of the noise current generated when the voltage greater than the rated standard voltage is applied, thereby protecting the electrical and/or electronic system.
摘要:
Provided are a circuit for continuously measuring a discontinuous metal-insulator transition (MIT) of an MIT element and an MIT sensor using the circuit. The circuit comprises a to-be-measured object unit including the MIT element having a discontinuous MIT occurring at the transition voltage thereof, a power supply unit applying a predetermined pulse current or voltage signal to the to-be-measured object unit, a measurement unit measuring the discontinuous MIT of the MIT element, and a microprocessor controlling the power supply unit and the measurement unit. The discontinuous MIT measurement circuit continuously measures the discontinuous MIT of the MIT element, and thus it can be used as a sensor for sensing a variation in an external factor.
摘要:
An abrupt MIT (metal-insulator transition) device with parallel MIT material layers is provided. The abrupt MIT device includes a first electrode disposed on a certain region of a substrate, a second electrode disposed so as to be spaced a predetermined distance apart from the first electrode, and at least one MIT material layer electrically connecting the first electrode with the second electrode and having a width that allows the entire region of the MIT material layer to be transformed into a metal layer due to an MIT. Due to this configuration, deterioration of the MIT material layer, which is typically caused by current flowing through the MIT material layer, is less likely to occur.
摘要:
Provided are a temperature sensor using a metal-insulator transition (MIT) device subject to abrupt MIT at a specific temperature and an alarm including the temperature sensor. The abrupt MIT device includes an abrupt MIT thin film and at least two electrode thin films that contacts the abrupt MIT thin film. The abrupt MIT device generates abrupt metal-insulator transition at a specific transition temperature. The alarm includes a temperature sensor comprising an abrupt MIT device, and an alarm signaling device serially connected to the temperature sensor. Accordingly, the alarm can be manufactured to have a simple circuit and be of a small size by including the temperature sensor using an abrupt MIT device.
摘要:
Provided are a low-voltage noise preventing circuit using an abrupt metal-insulator transition (MIT) device which can effectively remove a noise signal with a voltage less than a rated signal voltage. The abrupt MIT device is serially connected to the electrical and/or electronic system to be protected from the noise signal, and is subject to abrupt MIT at a predetermined voltage. Accordingly, low-voltage noise can be effectively removed.
摘要:
Provided are a 3-terminal MIT switch which can easily control a discontinuous MIT jump and does not need a conventipnal gate insulating layer, a switching system including the 3-terminal MIT switch, and a method of controlling an MIT of the 3-terminal MIT switch. The 3-terminal MIT switch includes a 2-terminal MIT device, which generates discontinuous MIT in a transition voltage, an inlet electrode (200) and an outlet electrode (300), which are respectively connected to each terminal of the 2-terminal MIT device, and a control electrode (400), which is connected to the inlet electrode and includes an external terminal separated from an external terminal of the inlet electrode, wherein an MIT of the 2-terminal MIT device is controlled according to a voltage or a current applied to the control electrode. The switching system includes the 3-terminal MIT switch, a voltage source connected to the inlet electrode, and a control source connected to the control electrode.
摘要:
Provided are a MIT device self-heating preventive-circuit that can solve a self-heating problem of a MIT device and a method of manufacturing a MIT device self-heating preventive-circuit integrated device. The MIT device self-heating preventive-circuit includes a MIT device that generates an abrupt MIT at a temperature equal to or greater than a critical temperature and is connected to a current driving device to control the flow of current in the current driving device, a transistor that is connected to the MIT device to control the self-heating of the MIT device after generating the MIT in the MIT device, and a resistor connected to the MIT device and the transistor.