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5654861 |
Thermal protection circuit
A bandgap type, thermal protection circuit for an integrated circuit does not require the use of a comparator and a voltage divider of the bandgap voltage. By contrast, the simplified thermal...
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5642252 |
Insulated gate semiconductor device and driving circuit device and electronic system both using the same
An improvement in conditions that protective functions of an insulated gate semiconductor device with a protection circuit incorporated therein are performed, an improvement in the cutoff of...
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5640293 |
High-current, high-voltage solid state switch
A high-current, high-voltage solid state switch includes at least one solid state switching component connected to control circuitry configured into a single package. In the preferred embodiment,...
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5638246 |
Semiconductor device having a protection circuit, and electronic system including the same
In a semiconductor device including a power MOSFET (M 0 ) for the output stage, a temperature detection circuit produces an output signal upon detecting an abnormal rise in the chip temperature,...
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5633775 |
Fire sentry power cable
Power cable includes, along with standard conductor wires encased in insulation, a heat responsive cable alongside the conductor wires. The heat responsive cable includes helically wound wires each...
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5631800 |
Apparatus for determining operating state of cooling fan
An apparatus for detecting an operating state of a cooling fan in a computer system protects the computer system from damage due to excessive heat by preventing further operation of the computer...
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5631799 |
Fusion heat sink for integrated circuit
An integrated circuit system includes an integrated circuit with a heat sink assembly including a fusible core. In the event that power dissipation by the integrated circuit threatens to exceed its...
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5627714 |
Electronic thermal protection device
Electronic device for thermal protection of a load (M) by cutting off the polyphase power supply to said load, including current transformers (Ti 1 , Ti 2 , Ti 3 ) installed on the wires (L 1 , L 2...
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5627719 |
Electrical wiring system with overtemperature protection
A household electrical service (10) is protected against overheating by running a sensor line or wire (36 or 38), coextensively together with hot, neutral and ground lines or wires (12, 13, 14 or...
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5625520 |
Device for preventing a high voltage transformer of a microwave oven from being overheated
Disclosed is a device for preventing a high voltage transformer of a microwave oven from being overheated, which directly senses a temperature in a second coil of the high voltage transformer of...
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5615077 |
Active terminator the thermal shutdown state of which can be detected
An active terminator comprises a thermal shutdown circuit. When this circuit detects a predetermined high temperature, this information is supplied to a driver, and the active terminator stops...
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5615071 |
Thermal protector for hermetic electrically-driven compressors
A thermal protector for a hermetic electrically-driven compressor includes a thermal switch and a cluster socket. The protector is mounted inside a compressor housing on a terminal assembly mounted...
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5610792 |
Apparatus for controlling the reset of a bus connected transceiver
A method and apparatus for stopping the operation of a failed device and preventing that device from being turned back on is shown, using two thresholds, a first failure threshold is shown when the...
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5606483 |
Wire protecting apparatus for automobiles
A wire-protecting apparatus for automobiles in which at least one power-supplying lead for supplying an electric power to a load has at least one PTC element inserted in series with the...
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5600306 |
Receptacle unit and extension cord
An electrical receptacle unit includes at least one receptacle body (3) internally provided with a pair of slotted terminals (4) for insertion of a pair of blades (L) of a load-side electrical plug...
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5600528 |
Heater cut off circuit and method
A safety device for heated sensors. A signal representing a threshold voltage is compared with a signal from the sensor representing sensor temperature. If the latter is greater than the threshold...
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5598314 |
Control of cooling fan by using power supply current
A control system for a cooling fan in an electronic system. Power consumption (and therefore heat) is sensed by sensing power supply current. When power supply current exceeds a threshold value,...
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5596466 |
Intelligent, isolated half-bridge power module
A power module having at least one power transistor. Each power transistor is coupled to and protected by an overvoltage clamp and desaturation detection circuit. An output current measurement...
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5594609 |
Thermoelectric couple device
A thermoelectric couple device including a thermoelectric couple consisting of a first aluminum oxide base plate, a second aluminum oxide base plate, a plurality of copper foils respectively welded...
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5590011 |
Short circuit protected splice connector
A method and apparatus for providing electrical protection for circuits that use splice connections between a source of electrical power and wires of respective circuits. The splices provide a...
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5587863 |
Digital interface unit
The present invention relates to a device for adaptation of digital input signals (DI) or output signals (DO) and which, per se, exhibits the functions selection between utilization of the device...
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5581471 |
Method and apparatus for storing electric power measurements
An electronic instrument that records electric power measurements. The instrument contains two types of memories: the first type of memory can tolerate wide fluctuations in ambient temperature but...
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5570262 |
Hybrid overload relay
An overload relay including a thermal actuator heated by a control circuit is disclosed herein. The overload relay includes a contactor having a pair of contacts for interrupting the application of...
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5568347 |
Load driving circuit with protective circuit
A driving circuit for driving a given load based on a load control signal is provided which includes a power transistor, a protective circuit, and a power transistor control circuit. The power...
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5563760 |
Temperature sensing circuit
A temperature sensing circuit (100) for sensing the temperature of an active semiconductor device, for example, a power MOSFET (11) of a semiconductor body (10). The circuit has a first temperature...
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5563759 |
Protected three-pin mosgated power switch with separate input reset signal level
A three-terminal Smart Power MOSgated device has short circuit, over-temperature and over-voltage protection and the like. The control circuit and the protective circuits are powered from an input...
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5555152 |
Monolithically integrated mos output-stage component having an excess-temperature protection device
A monolithically integrated MOS output-stage component, particularly a DMOS output stage, includes an output-stage element having a GATE connection, a SOURCE connection, and a DRAIN connection, and...
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5550526 |
Thermal detection elements with heater
The present invention provides thermal detection elements having a controlled relationship between a thermal radiating and thermal sensing element. The thermal detection element includes an...
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5550701 |
Power MOSFET with overcurrent and over-temperature protection and control circuit decoupled from body diode
An NPN transistor is added to the chip of a power integrated circuit which contains a power MOSFET and a control circuit in a common chip. The NPN transistor is coupled between the P well...
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5550702 |
Adaptive duty-cycle limiting for overload protection of integrated circuits
A technique for which integrated circuit duty-cycle control or pulse width current limiting adaptively responds to the load, allowing a brief inrush current event upon startup of the load, while...
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5543998 |
Temperature protected power transistor circuit
A temperature protected power transistor circuit for preventing thermal breakdown of a power transistor is disclosed. The temperature protected power transistor circuit has a silicon power...
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5543996 |
Protective circuit for protecting transistor from thermal destruction
An overheat protective circuit includes a first voltage generator generating a first voltage stabilized against a change of an operating temperature, a second voltage generator generating a second...
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5528446 |
Integrated power module diagnostic unit
An integrated power module combining drivers and power devices includes a diagnosis module integrated with or connected to the integrated power module. That includes protectors. The protectors...
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5519558 |
Three phase throttle current technique
A current throttle resistor external to a contactor device protects an electrical power distribution circuit coupling a load to a power line. The contactor has electrical switching contacts in...
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5497870 |
Electromagnetic clutch slip protection system
Rotation slip between the rotor and the armature of an electromagnetic clutch results in the exciting current I in the electromagnetic coil decreasing locally abruptly to form a unique waveform....
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5495383 |
Circuit for protecting electronic equipment from overvoltage or overcurrent conditions
A circuit for protecting a semiconductor circuit or a telephone communication line from a lightning surge or overvoltage or overcurrent condition. The circuit incorporates a two-terminal surge...
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5495165 |
High-voltage power supply and regulator circuit for an x-ray tube with transient voltage protection
A high-voltage power supply and regulator circuit for an X-ray tube which utilizes solid state switching devices and provides protection against failure of the switching devices due to transient...
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5483102 |
Employing on die temperature sensors and fan-heatsink failure signals to control power dissipation
A circuit and method for reducing an internal clocking frequency of the semiconductor device upon receiving a first signal indicating that a fan element disposed on the semiconductor device is...
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5471129 |
Rechargeable light curing apparatus
A rechargeable light curing apparatus having at least one hand-operated device with a handle and an on/off switch and a recharging unit to which said hand operated device can be mechanically and...
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5469320 |
Low power fan drive circuit for personal computers
An efficient fan drive circuit to drive a variable fan used in a power supply of a personal computer system. The fan drive circuit uses a diode to establish the minimum fan speed during operation...
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5463521 |
Power supply protection circuit
In one aspect of the present invention, an apparatus for protecting electronic circuit elements from hazardous voltages is provided. The apparatus includes a source of electrical energy that...
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5463522 |
Housing and mounting arrangement for thermal protector device
A housing of electrical insulating material for a thermal protector used with an inductive device, such as a ballast transformer, in which the housing has an open portion through which the case of...
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5453904 |
Power control unit protection apparatus
A power control unit protection apparatus is provided in association with a power control unit for controlling high or low power supply selectively to a loud speaker. The power control unit...
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5440520 |
Integrated circuit device that selects its own supply voltage by controlling a power supply
The specification describes an integrated circuit device that selects its own supply voltage by controlling a programmable power supply. The programmable power supply provides a supply voltage in...
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5438309 |
Over-current/over-temperature protection device
An over-current/over-temperature protection device (1) which includes first and second electrical contacts (2,3), a separable resistance electrical current path (4) extending between the contacts,...
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5436784 |
Motor protection relay using thermal models
The motor relay includes thermal models representing the start and run conditions of a motor. The thermal models are implemented using measured current values and certain known operating parameters...
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5424897 |
Three leaded protected power device having voltage input
A voltage driven control die (20) for use with a power device (22) has been provided. The voltage driven control die includes an under voltage lock-out circuit (46) which inhibits drive to the...
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5422832 |
Variable thermal sensor
A thermal sensor for use in integrated circuits includes a plurality of MOSFET diodes. The thermal sensor senses temperature within the integrated circuit and provides a control signal. The control...
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5414416 |
Temperature dependent control module cluster unit for motor vehicle
A control module cluster unit which enables high-speed communication by restraining the effect of noise, for constituting a high-reliability vehicle control system including a plurality of control...
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5408379 |
Device for opening a circuit and device for protecting the circuit against surges
An insulating substrate has a heat generating resistor and an electrical conductor on its surface. A pair of conductors, such as power or communication leads, are connected to a protected circuit....
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