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7633321 |
Driver circuit; electronic circuit having driver circuit and corresponding method
A driver circuit includes an output, at least one transistor including a load section coupled between the output and a supply voltage, and a circuit coupled to a control terminal of the at least...
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7619864 |
Regulator short-circuit protection circuit and method
A signal source generates a reference voltage, and a voltage regulator receives the reference voltage and generates an output voltage and current. During normal operation, a pass element in the...
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7605567 |
Battery protecting circuit and battery with such protecting circuit
A protecting circuit for a battery used to power an electronic system includes a control circuit and a sensing circuit. The sensing circuit includes a tri-axial accelerometer having X, Y and Z...
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7595969 |
Undervoltage warning method, undervoltage warning circuit and switching power supply
A method for identifying a cause for insufficiency of an output voltage reduced to or below an undervoltage set value comprises a first comparison step for comparing the output voltage to a fixed...
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7586292 |
Low voltage cutoff circuit for an electrochemical cell
The present invention is an electrical circuit that disconnects an electrochemical cell from a load when the cell's voltage descends to a predetermined value. The present invention is also...
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7535690 |
Arrangement and method for an integrated protection for a power system
For protecting a power system, two or three of over current, thermal and under voltage protection circuits are integrated as one protection circuit but operate independently, and one or more...
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7521984 |
Driving configuration of a switch
A driving circuit of a switch includes first and second transistors connected in series to each other and to relative intrinsic diodes in antiseries and driven by a driving device that includes at...
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7515393 |
Voltage regulator
According to one embodiment, a voltage regulator includes a switch configured to selectively conduct electrical energy according to a signal, and circuitry configured to provide the signal to...
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7508315 |
Signaling device and method of alerting a work machine operator to a predetermined condition using same
A signaling device includes an electrical circuit which discharges an electrical energy storage device through an electrically powered alert mechanism via a biased open transition switch upon...
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7486064 |
Under voltage lock out circuit and method
A voltage comparison unit compares a battery voltage with a predetermined threshold voltage, and outputs a comparison signal. A sequence circuit receives the comparison signal and a start-up signal...
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7471494 |
Output circuit
An output circuit for a circuit includes an input node coupled to the circuit, an output node, a reference potential terminal, a supply potential terminal, a semiconductor switch connected between...
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7468875 |
Plasma television and power supply control device
A microcomputer 60 takes in voltages output from the sustaining voltage Vsus generation circuit 52 , the addressing voltage Vadd generation circuit 53 , and the standby voltage generating...
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7460348 |
Overload detector/enunciator
An overload detector/enunciator circuit. The overload detector/enunciator circuit detects an overloaded condition of a backup generator and provides a relatively immediate indication of the...
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7453290 |
Supply voltage removal detecting circuit, display device and method for removing latent image
A supply voltage removal detecting circuit, a display device and method for removing a latent image when a supply voltage is disconnected, in which the supply voltage removal detecting circuit...
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7450359 |
System and method for providing a temperature compensated under-voltage-lockout circuit
A system and a method are disclosed for providing a temperature compensated under-voltage-lockout circuit that has a trip point voltage that is not sensitive to temperature variation. The...
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7443641 |
DC-DC converter including short-circuit protection circuit
Provided is a DC-DC converter including a short-circuit protection circuit which can stably perform a reset operation and a stop operation. The short-circuit protection circuit includes a detection...
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7440249 |
Undervoltage detection circuit
An undervoltage detection circuit includes a first transistor and a second transistor coupled to a supply voltage node and arranged to form a current mirror. The undervoltage detection circuit also...
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7417336 |
Combination current hysteresis and voltage hysteresis control for a power converter
Consistent with an aspect of the present disclosure, a method is provided for controlling an AC signal, which is supplied to a load and selectively supplied to a utility grid. In response to a...
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7408475 |
Power supply monitoring device
In a power supply monitoring device, a power supply voltage monitoring portion always monitors a power supply voltage supplied to a monitored circuit and outputs a voltage reduction signal when...
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7372684 |
Power supply device
A power supply device has a pulse width control circuit for controlling voltage converting operation of a voltage converting circuit by changing a pulse width. A momentary interruption detecting...
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7369384 |
Regulator and electronic apparatus therewith
To reduce the electric power wasted in an overvoltage protection circuit, a regulator IC 100 incorporates an overvoltage protection circuit 105 that stops the output operation of the regulator...
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7349190 |
Resistor-less accurate low voltage detect circuit and method for detecting a low voltage condition
A low voltage detect circuit is provided herein for detecting when an external voltage (Vext) drops below a predetermined minimum voltage. In general, the low voltage detect circuit described...
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7336060 |
Circuit and method for controlling a DC-DC converter by enabling the synchronous rectifier during undervoltage lockout
A control circuit for a DC-DC converter that prevents a deficiency from occurring due to sudden interruption in power supply. The control circuit activates and inactivates a main switching output...
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7310211 |
Method for suppressing latch-ups occurring in a circuit, and systems for carrying out said method
According to the invention, in order to suppress a latch-up, the supply voltage is switched off following the detection of a latch-up, charge located in the circuit is reduced with the air of a...
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7301736 |
Method and device for shutting down a drive with a matrix converter during a power outage
A method and a device for shutting down a drive during a power outage are disclosed. The method and device include a matrix converter, several commutation capacitors on the power line side, a...
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7262945 |
Electrical over/under voltage automatic disconnect apparatus and method
An analog or digital circuit that senses both low and high input voltage and operates to disconnect both line and neutral electrical power connections to a protected device when abnormally low or...
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7262947 |
Low voltage interrupter for electric winch
A low voltage interrupt for an electric winch prevents voltage decay of a battery due to excessive operation of the winch. If the battery voltage decays below a threshold, the low voltage interrupt...
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7224562 |
Short-circuit protective circuit
The invention provides a short-circuit protective circuit for a constant-voltage power-supply circuit. The constant-voltage power-supply circuit can realize a short-circuit protection with a simple...
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7212392 |
Personal body grounding system instrumentation and process
An improved personal body grounding system includes a grounding pad having two or more ground leads conductively coupled to one or more grounded anchors having multiple ground contact points. A...
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7196891 |
Control circuit for frequency converter
A control circuit for a frequency converter is provided. The control circuit includes a switch circuit, a timer switch, a starter circuit, a starter relay, and a timer relay. The control circuit is...
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7161393 |
Current regulation circuit
A method and circuit for providing a regulated current to a load stabilized with respect to the load current, a load voltage, and a circuit temperature. The circuit includes a power pass device, a...
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7149068 |
Circuit for controlling the minimum operating voltage of switching power supply
A circuit is provided for controlling a minimum operating voltage of an integrated control circuit of a switching power supply. The circuit includes at least one switch for switching the minimum...
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7142404 |
System and method for domain power monitoring and notification
A domain power notification system detects when a power domain experiences a power condition, such as lost power and low-voltage power, and communicates that information to the domains that...
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7112900 |
Method and system for sensing switch position to prevent inadvertent startup of a motor
A method for preventing sudden inadvertent operation of a motor of a tool or appliance when the motor is initially electrically connected to a power source while an On/Off switch for controlling...
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7046155 |
Fault detection system
A fault detection system detecting malfunctions or deteriorations, which may result in an inverter fault, is provided. The system has a temperature sensor installed on a semiconductor module to...
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7006340 |
Circuit configuration for protecting a battery against deep discharge
The inventive circuit configuration has only two poles and is connected in series between the battery and the load. The circuit configuration interrupts the electric circuit for a short time in...
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6970334 |
Power regulation loop performs two functions
A circuit provides a power regulation loop that operates in two modes and uses a single comparator between the two modes. One mode, an open mode, involves generating an overload signal when the...
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6958897 |
Electrical load drive control apparatus and electrical load drive control method
An electrical load drive control apparatus includes: a plurality of drive units, each of which drives one of a plurality of electrical loads; an instruction unit that issues a drive switch...
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6944003 |
Semiconductor integrated circuit with voltage-detecting circuit and signal transmitting and receiving system
A first semiconductor integrated circuit is connected to a second semiconductor integrated circuit with a cable. In the first semiconductor integrated circuit, when a power supply voltage becomes...
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6876531 |
Device for detecting failure of field effect transistor
A device for detecting failure of a field effect transistor (FET) includes a first FET1 connected in series with a motor M between a power source terminal and ground, a motor control unit 11 for...
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6862163 |
Method and device for bridging brief power outages in a matrix converter
A method and a device for bridging temporary power outages in a matrix converter are disclosed. In the event of a detected power failure, the matrix converter is disconnected from the power line...
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6853295 |
Vehicular control unit with self shut-off function and abnormality detection function
In a vehicular control unit, a main power supply voltage detecting section to detect a voltage value of a main power supply is provided and, an abnormality determining section determines an...
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6842321 |
Supply independent low quiescent current undervoltage lockout circuit
The UVLO (undervoltage lockout) circuit provides a very low quiescent current that is independent of supply voltage. The circuit includes a low voltage IPTAT (current proportional to absolute...
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6819534 |
Three-in-one protection circuit against out-rush current, short circuit and overload
The invention related to a three-in-one protection circuit against out-rush current, short circuits and overloading. A second power source connected to the output side of a transformer in a power...
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6788511 |
Domain power notification system
A domain power notification system detects when a power domain experiences a power condition, such as lost power and low-voltage power, and communicates that information to the domains that...
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6781807 |
Field device power supply failure detection
To detect a power supply failure on an intrinsically safe field bus of a manufacturing process control system in an efficient manner there is provided a field device with a discharge protection...
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6782298 |
Electronics for a shock hardened data recorder
Electronics for a shock-hardened device, in particular a data recorder, incorporating non-volatile memory. The device has the functional elements: a signal conditioning circuit, an oscillator, an...
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6775118 |
Supply voltage reference circuit
A supply reference voltage circuit is coupled to an output node, a supply voltage node and a supply reference voltage node and is operable to connect the output node to the supply reference voltage...
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6760202 |
Electrical coil module, an electrical coil comprising such modules, and actuation mechanism including such a coil and a circuit breaker comprising such an actuation mechanism
An electrical coil module of planar type manufactured by printed circuit techniques on a generally flat substrate ( 21 ) has a first layout ( 20 ) of conducing material constituting a first...
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6727555 |
Device for protecting electronic components
A device for protecting electronic components against overvoltages of a supply voltage is provided, which device includes at least one semiconductor transistor which is switchable by a trigger...
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