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| Number | Title | Issue Date |
| 8174810 | Method and apparatus for reducing differential mode and common mode reflections in motor drives A filter device reduces reflections on power lines from the motor drive to AC motors by providing a differential mode choke in series with a common mode choke both shunted by resistances tailored to the characteristic impedance of the power cable for differential mo... | 05/08/2012 |
| 8159798 | Latch-control protection circuit A latch-control protection circuit applied in a power converter is provided. The protection circuit has a comparing circuit unit and a logic gate. The comparing circuit unit is utilized to selectively output a default signal or a comparing signal according to a stat... | 04/17/2012 |
| 8159796 | Power integrated circuit with high insensitivity to parasitic inductances of wires for connection to a package and package for said integrated circuit The present disclosure relates to an integrated circuit and a package on which such integrated circuit is placed, the latter having a power output stage, at least one first pad, one second pad and one drive circuit for driving said power output stage, wherein the in... | 04/17/2012 |
| 8159797 | Overvoltage protection circuit An input terminal is externally input with an input voltage. An output transistor of N-channel MOSFET is arranged between the input terminal and an output terminal. A charge pump circuit steps up the input voltage. An error amplifier receives a voltage stepped up by... | 04/17/2012 |
| 8139334 | Over-voltage protection circuit The present invention pertains to a closed loop over-voltage protection for audio/video connection interfaces of devices especially of mobile devices. The over-voltage protection circuit for mobile devices comprising at least one connector with at least one electric... | 03/20/2012 |
| 8098469 | Electricity delivery system An electronic system can include a switch and a regulator coupled to the switch. The switch can be used to deliver electricity from a first terminal to a second terminal. The switch can also be used to prevent the second terminal from having a level that is higher t... | 01/17/2012 |
| 8098468 | Hardware overvoltage disconnecting circuit The invention relates to a voltage detection control technology, especially relate to a hardware overvoltage disconnecting circuit wherein a DC power supply module is disconnected from a power network when the AC power network is in the state of overvoltage. The har... | 01/17/2012 |
| 8094423 | Protection circuit for MOSFET The present invention relates to a protection circuit for MOS-technology field-effect transistors. The circuit comprises at least one MOSFET protected by a module for blocking said MOSFET, the module being placed between the gate of the MOSFET and an electrical cond... | 01/10/2012 |
| 8089740 | Clamp unit, and power supply having the same cross-reference to related application A clamp unit is adapted for controlling a clamp switch of a power supply such that the power supply outputs an output voltage in an ON mode when the clamp switch is in an ON-state and that the power supply does not output the output voltage in an OFF mode when the c... | 01/03/2012 |
| 8089741 | Over-voltage protection device and method for manufacturing thereof An over-voltage protection device and a method for manufacturing the over-voltage protection device are provided. The over-voltage protection device includes a substrate, a pair of electrode layers, a mask layer, and a sealing layer. The electrode layers are dispose... | 01/03/2012 |
| 8077441 | Interface circuit and communication device An interface circuit and a communication device are provided. The interface circuit includes a transformer unit, a protection unit, and an interface unit. A secondary side of the transformer unit is connected with a chip. A first terminal of the protection unit is e... | 12/13/2011 |
| 8072724 | Over-voltage protection circuit An over-voltage protection circuit is disclosed herein for protection against over-voltage of an energy storage device while charging. The circuit operates within the operational limits of a battery-operated device, such as a mobile or handheld device. The over-volt... | 12/06/2011 |
| 8054600 | Switching power supply device A switching power supply device includes: a switching element connected through a primary winding of a transformer to an output end of an input rectifying/smoothing circuit that rectifies and smoothes an alternating current input voltage and outputs a direct current... | 11/08/2011 |
| 8045308 | Clamp protection circuit and a PFC control circuit employing such clamp protection circuit The present invention relates to clamp protection circuit and a PFC control circuit employing such clamp protection circuit. Said clamp protection circuit comprises a high voltage isolation module used for receiving power from a high voltage power supply; a voltage ... | 10/25/2011 |
| 8035942 | Safety switch device A safety switch device for switching a power supply for a load on and off, having at least one driveable switching element, in particular a relay, and a safety circuit for checking a switching state of the switching element. The switching element is in the form of a... | 10/11/2011 |
| 8035939 | Tracking and fault communication for DC power supply modules A plurality of DC power supply modules have track pins interconnected for tracking of output voltages of the modules during power-up and normal power-down. Each module pulls down its track pin voltage in response to any fault, and detects a track pin voltage below a... | 10/11/2011 |
| 8035941 | DC/AC inverter substrate having voltage abnormality detector circuit A DC/AC inverter substrate includes a voltage abnormality detector circuit. All of a high voltage side detection sensor, a low voltage side detection sensor, and a high-voltage and low-voltage detection sensor in the voltage abnormality detector circuit are disposed... | 10/11/2011 |
| 8035940 | Over-voltage protection circuit structure and method thereof An over-voltage protection circuit structure for protecting a high power translation circuit is provided. The over-voltage protection circuit structure receives an alternating current input and comprises a relay circuit, a voltage detection module, and an energy sup... | 10/11/2011 |
| 8031450 | Power supply control circuit A power supply control circuit includes a control circuit that controls an output transistor to be rendered conductive by forming a second electrical path between a second power supply line and a control terminal of the output transistor when a power supply voltage ... | 10/04/2011 |
| 8018699 | Over voltage protection for reduced level electrical signal interfaces A device for protecting sensitive electronic equipment from low level signal lines short circuited to high voltage power sources includes a switch that open the circuit between the data lines and the sensitive computing equipment if a high voltage condition is detec... | 09/13/2011 |
| 8018700 | Risk of shock protection circuit A risk of shock (ROS) protection circuit is disclosed, which comprises a capacitor that charges whenever there is a voltage between a ground on a lamp ballast and earth ground. If the capacitor exceeds a predetermined threshold voltage, the capacitor causes a gate t... | 09/13/2011 |
| 8018701 | Backlight control circuit with protecting circuit An exemplary backlight control circuit includes a load (250), an inverter circuit (230), a pulse width modulation integrated circuit (PWM IC) (210), a protecting circuit (270), and a feedback circuit (240). The load (250) in... | 09/13/2011 |
| 8009400 | Interface circuit and portable electronic device employing the same An interface circuit for connecting with a universal serial bus (USB) data cable includes a USB connector for connecting with the USB data cable, an over voltage protection (OVP) circuit connected to the USB connector, and a time delay circuit connected to the USB c... | 08/30/2011 |
| 8004807 | Overvoltage protection circuit with reduced sensitivity to process variations An overvoltage protection circuit includes a shunt circuit adapted for connection to at least one circuit node to be protected from an overvoltage condition and a voltage generator coupled to the shunt circuit. The shunt circuit is selectively activated as a functio... | 08/23/2011 |
| 7990671 | Overvoltage protection control circuits and overvoltage protection control methods An overvoltage protection control circuit includes a voltage conversion circuit, a voltage comparison circuit, and a switching circuit. The voltage conversion circuit generates a first voltage and a second voltage based on a power supply voltage. The voltage compari... | 08/02/2011 |
| 7986504 | Distributing power to an integrated circuit A power supply cell for distributing power supplied from a first voltage supply to an integrated circuit is disclosed. The power supply cell comprises: a layer comprising conductive material, the conductive material providing a conduction path for current flowing fr... | 07/26/2011 |
| 7948727 | Over-voltage protection circuit An over-voltage protection circuit is disclosed herein for protection against over-voltage of an energy storage device while charging. The circuit operates within the operational limits of a battery-operated device, such as a mobile or handheld device. The over-volt... | 05/24/2011 |
| 7940503 | Power semiconductor arrangement including conditional active clamping A power semiconductor arrangement including conditional active clamping (CAC). One embodiment includes a power semiconductor arrangement. A controllable power semiconductor switch includes a load path. A driver unit for switching the load path to either an ON-state ... | 05/10/2011 |
| 7898783 | Methods and apparatus to reduce substrate voltage bounces and spike voltages in switching amplifiers Methods and apparatus to reduce voltage bounces and spike voltages in switching amplifiers are disclosed. An example method of removing a substrate current from a substrate disclosed herein comprises injecting the substrate current via turning on an active device, f... | 03/01/2011 |
| 7869176 | Surge protected power supply An overvoltage protection circuit for protecting a pass element in a controlled voltage supply circuit electrically connected between a circuit power supply interconnection terminal region suited for electrical connection to a circuit power supply and an output term... | 01/11/2011 |
| 7864496 | Load dump protection for power FET device A load dump protection system is operable to provide protection for power transistors used to drive a blower motor of a vehicle. The load dump protection system includes circuitry for detecting an over-voltage transient. The circuitry adjusts a drive transistor into... | 01/04/2011 |
| 7859809 | Test plug with overvoltage protection A test plug for use with protective relays has a circuit that when it detects an overvoltage on the secondary side of a current transformer limits the overvoltage amplitude and the occurrence of the overvoltage to a predetermined number of peaks that are less than a... | 12/28/2010 |
| 7855864 | Switched mode power supply method and apparatus In one or more embodiments, a switched mode power supply circuit is configured to monitor and control its output voltage during discontinuous conduction mode (DCM) operation, to prevent output over-voltage conditions. For example, in one embodiment, a switched mode ... | 12/21/2010 |
| 7855865 | Circuitry protection arrangement A circuit and a method are provided for protecting sensitive circuitry from over voltage and over current during a double fault situation. The circuit may be used in a portable electronic device, and may include an over voltage protection component and an over curre... | 12/21/2010 |
| 7835124 | Short circuit and over-voltage protection for a data bus An apparatus for protecting a device against an over-voltage condition that is in excess of its breakdown voltage includes a detector for detecting the over-voltage condition and a protection circuit for protecting the device in response to detection of the over-vol... | 11/16/2010 |
| 7826190 | Over-voltage protection device An over-voltage protection device includes a comparison module, a first switch, a second switch and an output switch. The comparison module compares a divided input voltage with a threshold voltage to output a control signal according to the comparison result. The f... | 11/02/2010 |
| 7813093 | Output driver with overvoltage protection An output driver in an integrated circuit includes a driver circuit operable by a power supply voltage and coupled to an output pad, and a driver power conditioner configured to generate a fractional pad voltage in response to a voltage on the output pad and to prov... | 10/12/2010 |
| 7778000 | Measure for increasing the short-circuit resistance of a device by introducing parallel current paths An overcurrent protection arrangement for aircraft to protect an electric element from an overcurrent, the overcurrent protection arrangement including an overcurrent protection device designed for detecting the overcurrent of a current through the electric element ... | 08/17/2010 |
| 7773357 | Auto-detecting CMOS input circuit for single-voltage-supply CMOS An auto-detecting input circuit is operative to sustain relatively high voltages applied to an input pad and generate corresponding signal levels at a native supply voltage range. The input circuit includes floating wells, corresponding bias selectors, and input bia... | 08/10/2010 |
| 7768755 | Over-voltage protection and automatic re-strike circuit for an electronic ballast The present invention is an overvoltage protection and automatic re-strike circuit for an electronic ballast. The electronic ballast has an inverter, a shut-down circuit, a safety circuit, a monitoring circuit, and an overvoltage protection circuit. The inverter pro... | 08/03/2010 |
