Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8148962 | Transient load voltage regulator Systems and methods providing for improved voltage regulation of a supply voltage for an integrated circuit are described herein. The voltage regulator circuit includes a feedback circuit coupled to a first current path and adapted to maintain a gate voltage of a fe... | 04/03/2012 |
| 8093875 | System and method for cable resistance cancellation A method for cable resistance cancellation. A single remote sense line and a simple cable resistance cancellation network are leveraged in a power supply unit to compensate for the total cable voltage drop, while maintaining tight output accuracy. By completely comp... | 01/10/2012 |
| 8085019 | Device for generating internal power supply voltage and method thereof Example embodiments relate to an internal power supply voltage generating device. The internal power supply voltage generating device may include a start-up voltage generating part, a reference voltage generating part, and/or an internal power supply voltage generat... | 12/27/2011 |
| 7960955 | Power supply device, electronic device using the same, and semiconductor device A linear regulator is provided which stabilizes an input voltage based on a reference voltage source that generates a reference voltage, and the reference voltage generated by the reference voltage. An output voltage of the linear regulator is supplied as a power su... | 06/14/2011 |
| 7928711 | Linear voltage regulator with accurate open load detection A linear voltage regulator is provided which has a pair of complementary power transistors connected “back to back” in series between a voltage input and a voltage output. A current sense circuit including a current sense resistor is connected in parallel across... | 04/19/2011 |
| 7884589 | Controllable power supply device with step-up function A controllable power supply device with a step-up function including a constant voltage generator, a programmable voltage generator, a first switch and a linear regulator is provided. The constant voltage generator is used to provide an initial voltage. The programm... | 02/08/2011 |
| 7830129 | Control circuit, voltage regulator and related control method A control circuit, applicable to a voltage regulator including a power switch. The control circuit includes a variable resistance generating unit and a detecting circuit. The variable resistance generating unit provides a variable resistor with resistance that varie... | 11/09/2010 |
| 7719243 | Soft-start system and method for power converter In one embodiment, a method for soft-start in a power converter includes the following: providing a feedback signal indicative of the output voltage of the power system at a first input terminal of an error amplifier in a negative feedback loop of the power converte... | 05/18/2010 |
| 7705575 | Standby regulator A standby regulator circuit includes a standby bias circuit and a standby operational amplifier. The standby regulator circuit provides a standby regulated control voltage to a multiplexer. A regular operational amplifier provides a regulated control voltage to the ... | 04/27/2010 |
| 7638992 | Drive power control device, liquid ejection apparatus, and drive power control method A drive power control device according to the present invention includes a transistor, which is input with a driving signal before current amplification into a base thereof, and which amplifies a current of the driving signal to drive an actuator; a switching elemen... | 12/29/2009 |
| 7619397 | Soft-start circuit for power regulators One embodiment of the present invention includes a system for providing a soft-start for a power regulator comprising a differential transistor pair that receives an input current and conducts a first current through a first transistor and a second current through a... | 11/17/2009 |
| 7612549 | Low drop-out regulator with fast current limit An LDO with fast current limit includes P-type transistor, an error amplifier, an adjustable reference voltage circuit for generating an adjustable reference voltage, and an N-type transistor. The P-type transistor includes a first end coupled to the input voltage s... | 11/03/2009 |
| 7557550 | Supply regulator using an output voltage and a stored energy source to generate a reference signal A technique includes using a first stored energy source to generate a reference signal to circuitry of a supply regulator in response to the regulator being in a startup state. The technique includes using an output signal that is provided by the regulator to genera... | 07/07/2009 |
| 7545128 | Regulator circuit With the objective of reducing current consumption of a regulator circuit per se, switches for performing on/off of an operating current are inserted in series with transistors of a reference voltage generating unit and a differential amplifying unit that constitute... | 06/09/2009 |
| 7541787 | Transistor drive circuit, constant voltage circuit, and method thereof using a plurality of error amplifying circuits to effectively drive a power transistor A transistor drive circuit, a constant voltage circuit, and a method thereof provided with a reference voltage generator, a power voltage detector, and a plurality of error amplifying circuits. The plurality of error amplifying circuits have different operational ch... | 06/02/2009 |
| 7531995 | Electronic device An electronic device includes: a DC power source which supplies a first DC supply voltage; a DC voltage converter which is enabled or disabled in response to a first control signal, and which converts the first DC supply voltage into a second DC supply voltage diffe... | 05/12/2009 |
| 7504809 | Power supply and a device for providing a control voltage that is substantially equivalent to a reference voltage used by the power supply In an embodiment of the present invention there is provided a device for providing a control voltage that is substantially equivalent to a reference voltage used by a power supply. The device includes a first electronic circuit that is arranged to be connected to a ... | 03/17/2009 |
| 7432693 | Low drop-out DC voltage regulator A low drop-out DC voltage regulator for regulating a voltage from a DC power supply applied to a load at an output of the regulator and comprising a pass device for controlling flow of current from the power supply to the load so as to control the output voltage at ... | 10/07/2008 |
| 7433249 | Apparatus with equalizing voltage generation circuit and methods of use A memory device includes an equalization voltage generator. The equalization voltage generator includes an oscillator and a charge pump to produce a first voltage, which may be used as an equalization voltage for pairs of complementary digit lines. The oscillator is... | 10/07/2008 |
| 7423414 | Apparatus and method for switching regulator with compensation delay for output voltage error correction A hysteretic regulator is provided. The hysteretic regulator includes a delay compensation circuit that adds a delay to the output of the hysteretic comparator. The delay is dependent on the input voltage. For low duty cycles, the slope of the inductor current is mu... | 09/09/2008 |
| 7420359 | Bandgap curvature correction and post-package trim implemented therewith A bandgap voltage reference circuit having temperature curvature correction, comprises a bandgap voltage source configured to generate an output voltage, and a novel curvature correction circuit. The correction circuit is responsive to the bandgap voltage source out... | 09/02/2008 |
| 7408331 | Constant voltage power supply circuit and method of controlling the same A constant-voltage power supply circuit is disclosed that is able to prevent overshoot of an output voltage possibly occurring when changing a constant-voltage circuit in operation and is able to supply a constant output voltage. The constant-voltage power supply ci... | 08/05/2008 |
| 7394307 | Voltage regulator having reverse voltage protection and reverse current prevention A voltage regulator having a MOS transistor driver includes a p-channel MOS transistor at a voltage input terminal Vin and a p-channel MOS transistor at a voltage output terminal Vout. A drain of the input side p-channel MOS transistor is connected to the voltage in... | 07/01/2008 |
| 7388356 | System and method for providing voltage regulation in a multi-voltage power system A voltage regulator system is disclosed for use in selectively regulating a voltage source at a first output voltage potential and a second output voltage potential. The voltage regulator system includes a reference unit, a filter unit and a current source unit. The... | 06/17/2008 |
| 7385378 | Constant-voltage circuit, semiconductor device using the same, and constant-voltage outputting method providing a predetermined output voltage A constant-voltage circuit includes a first transistor, a first control circuit, and a second control circuit having a second transistor and a differential amplifier. The first transistor controls an output current according to a first control signal output by the f... | 06/10/2008 |
| 7368978 | Self regulating charge pump A charge pump includes a transistor of the charge pump modified to regulate a supply voltage to substantially reduce noise from the supply voltage when charging the capacitor of the charge pump and subsequently reduces noise at the voltage output. The charge pump ma... | 05/06/2008 |
| 7368896 | Voltage regulator with plural error amplifiers A constant voltage circuit that is capable of realizing high speed response with respect to an abrupt change in an input voltage or a load current is disclosed. The constant voltage circuit includes a first error amplifier with a high direct current gain and a secon... | 05/06/2008 |
| 7345465 | Two pin-based sensing of remote DC supply voltage differential using precision operational amplifier and diffused resistors A DC power supply control apparatus monitors respective terminals supplying positive and negative DC supply voltages to a utility device. The voltage at the negative terminal is compared with a target value for that voltage to produce an offset current representativ... | 03/18/2008 |
| 7342387 | System and method for providing a highly efficient wide bandwidth power supply for a power amplifier A system and a method are disclosed for providing a highly efficient wide bandwidth power supply for a power amplifier. A power supply control circuit of the invention comprises a wide bandwidth low drop out (LDO) circuit and a highly efficient switcher circuit. The... | 03/11/2008 |
| 7323854 | Zero cancellation in multiloop regulator control scheme Control loops in a voltage regulator can be stabilized using minimal silicon area. A current limit signal, generated by a current limit control loop in the voltage regulator, can be divided to minimize a zero provided in a compensation set associated with a voltage ... | 01/29/2008 |
| 7319310 | Regulated power supply unit An improved power supply unit includes a DC power source having a positive terminal and a negative terminal, and a voltage regulating circuit that includes a plurality of elements coupled in series between the positive and negative terminals of the DC power source t... | 01/15/2008 |
| 7315154 | Voltage regulator A voltage regulator has an output MOS transistor connected between a voltage source and an output terminal. A voltage dividing circuit is disposed between the output terminal and GND. An error amplifier receives a reference voltage from a reference voltage circuit a... | 01/01/2008 |
| 7312598 | Capacitor free low drop out regulator A low drop out (LDO) regulator that includes a novel error amplifier, which is arranged with a first stage that employs both NMOS and PMOS devices that are similarly doped in differential pairs and a second stage that operates with NMOS and PMOS devices in a push-pu... | 12/25/2007 |
| 7301316 | Stable DC current source with common-source output stage A current source is provided for use with integrated circuits such as programmable logic device integrated circuits. The current source has an operational amplifier with positive and negative inputs and an output. The output is connected to a common-source output st... | 11/27/2007 |
| 7288990 | Reference buffer with dynamic current control A method can allow a system to selectively control increasing of a bias source in a reference buffer or decreasing impedance looking into a output of the reference buffer for a temporary or selective time period, which can result in an increased overall efficiency o... | 10/30/2007 |
| 7285942 | Single-transistor-control low-dropout regulator A low-dropout regulator with a single-transistor-control providing improved transient response and stability is disclosed. The single-transistor-control provides a dynamic resistance at the output of the regulator for minimizing undershoot and overshoot, and hence i... | 10/23/2007 |
| 7285943 | Method of forming a reference voltage and structure therefor A selected bandgap reference (11) of a voltage generator (10) is operated at a duty cycle that is less than one hundred percent. The seclectable bandgap reference (11) has at a high current consumption when enabled and a low current consumption ... | 10/23/2007 |
| 7286417 | Low power dissipation voltage generator A voltage generator circuit is described for providing a regulated voltage, such as a negative word line voltage in a semiconductor memory. The generator uses a source transistor to couple a substrate voltage, Vbb, to an output voltage node. The transistor is select... | 10/23/2007 |
| 7278038 | Operational voltage control circuit and method A method and apparatus for providing a preferred operating voltage to a memory device as specified by a stored configuration parameter. The apparatus includes a nonvolatile memory configured to store a preferred memory device voltage configuration corresponding to a... | 10/02/2007 |
| 7276885 | Apparatus and method for power sequencing for a power management unit A PMU that includes LDOs is provided. The PMU also includes, for each LDO, a corresponding reference circuit that provides a reference voltage for the LDO. Further, the PMU includes a central bias circuit that provides a reference current to each of the voltage refe... | 10/02/2007 |
