Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7679348 | Switching regulator A switching regulator is disclosed that is able to operate with low power consumption and able to prevent variation of an output voltage. The switching regulator operates in a PWM control mode and a PFM control mode, and includes a switching unit; an error amplifica... | 03/16/2010 |
| 7679346 | Power supply apparatus and operation-mode determining unit and method thereof A power supply apparatus and an operation-mode determining unit and a method thereof are provided. The power supply apparatus includes first and second control units, a switching unit, a power output unit, and an operation-mode determining unit. The first and second... | 03/16/2010 |
| 7679349 | Switching systems and methods with current sensing Embodiments of the present invention include an electronic circuit for performing current sensing. In one embodiment, the present invention includes a first switching transistor and a second switching transistor both coupled to receive a first switching current and ... | 03/16/2010 |
| 7679347 | Closed-loop digital control system for a DC/DC converter A control system comprises a DC/DC converter that includes first and second inductances, that receives a first DC voltage and that generates a second DC voltage. A control module selectively charges or discharges the first inductance while discharging or charging th... | 03/16/2010 |
| 7667443 | System and method for near zero light-load supply current in switching regulator Techniques for near zero light-load supply current in switching regulators are described. In one aspect a voltage regulator operating a normal mode is generating an error signal indicating a difference between the output and the regulated voltage. A control signal, ... | 02/23/2010 |
| 7663354 | Voltage clamp circuit, a switching power supply device, a semiconductor integrated circuit device, and a voltage level conversion circuit The present invention provides a voltage clamping circuit which is operated in a stable manner with the simple constitution and a switching power source device which enables a high-speed operation. In a switching power source device, one of source/drain routes is co... | 02/16/2010 |
| 7663355 | Power supply apparatus In a power supply apparatus that is so configured as to produce from an input voltage an output voltage Vo within a predetermined permissible variation range, the output voltage Vo is so controlled as to decrease within the permissible variation range as the output ... | 02/16/2010 |
| 7656140 | Nonlinear digital control circuit and method for a DC/DC converter A control circuit for a DC/DC converter has a linear-control loop, which receives a quantity to be controlled and a first reference quantity, and generates a modulation value. A nonlinear modulation unit is activated in presence of a variation of the quantity to be ... | 02/02/2010 |
| 7652458 | Power converting apparatus, electronic apparatus comprising the same and power converting method A power converting apparatus includes a power input part to which power is input; a power converting part converting the power input through the power input part; a converting current detecting part detecting a converting current of the power converted in the power ... | 01/26/2010 |
| 7652457 | Switching regulator circuit including an inductor shunt switch A switching regulator circuit includes a switching circuit that may be configured to alternately apply a supply voltage and a reference voltage to an inductor coupled between a first node and an output node. The switching regulator circuit also includes a switch suc... | 01/26/2010 |
| 7646183 | Adjusting an output voltage of a converter based on current consumption A system includes a converter to convert an input voltage to an output voltage, where the converter has an adjustment input. The system further includes a voltage adjustment logic to receive an indication of an electrical current consumed by a load, with the voltage... | 01/12/2010 |
| 7646184 | Method and apparatus for maintaining a constant load current with line voltage in a switch mode power supply A power supply including a regulation circuit that maintains an approximately constant load current with line voltage. In one embodiment, a regulation circuit includes a semiconductor switch and current sense circuitry to sense the current in the semiconductor switc... | 01/12/2010 |
| 7642762 | Current source with indirect load current signal extraction A switching circuit for supplying current to a load has a switching element, an inductive element coupled to the switching element, and a load current extraction circuit responsive to current in the inductive element for producing a load current signal as a simulate... | 01/05/2010 |
| 7642763 | Switching power supply circuit having independent loops An exemplary switching power supply circuit (2) includes a power source (20), a pulse width modulation (PWM) circuit (21), a first switching circuit (22), a second switching circuit (23), a first transformer (25), and a seco... | 01/05/2010 |
| 7638993 | Method of feedback controlling a switched regulator A method of feedback controls a switched regulator generating a regulated voltage on an output terminal and being driven by a pulse width modulated (PWM) signal that determines on-phases during which the output terminal is selectively connected to a supply line, and... | 12/29/2009 |
| 7633278 | Switching regulator In a replica circuit, a potential simulating a waveform of current passing through an inductor is generated as a referential potential. A timing when the referential potential and an output potential become substantially the same as each other and a timing when the ... | 12/15/2009 |
| 7626369 | Switch mode power converter A load line regulated switched-mode power converter supplies an output voltage and an output current to a load. The power converter includes an inductor, a switch coupled to the inductor, a first impedance, a second impedance, and a power converter controller. The p... | 12/01/2009 |
| 7626370 | Apparatus and method for hysteretic boost DC-DC converter A boost hysteretic DC-DC converter is provided. The converter includes a power switch, a hysteretic comparator, an inductor, an output capacitor, and a resistive device. The resistive device is coupled to the bottom of the output capacitor, so that the output voltag... | 12/01/2009 |
| 7622904 | Power array system and method A method of reducing switching losses in a switch array for an output regulator, the switch array to convert energy from an input source to a regulated output of the output regulator, the switch array including at least two power switches, includes determining an ex... | 11/24/2009 |
| 7619398 | Programmable on-chip sense line Disclosed herein is a system for controlling power supply voltage to an on-chip power distribution network. The system incorporates a programmable on-chip sensing network that can be selectively connected to the power distribution network at multiple locations. When... | 11/17/2009 |
| 7615978 | Current mode control with feed-forward for power devices A power device controller includes a voltage mode control loop to generate an error voltage and to control a power device and a current mode control loop to generate a current control voltage and to control the power device. The current mode control loop includes a ... | 11/10/2009 |
| 7605573 | Switching regulator providing slope compensation and voltage control method thereof A CMC-type switching regulator is disclosed that includes: a switching element switching to control outputting of input voltage; a smoothing circuit outputting the smoothed output voltage of the switching element to an output terminal; a voltage divider dividing the... | 10/20/2009 |
| 7602163 | Coupled inductor output regulation An information handling system includes a power converter having a first switched inductor to supply current to a load. A second switched inductor is inductively coupled to the first switched inductor. A control circuit activates the second switched inductor in resp... | 10/13/2009 |
| 7602164 | Adaptive DC to DC converter system The present invention discloses an integrated voltage regulator comprising a switching regulation and an additional regulation mechanism. The additional regulation mechanism permits better control of the voltage regulator to enable improved performance. The present ... | 10/13/2009 |
| 7602165 | Phase control device for DC/DC converter A phase control device for use with a voltage-boosting DC/DC converter includes a current sensor for detecting a current flowing through at least one of the primary and secondary windings of a transformer of the DC/DC converter, a ripple determining section for, on ... | 10/13/2009 |
| 7595618 | DC voltage converter with a detector circuit configured to distinguish between operating modes A DC voltage converter is provided that cyclically converts an input-side supply voltage into an output voltage, and includes an inductive storage element connected between a supply voltage terminal and, in a manner such that it is coupled via a first switch, a refe... | 09/29/2009 |
| 7595617 | Switching power supply control A switching power supply controller includes a comparator to compare a feedback signal to a first limit and a second limit, one of which includes a ramp. Limit generators may be used to generate limit signals in response to power supply signals, control signals, and... | 09/29/2009 |
| 7595619 | Feed-forward circuit for adjustable output voltage controller circuits A feedback loop in a variable power supply has an adjustable response speed based on operating conditions of the power supply. The response speed can be increased upon encountering a transient to improve response performance to the transient. A response speed contro... | 09/29/2009 |
| 7589508 | Low-noise switching voltage regulator and methods therefor Several techniques are provided to increase the efficiency and reduce the EMI of produced by a multiphase switching voltage regulator. According to one technique, a multiphase switching voltage regulator is controlled by varying in time the duration and/or position ... | 09/15/2009 |
| 7586296 | Power supply apparatus The power supply apparatus includes a stepdown switching power supply circuit having a switching element and a smoothing circuit, a filter circuit located in the upstream of the stepdown switching power supply circuit and having a noise-suppressing inductor, and a s... | 09/08/2009 |
| 7586297 | Soft start circuit, power supply unit and electric equipment A soft start circuit includes a constant current source for generating a constant current, a first current mirror circuit for generating from the constant current a first mirror current, a second current mirror circuit for generating from the constant current a seco... | 09/08/2009 |
| 7579816 | Single feedback input for regulation at both positive and negative voltage levels A voltage regulator provides a regulated output load voltage at either a positive level or an inverted level relative to an input supply voltage. A switching circuit and control circuit are formed on an integrated circuit having a single pin for coupling to regulato... | 08/25/2009 |
| 7579817 | Constant-voltage circuit capable of reducing time required for starting, semiconductor apparatus including constant-voltage circuit, and control method of constant-voltage circuit A constant-voltage circuit includes a switching regulator and a series regulator each configured to start operating according to a selection signal input from outside the integrated circuit for exclusively causing one of the switching or the series regulators to ope... | 08/25/2009 |
| 7573248 | Step-up switching voltage regulator circuit A power voltage of a battery (including a secondary battery) mounted on a portable device drops with use or the like of the portable device. Therefore, a step-up switching voltage regulator circuit is mounted on the portable device. On the other hand, the power volt... | 08/11/2009 |
| 7567069 | Step-up power supply device A step-up power supply device includes: a step-up converter; a startup circuit which controls the on/off operation of a switch element of the step-up converter when an output voltage of the device is smaller than a reference voltage; and a control circuit which oper... | 07/28/2009 |
| 7564231 | Switching power supply source A switching power supply source including an inductance with first and second terminals; an output node; an NMos transistor, the drain of which is connected to the first terminal; a PMos transistor, the drain of which is connected to the first terminal; a control de... | 07/21/2009 |
| 7560915 | Power supply apparatus provided with regulation function and boosting of a regulated voltage A voltage comparator of a power supply apparatus detects overshoot by comparing an output voltage with a threshold voltage. The power supply apparatus is provided with three switches. Upon detection of overshoot, the boosting operation of a booster circuit is suspen... | 07/14/2009 |
| 7557551 | Amplitude modulated switching voltage regulator The present invention is a high efficiency AM switching voltage regulator used to provide an AM output signal to an AM RF power amplifier, wherein the AM output signal is proportional to an AM input signal. The AM output signal includes an AM output voltage and an A... | 07/07/2009 |
| 7557552 | Adaptive DC to DC converter system using a combination of duty cycle and slew rate modulations The present invention discloses an integrated voltage regulator comprising a switching regulation and an additional regulation mechanism. The additional regulation mechanism permits better control of the voltage regulator to enable improved performance. The present ... | 07/07/2009 |
| 7557553 | Power supply circuit and control method thereof A power supply circuit and a control method are provided, in which the original enable pad and output pad, or the enable pad and feedback pad are used to trim the output voltage of the power supply circuit without extra trim pads. ... | 07/07/2009 |