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!
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| Number | Title | Issue Date |
| 8174248 | Systems and methods of bit stuffing pulse width modulation Systems and methods for bit stuffing pulse width modulation are provided. Example embodiments of the systems and methods of bit stuffing pulse width modulation disclosed herein may allow for a significant reduction in the size of the bootstrap capacitor while giving... | 05/08/2012 |
| 8174209 | DC-DC converter and method for minimizing battery peak pulse loading The invention relates to an electronic device, comprising a DC-DC converter for converting a primary supply voltage into an output voltage at an output node to be coupled to a super capacitor and a control stage for operating the regulated DC-DC converter in a forwa... | 05/08/2012 |
| 8159199 | On-chip voltage supply scheme with automatic transition into low-power mode of MSP430 An integrated electronic device includes circuitry for providing a system supply voltage from a primary power supply. The circuitry has a high power (HP) stage coupled to the primary power supply and having an output node coupled to a supply system node for providin... | 04/17/2012 |
| 8155164 | Spread frequency spectrum waveform generating circuit The objective of this invention is to provide a circuit that generates a spread frequency spectrum waveform with shaped frequency spectrum distribution. The waveform generator has a spread spectrum waveform generating circuit that generates a waveform with a spread ... | 04/10/2012 |
| 8154253 | Cell voltage abnormality detector and cell voltage monitoring device for a multi-cell series battery A circuit for detecting battery cell abnormalities in a multi-cell series battery for effectively and quickly detecting abnormalities with a simple, small circuit that provides improved reliability, safety and service life of the multi-cell series battery. In the vo... | 04/10/2012 |
| 8154222 | Pulse-width modulation current control with reduced transient time One embodiment of the present invention includes a current regulator circuit. The circuit includes at least one switch configured to periodically couple and decouple a respective at least one voltage rail to an inductor to maintain a current through the inductor. Th... | 04/10/2012 |
| 8149040 | Apparatus for generating a plurality of different voltage level clock signals A system is provided for generating a plurality of different voltage level clock signals. The system comprises an electrical energy storage pack having a plurality of series coupled electrical energy storage cells that provide a plurality of different output voltage... | 04/03/2012 |
| 8148963 | Self-oscillating converter A converter has a main feedback path and two auxiliary feedback paths from an output node to an auxiliary differential input pair of a comparator. The auxiliary feedback paths have different RC time constants so that a differential ramp signal is effectively applied... | 04/03/2012 |
| 8148914 | Dynamic power saving pulse width modulated LED driver circuit In accordance with an aspect of the present invention, an LED driving circuit includes a digital-to-analog converter and a driving portion. The circuit is operable to turn off the digital-to-analog converter at times when the driving portion is not providing a high ... | 04/03/2012 |
| 8141786 | Thin smart card module having strap on carrier A Smart Card module with flip-assembled chip (101) on a metallic strap (112) adhering to an insulating substrate (111). Chip (101) is in the gap (122) of a metal carrier (120), strap (112) conductively attached to the... | 03/27/2012 |
| 8138735 | Low-voltage start up circuit and method for DC-DC boost converter A start up circuit (4-1) for a boost circuit (10) includes an adjustable-duty-cycle oscillator (1-2) that turns on a switch transistor (MSW) connected to an inductor (L) receiving an input voltage (VIN). If a ... | 03/20/2012 |
| 8134850 | Systems and methods for frequency control of a voltage converter Various embodiments of the present invention provide voltage converters and methods for using such. As one example, a voltage converter is disclosed that includes a transformer, an operational detector, and a controllable oscillator. The transformer includes a first... | 03/13/2012 |
| 8130889 | Receive timing manager A novel receive timing manager is presented. The preferred embodiment of the present invention comprises an edge detection logic to detect the data transition points, a plurality of data flip-flops for storing data at different sample points, and a multiplexer to se... | 03/06/2012 |
| 8129962 | Low dropout voltage regulator with clamping Apparatus and methods for reducing output load transients of a low dropout voltage regulator (“LDO”) are disclosed herein. A voltage regulator includes an output driver coupled to a regulator output pin, the output driver provides current to a load external to t... | 03/06/2012 |
| 8125800 | Secondary-side amplifier with soft start An isolated switching regulator has a closed-loop soft-start feature that allows tighter regulation of the output voltage and eliminates or reduces overshoot. It also has an optional reset feature which will resoft-start the regulator during recovery from a fault on... | 02/28/2012 |
| 8125238 | Automatic test equipment A coupling line is provided for coupling a signal generator to a device under test and includes a first Zener diode and a second Zener diode. The first Zener diode and the second Zener diode are coupled in an antiserial manner. They are adapted to couple the signal ... | 02/28/2012 |
| 8125189 | Systems for charging a battery in a closed loop configuration A system is provided for charging a battery with an AC adapter. The system includes a first closed loop electrical path between the battery and the AC adapter. The first closed loop electrical path includes a first monitoring circuit for monitoring at least one firs... | 02/28/2012 |
| 8120884 | Reverse voltage protection circuit A voltage protection circuit that has a protection transistor coupled between a voltage supply pin of an integrated circuit and a voltage output terminal of the integrated circuit. A biasing circuit is coupled to a control node of the protection transistor and confi... | 02/21/2012 |
| 8120334 | System and method for phase management in a multiphase switching power supply A system and method for managing phases in a multiphase switching power supply turns off a phase in light load conditions and turns on a phase in heavier load conditions. The increase or decrease in the number of phases changes the efficiency of the power supply in ... | 02/21/2012 |
| 8120283 | LED device and LED driver A LED device having a LED array, LED driver ICs, DC-DC converter, a first feedback circuit consisting of voltage dividing resistors, and a headroom voltage monitoring circuit having controller and second feedback circuit. In second feedback circuit, headroom voltage... | 02/21/2012 |
| 8120209 | Voltage sensing device for an individual cell of a group of battery cells A voltage sensing device with which high-precision voltage sensing is possible without the need to obtain a unique correction constant for each device. A pair of voltage input nodes NCk and NCk-1 is selected from voltage input nodes NC0-NCn in switch p... | 02/21/2012 |
| 8115463 | Compensation of LDO regulator using parallel signal path with fractional frequency response A low drop out (LDO) voltage regulator (10) includes a pass transistor (MPpass) having a source coupled by an output conductor (4) to a load and a drain coupled to an input voltage to be regulated. An error amplifier (2) has a first i... | 02/14/2012 |
| 8115461 | Power supply circuit and battery device A power supply circuit with low noise and low power consumption and a battery device using the power supply circuit. If a voltage VDD is higher than a prescribed voltage, a charge pump circuit 140A is operated in “½ mode” (a step-down ratio of “2”), ... | 02/14/2012 |
| 8115453 | Method and apparatus for managing energy in plural energy storage units A system for managing energy stored in a plurality of series connected energy storage units has a plurality of energy storage unit controllers, each controller being associated with one of the plurality of energy storage units, a balancing circuit between two of the... | 02/14/2012 |
| 8111047 | Sensor node voltage clamping circuit and method A voltage clamping circuit includes a current source having a fixed current source and a variable current source and a variable resistor receiving current from the current source. The variable resistor varies its resistance in response to an environmental operating ... | 02/07/2012 |
| 8098091 | Method in the compensation of unlinearities in an amplifier, and uses of the method and the amplifier In a method and an amplifier for the compensation of unlinearities e.g. of the class D type, wherein an audio signal is pulse-width modulated, e.g. with a carrier wave signal in the form of a triangular signal to provide a pulse-width modulated small-signal, the so-... | 01/17/2012 |
| 8095584 | Random number generator using jitter sampled RF carrier A random number generator generates a string of random bits from a received RF signal source. A sample-and-hold circuit is coupled to the received RF signal source. The RF signal is sampled by a jittered clock signal from a source coupled to the sample-and-hold circ... | 01/10/2012 |
| 8093941 | Systems and devices for dynamically scaled charge pumping Systems and devices for dynamically scaled charge pumping are presented. Example embodiments of the disclosed systems of dynamically scaled charge pumping enable regulation of the output voltage at a particular ratio and to dynamically control the ratio based on the... | 01/10/2012 |
| 8093878 | Switching power supply device A switching power supply device for a ripple control system that can obtain the ripple component with the necessary amplitude without using discrete elements. On capacitor Ci of CR integrator 11, a voltage is generated corresponding to the integration value o... | 01/10/2012 |
| 8054652 | Systems and methods for off-time control in a voltage converter Various embodiments of the present invention provide voltage converters and methods for using such. As one example, a voltage converter is disclosed that includes a transformer with a first winding and a second winding. A voltage is applied to the first winding for ... | 11/08/2011 |
| 8049465 | Systems, methods and circuits for determining micro-short Various systems and methods for determining micro-shorts are disclosed. For example, some embodiments of the present invention provide battery systems including a determination of potential micro-shorts based on rate of change of state of charge. Such battery system... | 11/01/2011 |
| 8044649 | Dual mode regulation loop for switch mode power converter The invention relates to a DC-DC converter, which includes a power stage driven by a pulse width modulator, a first error amplifier with a first input coupled to a first reference voltage source and a second input coupled to a current sink through which a current is... | 10/25/2011 |
| 8044646 | Voltage regulator with quasi floating gate pass element Various apparatuses, methods and systems for a voltage regulator are disclosed herein. For example, some embodiments provide an apparatus for regulating a voltage including an N-channel transistor that is connected between an input and an output, an error amplifier ... | 10/25/2011 |
| 8035995 | ACDC converter This invention relates to an ACDC converter (1) comprising a converter input (3) and a converter output (5), a pre-regulation stage (7) and a DC transformer stage (9) comprising a transformer input stage (11) and a transform... | 10/11/2011 |
| 8035440 | Multistage charge pumps with diode loss compensation Multistage charge pumps with diode loss compensation are disclosed. In one example, a pre-regulated charge pump to generate a voltage is described. The example pre-regulated charge pump includes a charge pump having a plurality of stages and one or more diodes. The ... | 10/11/2011 |
| 8018740 | LLC soft start by operation mode switching An embodiment of the invention provides a method of reducing surge current in an LLC converter. The LLC converter comprises a switching circuit having a first switch and a second switch, a resonant circuit, and a rectification circuit. During start up of the LLC con... | 09/13/2011 |
| 8018235 | Methods and apparatus to facilitate ground fault detection with a single coil and an oscillator Methods and apparatus to facilitate ground fault detection with a single coil and an oscillator are disclosed. An example ground fault detection device includes a sense coil including a secondary winding surrounding a line conductor and a neutral conductor, the line... | 09/13/2011 |
| 8009395 | Methods and apparatus for over-voltage protection of device inputs Methods and apparatus for over-voltage protection of device inputs are disclosed. An example apparatus to protect a device from an over-voltage condition disclosed herein comprises a switch coupled between a device input and at least one component of the device, and... | 08/30/2011 |
| 8004248 | Systems and methods for multi-mode battery charging Various systems and methods for battery charging are disclosed herein. As just one example, a battery charger is disclosed that includes a current feedback loop that has a pulse width modulated current control output, and a voltage feedback loop that has a pulse wid... | 08/23/2011 |
| 7999558 | Systems and methods of overvoltage and undervoltage detection Systems and methods for overvoltage and undervoltage detection may be implemented with a fully differential circuit that includes a coarse comparator and a band gap based fine comparator. The coarse comparator may determine if the battery is closer to an OV conditio... | 08/16/2011 |
