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| Number | Title | Issue Date |
| 8175087 | Method and system for communicating multiple data signals over a single unidirectional isolation component Method and system for serially sending data signals captured from multiple sources through a single unidirectional isolation component. Data signals from respective multiple sources are captured in parallel. Such captured data signals are stored in respective storag... | 05/08/2012 |
| 8163643 | Enhanced pad design for solder attach devices A semiconductor device is disclosed that has a die and a substrate having a die attachment area with a perimeter. A layer of solder connects the substrate and the die, the solder layer having at least one vent channel connected to the perimeter of the die attachment... | 04/24/2012 |
| 8159278 | Method for clamping a semiconductor region at or near ground A clamping circuit clamps a voltage received by an n-type semiconductor region without using a Schottky transistor. The clamping circuit includes a current mirror as well as first and second bipolar transistors. The current mirror receives a first current and suppli... | 04/17/2012 |
| 8143871 | Dynamically-compensated controller A dynamically-compensated controller may generate a switching signal for a DC power supply. The controller may include a feedback circuit having a first analog-to-digital converter and a separate analyzer circuit for generating information indicative of performance ... | 03/27/2012 |
| 8139329 | Over-voltage protection circuit An over-voltage protection circuit for use in low power integrated circuits is provided. The over-voltage protection circuit distributes certain connection and conditioning circuitry to a component network external to the integrated circuit. As a result, the integra... | 03/20/2012 |
| 8130133 | A/D converter using isolation switches In an A/D converter, isolation switches are used between the capacitors and the conversion switches. The conversion switches are those switches used to selectively couple the plates of the binary weighted capacitors to either Vref or 0 volts during the A/D conversio... | 03/06/2012 |
| 8120335 | Average inductor current mode switching converters An average current mode switching converter is described for providing a regulated output current independent of load conditions, and a regulated output voltage as a function of the load connected to the converter. The converter includes an inductor, a modulator, a ... | 02/21/2012 |
| 8120330 | Amplitude lock loop for producing constant amplitude oscillator ramp signal An oscillator that includes an energy storage system configured to store energy, a ramp circuit configured to generate an oscillating ramp signal having a slope that is a function of the amount of energy stored in the energy storage system, a charge circuit configur... | 02/21/2012 |
| 8116045 | Circuitry and methodology for protecting a boost DC/DC converter Protection circuitry protects a boost converter coupled between input and output nodes for driving a load coupled to the output node. The protection circuitry may comprise a first circuit configured for monitoring a voltage at the output node, the voltage being caus... | 02/14/2012 |
| 8089216 | Linearity in LED dimmer control A flyback controller may generate a switching signal for controlling the delivery of input current into a primary winding of a transformer in a flyback converter that has a secondary winding in the transformer and that is driven by AC output from a dimmer control th... | 01/03/2012 |
| 8085029 | Bandgap voltage and current reference Circuits and methods that improve the performance of reference circuits are provided. A reference generator circuit maintains a substantially constant output current over an extended temperature for use as a reference. Output current fluctuations caused by a poorly ... | 12/27/2011 |
| 8076793 | Magnetic isolation of power sourcing equipment control circuitry A circuit for providing electrical isolation of Power Sourcing Equipment (PSE) circuitry from external circuitry in a Power over Ethernet (PoE) system has an inductive circuit for providing an isolation barrier to electrically isolate an isolated side of the isolati... | 12/13/2011 |
| 8076181 | Lead plating technique for singulated IC packages A packaging technique is described for QFNs, DFN, and other surface mount packages that allows the sides of leads to be plated with a wettable metal prior to the lead frames being singulated from the lead frame sheet. The leads of the lead frames in the sheet are sh... | 12/13/2011 |
| 8063615 | Synchronous rectifier control for synchronous boost converter A synchronous boost DC/DC conversion system comprises an input for receiving a DC input voltage, an output for producing a DC output voltage, a power switch controllable to adjust an output signal of the conversion system, and an inductor coupled to the input. A syn... | 11/22/2011 |
| 8058931 | Enhancing an operational amplifier's capacitive load driving capability using parallel Miller feedback An apparatus for an improved operational amplifier. The disclosed improved operational amplifier comprises an operational amplifier, a first feedback circuit, and one or more secondary feedback circuits. The operational amplifier include a plurality of serially coup... | 11/15/2011 |
| 8058810 | Method and system for high efficiency, fast transient multi-channel LED driver System and method for a light emitting diode (LED) driver are disclosed. To supply an LED bus voltage to a large array of LEDs organized in multiple channels where one or more LEDs are connected in series in each channel, an LED driver includes a power converter, a ... | 11/15/2011 |
| 8049487 | Power measurement circuit A power measurement circuit and method are described. The circuit comprises: a transconductance rectifier arrangement including an input and configured to receive a periodically varying input voltage signal having an approximate 50% duty cycle; and an averaging filt... | 11/01/2011 |
| 8030907 | Accelerated response to load transients in PFM DC-to-DC converters A pulse generator circuit in a DC-to-DC converter may be configured to generate pulses that have a frequency that increases in response to increases in the load on the DC-to-DC converter. The pulse generator circuit may be configured to cause each pulse to have a co... | 10/04/2011 |
| 8022679 | Systems and methods for fast switch turn on approximating ideal diode function A switching circuit approximating the fast switching characteristics and small forward voltage drop of an ideal diode is provided. The switching circuit may include a voltage multiplier circuit, a reservoir capacitor and a pull up switch configured to be coupled to ... | 09/20/2011 |
| 8018370 | Time-multiplexed residue amplifier A system is configured and a method is provided for receiving an input ratio represented by a first input signal and a second input signal, and producing an output ratio represented by a first output signal and a second output signal. The system is constructed and t... | 09/13/2011 |
| 8017447 | Laser process for side plating of terminals A method of preparing a portion of the side of a terminal of an Integrated Circuit (IC) package for solder is disclosed. The method comprises the steps of attaching an IC die to a leadframe comprising a connecting bar, reducing the thickness of a portion of the conn... | 09/13/2011 |
| 8014412 | Power sourcing equipment having bipolar junction transistor for controlling power supply and supporting AC disconnect-detection function A power supply system for providing power to a powered device over a communication link includes a power supply device capable of supporting an AC disconnect-detect function. The power supply device has a controller, an output port coupled to the communication link,... | 09/06/2011 |
| 8013544 | Dimmer control leakage pull down using main power device in flyback converter A flyback controller may receive a chopped and rectified AC voltage from a dimmer control, each cycle of which may have a controllable off period that is substantially attenuated but not always zero due to leakage of the dimmer control, and a controllable on period ... | 09/06/2011 |
| 8004266 | Chopper stabilized bandgap reference circuit and methodology for voltage regulators A chopper stabilized bandgap voltage reference circuit comprises current mirror circuitry mirroring first and second currents into first and second networks to generate a forward diode voltage signal and a PTAT (proportional to absolute temperature) component signal... | 08/23/2011 |
| 7990120 | Circuits and methods for adjustable peak inductor current and hysteresis for burst mode in switching regulators Switching regulator circuits and methods are provided for regulating output voltage that include an adjustable minimum peak inductor current level and adjustable burst comparator hysteresis for Burst Mode operation in switching regulators. Control over minimum peak ... | 08/02/2011 |
| 7969189 | Method and system for improved phase noise in a BiCMOS clock driver System and method for a clock driver. An input taking circuit is used for receiving small-signal logic inputs. A voltage follower circuit is coupled to the input taking circuit and used to generate a set of voltage follower outputs. An output circuit is coupled to t... | 06/28/2011 |
| 7961132 | Sampling switch and controller In one embodiment, an A/D converter samples an analog input signal voltage by applying the input signal to a first capacitor terminal, while a second capacitor terminal is connected to ground via an NMOS sampling switch, to charge the capacitor to the input signal v... | 06/14/2011 |
| 7960845 | Flexible contactless wire bonding structure and methodology for semiconductor device A semiconductor device such as a field-effect transistor, improved to reduce device resistance, comprises a leadframe which includes a die paddle integral with a first set of leads and a second set of leads that is electrically isolated from the first set, a semicon... | 06/14/2011 |
| 7940091 | Bootstrapped switch for sampling voltages beyond the supply voltage Methods and apparatus for sampling an input voltage and apparatus incorporating the same are disclosed. An input voltage sampling apparatus includes a voltage sampling circuit coupled to the input voltage and configured to produce a sampled input voltage at an outpu... | 05/10/2011 |
| 7920016 | Monolithic voltage reference device with internal, multi-temperature drift data and related testing procedures A testing procedure may determine whether a monolithic voltage reference device meets a temperature drift specification. A first non-room temperature output voltage of the monolithic voltage reference device may be measured while the monolithic voltage reference dev... | 04/05/2011 |
| 7920013 | Systems and methods for oscillation suppression in switching circuits A switching circuit configured to reduce the effects of signal oscillation on the operation of the switching circuit is provided. The switching circuit may include signal oscillation and detection circuitry that suppresses control signals during a detected oscillati... | 04/05/2011 |
| 7916057 | Complex-admittance digital-to-analog converter A circuit includes a digital-to-analog converter configured to produce an analog output signal (1) proportional to a reference signal and (2) as a function of a digital input signal. The converter comprises a plurality of non-trivially complex admittances configured... | 03/29/2011 |
| 7907074 | Circuits and methods to reduce or eliminate signal-dependent modulation of a reference bias Circuits and methods that improve the performance of voltage reference driver circuits and associated analog to digital converters are provided. A voltage reference driver circuit that maintains a substantially constant output voltage when a load current is modulate... | 03/15/2011 |
| 7902665 | Semiconductor device having a suspended isolating interconnect A semiconductor device is configured to provide current and voltage isolation inside an integrated circuit package. The semiconductor device includes first and second semiconductor dies, a first isolating block positioned on the first semiconductor die, and a second... | 03/08/2011 |
| 7893665 | Peak charging current modulation for burst mode conversion During burst mode operation of a four switch buck-boost converter, the input voltage and an output voltage can be detected and a preset peak charging current threshold level can be modulated when the difference between the input voltage and output voltage is within ... | 02/22/2011 |
| 7863772 | Balancing current drawn from multiple power supply inputs using multiple-input inductors Novel techniques for balancing current drawn from multiple power supply inputs. A multiple-input inductor is coupled between the power supply inputs and the switching circuits associated with the respective power supply inputs for balancing voltages applied to each ... | 01/04/2011 |
| 7856561 | Detecting legacy powered device in power over ethernet system Novel system and methodology for detecting a Powered Device (PD) in a Power over Ethernet (PoE) system. A PD probing circuit generates a detection signal supplied to the PD and determines a PD response signal produced in response to the detection signal. Based on th... | 12/21/2010 |
| 7843178 | DC/DC converter startup with frequency ramping Control circuitry controls a boost regulator during a start-up period. The control circuitry may comprise an oscillator for generating a clock signal. The oscillator may be configured for ramping up a frequency of the clock signal in accordance with an voltage to be... | 11/30/2010 |
| 7843038 | High linearity digital variable gain amplifier Variable gain amplifiers offering high frequency response with improved linearity and reduced power dissipation are provided. An amplifier is disclosed that is constructed from a one-stage topology with multiple signal paths and compensation networks for improved li... | 11/30/2010 |
| 7834600 | Regulated power supply system and an operating method therefore A power supply system includes a regulator for receiving an input voltage and producing an output voltage, the regulator including an output device and a controller coupled to the regulator. The controller is configured to monitor at least one operating parameter of... | 11/16/2010 |
