Intersil Patent Grants

Wafer level optical proximity sensors and systems including wafer level optical proximity sensors

Granted: February 14, 2017
Patent Number: 9570648
Optoelectronic devices (e.g., optical proximity sensors), methods for fabricating optoelectronic devices, and systems including optoelectronic devices, are described herein. An optoelectronic device includes a light detector die that includes a light detector sensor area. A light source die is attached to a portion of the light detector die that does not include the light detector sensor area. An opaque barrier is formed between the light detector sensor area and the light source die,…

Methods for fabricating a plurality of optoelectronic devices from a wafer that includes a plurality of light detector sensor areas

Granted: February 14, 2017
Patent Number: 9570649
Optoelectronic devices (e.g., optical proximity sensors), methods for fabricating optoelectronic devices, and systems including optoelectronic devices, are described herein. An optoelectronic device includes a light detector die that includes a light detector sensor area. A light source die is attached to a portion of the light detector die that does not include the light detector sensor area. An opaque barrier is formed between the light detector sensor area and the light source die,…

Charging system with adaptive power management

Granted: February 7, 2017
Patent Number: 9564772
An embodiment of a charger may include an input, at least one switch having a first node coupled to a reference voltage, a current sensor coupled between the input and a second node of the at least one switch, an output coupled to a third node of the at least one switch, and a charge controller coupled to the input to determine an input voltage, to the current sensor to determine an input current and to control inputs of the at least one switch. The at least one switch may be responsive…

Audio frequency deadband system and method for switch mode regulators operating in discontinuous conduction mode

Granted: January 17, 2017
Patent Number: 9548659
A controller for controlling operation of a switching regulator including a modulator, a discontinuous conduction mode (DCM) controller, an audible DCM (ADCM) controller, and a sub-sonic discontinuous conduction mode (SBDCM) controller. The modulator generally operates in a continuous conduction mode. The DCM controller modifies operation to DCM during low loads. The ADCM controller detects when the switching frequency is less than a super-sonic frequency threshold and modifies operation…

Lead frame having a perimeter recess within periphery of component terminal

Granted: January 3, 2017
Patent Number: 9536852
Embodiments described herein relate to a packaged circuit including a lead frame having at least one recess pattern on an internal surface thereof. The at least one recess pattern includes a perimeter recess that defines a perimeter around one or more raised surfaces. The packaged circuit also includes a component having one or more terminals. One of the terminals is mounted to the one or more raised surfaces such that the terminal covers the perimeter recess, wherein the perimeter…

Body contact layouts for semiconductor structures

Granted: January 3, 2017
Patent Number: 9536952
Body contact layouts for semiconductor structures are disclosed. In at least one exemplary embodiment, a semiconductor structure comprises: a plurality of gates disposed on a semiconductor layer, each gate extending parallel to a y-axis in a coordinate space; a source region disposed between two of the plurality of gates; a plurality of body contacts disposed in each source region; and wherein a portion of each source region, adjacent to the gate, has a width extending parallel to the…

Back-to-back stacked dies

Granted: December 20, 2016
Patent Number: 9524957
Embodiments disclosed herein provide for a circuit including first die having an active side and a backside, wherein the first die is flip-chip mounted to a carrier. The circuit also includes a second die stacked on the backside of the first die, wherein the second die is stacked on the first die such that a backside of the second die is facing the backside of the first die and an active side of the second die faces away from the first die.

Current pulse count control in a voltage regulator

Granted: December 6, 2016
Patent Number: 9515556
A method of regulating voltage with a switching regulator is disclosed. The method includes sensing an output voltage provided by the regulator. If the output voltage drops below a low voltage threshold, a burst of one or more current pulses is provided. If the output voltage raises above a high voltage threshold during the burst, discontinuing the burst of current pulses. The method includes counting a number of the one or more current pulses in the burst, and comparing the number of…

Adjusting a current threshold of a power supply such that an output ripple voltage is within a set range

Granted: November 22, 2016
Patent Number: 9502974
In an embodiment, a power-supply controller includes switching circuitry and an adjuster circuit. The switching circuitry is configured to cause a charging current to flow until the charging current has a predetermined relationship to a threshold, and to cause a discharging current to flow to an output node that carries an output voltage after the charging current. And the adjuster circuit is configured to adjust the threshold such that a ripple voltage superimposed on the output voltage…

Scanning projectors that use guard bands to reduce color shifts, and methods and controllers for use therewith

Granted: November 22, 2016
Patent Number: 9503701
A scanning projector system includes a controller, a driver and one or more micro-mirror(s). The controller produces first, second and third pixel data in dependence on a video signal. The driver drives first, second and third light emitting elements in dependence on the first, second and third pixel data produced by the controller, to thereby emit light of first, second and third colors. The micro-mirror(s) project an image in dependence on light beams produced in dependence on the…

LED driver with adaptive dynamic headroom voltage control

Granted: November 8, 2016
Patent Number: 9491822
A multi-channel LED driver includes a plurality of linear current regulators, each connected to a bottom of a string of series connected LEDs of a multi-channel LED that controls a bias current and the string of series connected LEDs responsive to an LED bias reference voltage. A dynamic headroom regulation voltage control circuit monitors the headroom regulation voltage at the bottom of each string of the series connected LEDs in the multi-channel LED and generates a reference voltage…

I2C address translation

Granted: October 25, 2016
Patent Number: 9477634
Embodiments of the present invention relate to systems, devices and methods for translating I2C addresses. In accordance with an embodiment, a method for translating an I2C address includes receiving an original I2C address from a first I2C compatible device via an I2C-bus to which the first I2C compatible device is connected. The method also includes translating the original I2C address to a translated I2C address, and outputting the translated I2C address to a second I2C compatible…

Reduced-noise reference voltage platform for a voltage converter device

Granted: October 25, 2016
Patent Number: 9478442
An electronic system, a reduced-noise reference voltage platform for a voltage converter device, and a method of manufacture of a reduced-noise reference voltage platform for a voltage converter device are disclosed. For example, the reduced-noise reference voltage (e.g., ground) platform includes a first conductor unit, a second conductor unit, and an insulator unit interposed between a first surface of the first conductor unit and a first surface of the second conductor unit. The…

Current synthesizer correction

Granted: August 16, 2016
Patent Number: 9419627
An adjustable current-synthesizer may generate synthesized current representative of an actual current, according to a model of a circuit that produces the actual current. The current synthesizer may under-sample a current sense signal derived from the actual current to obtain a few samples of the actual current, which are then used to adjust the synthesized current, thereby ensuring accuracy of the synthesized current. Sample values of the actual current are compared with corresponding…

System, circuit and method for converting a differential voltage signal including a high common mode voltage component to a ground referenced signal for battery voltage managment

Granted: August 16, 2016
Patent Number: 9419644
A system, circuit and method for converting a differential voltage signal including a high common mode voltage component to a ground referenced signal are disclosed. For example, a circuit for converting a differential voltage signal including a high common mode voltage component to a ground referenced signal is disclosed. The circuit includes a comparator configured to receive a differential voltage signal including a high common mode voltage component, and output a digital signal…

Injection locked phasing for a peak-valley multiphase regulator

Granted: July 26, 2016
Patent Number: 9401639
A system and method capable of injection locking the phases of a peak-valley multiphase regulator includes comparing an output voltage error signal with a ramp control signal and providing a corresponding slope reset signal, using transitions of the slope reset signal to develop a equally spaced high side ramp signals and equally spaced low side ramp signals, and injecting a corresponding one of the high side signals and a corresponding one of the low side ramp signals into each of the…

System and method for cell balancing and charging using a serially coupled inductor and capacitor

Granted: July 19, 2016
Patent Number: 9397508
An apparatus for charging a plurality of series connected battery cells, includes a first and second input terminals for providing a charging voltage to the plurality of series connected battery cell. A transformer includes a primary side associated with the charging voltage and a secondary side includes a plurality of portions. Each of the plurality of portions is connected across at least one of the plurality of series connected battery cell. A switch in series between each of the…

Semiconductor structures for enhanced transient response in low dropout (LDO) voltage regulators

Granted: July 5, 2016
Patent Number: 9383618
Systems, semiconductor structures, electronic circuits and methods for enhanced transient response in Low Dropout (LDO) voltage regulators are disclosed. For example, a semiconductor structure for enhanced transient response in an LDO voltage regulator is disclosed, which includes a first current mirror circuit coupled to an input connection and an output connection of the LDO voltage regulator, a second current mirror circuit coupled to the input connection of the LDO voltage regulator.…

Fast recovery scheme of transconductance gain for folded cascode amplifier

Granted: July 5, 2016
Patent Number: 9385658
A folded cascode amplifier (FCA) including cascode stages coupled in a stacked cascode configuration, an input stage, and a switch circuit. The stages may include first and second P-type stages and first and second N-type stages, in which the first N-type stage and the input stage receive first and second bias voltages, respectively. The switch circuit couples a first cascode bias voltage to the second P-type stage and couples a second cascode bias voltage to the first N-type stage in a…

Hysteretic controlled buck-boost converter

Granted: June 28, 2016
Patent Number: RE46045
An apparatus includes a buck boost converter for generating a regulated output voltage responsive to an input voltage. The buck boost converter includes an inductor, a first pair of switching transistors responsive to a first PWM signal and a second pair of switching transistors responsive to a second PWM signal. An error amplifier generates an error voltage responsive to the regulated output voltage and a reference voltage. A control circuit generates the first PWM signal and the second…