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| Number | Title | Issue Date |
| 8183903 | Signal interpolation methods and circuits An interpolation circuit for comparing an input voltage signal with an interpolated reference signal derived from a first reference voltage signal and a second reference voltage signal may include a transconductive circuit configured to generate a first differential... | 05/22/2012 |
| 8159052 | Apparatus and method for a chip assembly including a frequency extending device A chip assembly includes a chip, a paddle, an interface layer, a frequency extending device, and lands. The chip has contacts. The interface layer is disposed between the chip and the paddle. The frequency extending device has at least a conductive layer and a diele... | 04/17/2012 |
| 8111091 | High speed track and hold circuit Examples of systems and methods are provided for tracking-and-holding an input signal. The system may produce a pair of differential voltage outputs responsive to a pair of differential voltage inputs. The system may couple, in response to a clock signal, an input a... | 02/07/2012 |
| 8093714 | Chip assembly with chip-scale packaging A chip assembly may comprise a substrate having a top surface and a bottom surface. The chip assembly may comprise a first die having a circuit surface and a connecting surface, the circuit surface comprising one or more integrated circuits. The chip assembly may co... | 01/10/2012 |
| 8022854 | Thermometer code transcoding and encoding methods and systems Examples of systems and methods are provided for generating an output signal having an output code having less number of bits compared to an input signal having a thermometer code representation. The system may partition the input code bits into non-overlapping clus... | 09/20/2011 |
| 8009011 | Electrically adjustable resistor An electrically adjustable resistor comprises a resistive polysilicon layer dielectrically isolated from one or more doped semiconducting layers. A tunable voltage is applied to the doped semiconducting layers, causing the resistance of the polysilicon layer to vary... | 08/30/2011 |
| 7973689 | Bandpass multi-bit sigma-delta analog to digital conversion Examples of a system and method for sigma-delta analog-to-digital conversion of an electrical input signal are disclosed. A bandpass-filtered signal based on an electrical input signal and an analog feedback signal may be provided. A multi-bit digital representation... | 07/05/2011 |
| 7933354 | Encoding and decoding architecture and method for pipelining encoded data or pipelining with a look-ahead strategy An encoding and/or decoding communication system comprises a framer interface, an encoder, a multiplexer, an output driver, and a clock multiplier unit (CMU). The encoder includes an input latch circuitry stage; an output latch circuitry stage; an intermediate latch... | 04/26/2011 |
| 7826542 | Channelization filter communication systems and methods therefor A channelization filter communication system comprises: a channelization filtering system, a calibration unit, amplifiers, communication channel frequency converters and a baseband processor. The channelization filtering system includes a selector input configured t... | 11/02/2010 |
| 7791415 | Fractional-N synthesized chirp generator A fractional-N synthesized chirp generator includes a fractional-N synthesizer and a digital ramp synthesizer. The fractional-N synthesizer has a frequency synthesizer and a sigma-delta modulator module. The fractional-N synthesizer is configured to receive a refere... | 09/07/2010 |
| 7590151 | Method and apparatus for aligning time references when separated by an unreliable data packet network A time control mechanism accepts samples of time (true or otherwise) over a network, and enables dynamic compensation for random delays of the network in order to maintain the output of a slave clock that the time control mechanism controls within required bounds re... | 09/15/2009 |
| 7580030 | Sensor for capacitive touch pad pointing device The topology and the shape of sensing electrodes (4, 31) on the Capacity Touch Pad Sensor that allow sensing of small targets are disclosed. Sensor construction utilizes common PCB manufacture technique. ... | 08/25/2009 |
| 7508182 | Method and apparatus for improved current mode control for large conversion ratio synchronous buck converter with lossless current sense Methods and apparatuses are provided for monitoring an inductor output current delivered to a load by a power converter. For example, there is provided an apparatus comprising: at least one power switch operatively coupled to an input voltage source; an output induc... | 03/24/2009 |
| 7388357 | Method and apparatus for reducing input supply ripple in a DC-DC switching converter A power system comprising a front end regulator coupled to an input supply voltage (Vin) and providing a regulated input supply voltage (Vbp). The front end regulator compares the input supply voltage (Vin) and the regulated input supply voltage (Vbp) and maintains ... | 06/17/2008 |
| 7268527 | Method and apparatus for determining load current in a CPU core voltage regulator An apparatus and method for measuring output current and power in real-time is provided for a CPU core powered by a DC-to-DC power converter having active voltage positioning. In an embodiment of the invention, a switched mode power converter comprises at least one ... | 09/11/2007 |
| 7265504 | High efficiency power supply for LED lighting applications A power supply for plural loads coupled in parallel comprises a voltage regulator, a plurality of current regulators, and an error control circuit. The voltage regulator provides a common output voltage to the plural loads. The voltage regulator comprises a sensor c... | 09/04/2007 |
| 7154304 | Enhanced phase and frequency detector that improves performance in the presence of a failing clock A system and method of reducing the pulse width differential in a phase frequency detector (PFD) is provided. In a first embodiment, a PFD is construed using a plurality of flip-flops (or clocking devices) and a plurality of logic gates. A first set of flip-flops ar... | 12/26/2006 |
| 7154260 | Precision measurement unit having voltage and/or current clamp power down upon setting reversal A precision measurement unit (PMU) includes a force amplifier selectively providing either a forcing voltage or a forcing current to a device under test via an output force terminal. A low limit voltage clamp and a high limit voltage clamp are operatively coupled to... | 12/26/2006 |
| 7139179 | Switching mode power converter having secondary side bias generating and driving circuit to provide synchronous rectification and active clamp A switched mode power converter includes a transformer having a primary winding, a secondary winding, and a bias winding. A primary side power switch is coupled to the primary winding and is adapted to periodically apply an input voltage to the primary winding. An o... | 11/21/2006 |
| 7116563 | Dual mode over-current protection for switching mode power converter A control circuit for a switched mode power converter is adapted to receive a current sense signal reflecting the output current of the power converter and a feedback signal reflecting the output voltage of the power converter. The control circuit includes a first o... | 10/03/2006 |
| 7064575 | Method and system for adaptively controlling output driver impedance An adaptive output driver circuit utilizes an initial point matched impedance model to match the impedance of an output driver to the transmission line and produce an initial step voltage into the transmission line that is half of the desired final voltage. The driv... | 06/20/2006 |
| 7042744 | Diode stack Hermetically sealed high-voltage assemblies are made up of series-connected diodes. Exposed tabs bonding adjacent diodes allow for greater thermal dissipation than previous products. This allows higher current-carrying capacity especially if used in oil. ... | 05/09/2006 |
| 7039148 | Phase detector and signal locking system controller A phase detector and signal locking system controller for use in a digital phase-locked loop (PLL) application includes a first and a second phase detector where the first phase detector result is used to control the initial pull-in and the second phase detector is ... | 05/02/2006 |
| 6918049 | Method and apparatus for controlling the phase of the clock output of a digital clock A clock synthesizer produces an output clock that has a programmable phase offset from the input clock. The clock synthesizer includes an accumulator and an offset adder. The output clock is derived from the offset adder. The offset adder receives a value derived fr... | 07/12/2005 |
| 6917316 | Digital adjustment of gain and offset for digital to analog converters Improved digital to analog converter (DAC) circuitry incorporating the ability to utilize a single DAC to generate either voltage or current outputs, and the ability to digitally adjust the gain and offset. Previous digital to analog circuitry has been limited to a ... | 07/12/2005 |
| 6903986 | Method and apparatus for improving the reliability of the reading of integrated circuit fuses A system is provided for use with an on-chip fuse. If the fuse (40) is to be blown, the system blows the fuse, then performs a test read by comparing it with a larger-than-normal reference resistance (41, 42). If, even using the larger-than-normal refe... | 06/07/2005 |
| 6828775 | High-impedance mode for precision measurement unit A high-impedance mode is provided for an output of a precision measurement unit (PMU). The PMU includes an output amplifier that provides a forcing voltage or current to a device under test. When the high-impedance mode is activated, the output amplifier is decouple... | 12/07/2004 |
| 6816022 | Oscillator system and method for starting and stopping an oscillator An improved oscillator system has a control logic block which has an input from an external device to which clock is being provided. The input controls a counter which counts cycles from the oscillator. If some predetermined number of cycles has passed in the absenc... | 11/09/2004 |
| 6813170 | Multiple output power supply having soft start protection for load over-current or short circuit conditions A protection circuit for a multiple output switching mode power converter protects against an over-current or short circuit failure condition. The protection circuit activates the soft-start circuit of the PWM control circuit upon detection of the over-current or sh... | 11/02/2004 |
| RE38608 | Low-voltage punch-through transient suppressor employing a dual-base structure A punch-through diode transient suppression device has a base region of varying doping concentration to improve leakage and clamping characteristics. The punch-through diode includes a first region comprising an n+ region, a second region comprising a p− region ab... | 10/05/2004 |
| 6788554 | Switched mode power converter having synchronous rectification and secondary side post regulation A switched mode power converter includes a transformer having a primary winding and at least one secondary winding, a primary side power switch coupled to the primary winding and adapted to periodically apply an input voltage to the primary winding, and an output fi... | 09/07/2004 |
| 6714426 | Multiple-phase, multi-module power supply system for high frequency operation A multiple-phase power converter comprises a non-isolated, double-ended transformer having a plurality of windings, a high-side switch portion, a low-side switch portion, an output portion, and a controller. The high-side switch portion includes a first power switch... | 03/30/2004 |
| 6703812 | Power converter having improved step down response for low duty cycle operation A power converter comprises at least one output inductor having an input and output terminal. At least one first switch circuit is connected to the input terminal of the output inductor to alternately connect the input terminal to at least one voltage sou... | 03/09/2004 |
| 6668180 | Signaling method and apparatus with a host and human input device In the exemplary system, a "software" handshake is employed to signal from the keyboard when it is desired to "wake up" the host. After the handshake is completed, a key scan code is communicated to the host. Thereafter the host may revert to "sleep" mode... | 12/23/2003 |
| 6646478 | Method and apparatus for increasing capture range and jitter tolerance in phase detection circuits A phase detection system allows the capture range, lock range and jitter tolerance to be extended beyond &#b1;360°. The capture range for the phase detection system may be extended in programmable amounts up to several thousand clock cycles or can be set... | 11/11/2003 |
| 6518725 | Charge balancing system The problem of battery failure due to failure of one cell in a rechargeable battery, and the related problem of inefficient use of a battery over its dynamic range due to differences between the performance of cells in a battery, are addresses by providin... | 02/11/2003 |
| 6512471 | Intentionally non-monotonic digital-to-analog converter A digital-to-analog converter comprises capacitor stack (61, 62), the common point of which is the output of the converter. Digitally controlled switches (66-70), which may be discrete outputs from a microcontroller, selectively apply first or second pote... | 01/28/2003 |
| 6486871 | Pointing device with Z-axis functionality and reduced component count Apparatus and method are disclosed for receiving human input by means of a pointing device, typically a strain gauge. Three dimensions of input are received from a resistor bridge by means of four contact points to the strain gauge. A sequence of excitati... | 11/26/2002 |
| 6441597 | Method and apparatus for sensing output inductor current in a DC-to-DC power converter A current sense circuit for a DC-to-DC power converter accurately senses the output inductor current without adversely affecting efficiency of the power converter. The current sense circuit produces a current sense signal having amplitude sufficiently abo... | 08/27/2002 |
