Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8149152 | Capacitor based digital to analog converter layout design for high speed analog to digital converter A method and system for capacitor based digital to analog converter design layout for high speed analog to digital converter are provided. The method includes arranging a plurality of metal plates to form the capacitor. Each of the plurality of metal plates includes... | 04/03/2012 |
| 8106803 | Discharge digital-to-analog converter A digital-to-analog conversion circuit operates by selectively discharging members of a plurality of capacitors. Charging of the capacitors occurs during a reset period while digital-to-analog conversion occurs as the capacitors are discharged. Those capacitors that... | 01/31/2012 |
| 8059022 | Digital-to-analog converter A digital-to-analog converter (DAC) is provided. The DAC includes a positive converter, a negative converter, and a comparator for receiving outputs of the positive converter and the negative converter, comparing the outputs with a reference voltage, and generating ... | 11/15/2011 |
| 8059021 | Digital-analog converting apparatus and test apparatus Provided is a DA conversion apparatus comprising a capacitor array DA converter that outputs to an output line an output voltage corresponding to a digital value input thereto; and a load changing section that changes a size of a load capacitance connected to the ou... | 11/15/2011 |
| 8031099 | Analog/digital or digital/analog conversion system having improved linearity A digital-to-analog converter (DAC) circuit includes a least significant bit (LSB) set of capacitors, each commonly coupled to an LSB node, and a most significant bit (MSB) set of capacitors, each coupled to an MSB node. A section-coupling capacitor couples the LSB ... | 10/04/2011 |
| 8022852 | Digital-analog converter circuit This invention provides a digital-analog converter circuit capable of appropriately correcting the optical characteristics of the liquid crystals according to the change in design or the preference of the user, and achieving goals of miniaturization, cost-lowering, ... | 09/20/2011 |
| 8009074 | Digital-to-analog converter and code mapping method applied to the digital-to-analog converter A digital-to-analog converter includes an operational amplifying circuit, a switched capacitor circuit, an R-string sub-circuit, and a direct-charge transfer circuit. The operational amplifying circuit has a pair of differential input ends and a pair of differential... | 08/30/2011 |
| 7994958 | Multi-level feed-back digital-to-analog converter using a chopper voltage reference for a switched capacitor sigma-delta analog-to-digital converter A multi-bit digital-to-analog converter has a reference voltage generator generating a reference voltage with an offset voltage; a switched capacitor stage for generating a plurality of output voltages; and a switching sequencer controlling the switched capacitor st... | 08/09/2011 |
| 7969342 | Differential amplifier and data driver employing the differential amplifier Disclosed is a differential amplifier which includes first and second input terminals, an output terminal, first and second differential pairs, and first and second current sources for supplying currents to the first and second differential pairs. The first differen... | 06/28/2011 |
| 7855670 | A-to-D converter A successive approximation type A-to-D converter includes a cyclic D-to-A converter (11), a comparator (12) for comparing an analog value with an output value of the D-to-A converter (11), and memory means (13) for sequentially storing an... | 12/21/2010 |
| 7830290 | Switched capacitor digital-to-analog converter A switched capacitor digital-to-analog converter (SC-DAC) is provided. The SC-DAC of the present invention can eliminate an influence of a reference voltage source caused by a signal dependent loading at each clock cycle, so as to completely solve a harmonic distort... | 11/09/2010 |
| 7804434 | Switched-capacitor circuit In a switched-capacitor circuit such as a DAC, charges are accumulated by a plurality of sampling capacitors in dependence upon input digital data during a sampling phase; then, during a sharing phase these charges are shared with a holding capacitor which is connec... | 09/28/2010 |
| 7796074 | Digital/analogue converter, converter arrangement and display In one embodiment of the present invention, a switched capacitor digital/analog converter is provided, for example providing gamma correction in liquid crystal displays. The converter includes a plurality of conversion capacitors including first plates connected to ... | 09/14/2010 |
| 7791520 | Low power, low noise digital-to-analog converter reference circuit The present patent application comprises a digital to analog converter reference circuit, comprising a capacitor connected to a current source, a positive terminal of the capacitor connected to a first switch, the first switch electrically connecting the positive te... | 09/07/2010 |
| 7786916 | Digital to analog converter circuits and methods of operation thereof A multi-bit digital to analog converter is implemented by a switched-capacitor arrangement in which a reservoir capacitor (Cf) accumulates charge representing the desired analog output signal (Vout+/Vout−). An array of further capacitors (C0-CN) correspond ... | 08/31/2010 |
| 7786917 | Digital-to-analog converter A digital-to-analog converter is disclosed for converting a digital signal into its analog equivalent. The digital-to-analog converter includes a two switches capable of coupling circuit nodes to ground, a scaling capacitor having a capacitance value that equals a u... | 08/31/2010 |
| 7746261 | Variable gain amplifier and D/A converter A variable gain amplifier for amplifying an input voltage at a gain defined by a binary code includes: a signal input terminal; a signal output terminal; a charge division means that accumulates a charge, divides an accumulated charge, and accumulates a divided char... | 06/29/2010 |
| 7741985 | Digital to analogue converter A digital/analogue converter for converting an input n-bit digital code, where n is an integer greater than one, has an n-bit digital input and an output for connection to a load, and includes: an array of (n−1) switched capacitors; and a switching arrangement. In... | 06/22/2010 |
| 7733259 | System having a signal converter device and method of operating A system having a signal converter device, and a method for operating a system having a signal converter device is disclosed. One embodiment provides loading a capacitive device to a preparation voltage in a first operating phase, and loading the capacitive device t... | 06/08/2010 |
| 7683816 | System for displaying images A system for displaying images is provided. A capacitor type digital-to-analog converter is coupled between a first node and a second node and generates a first analog signal according to a digital signal with N bit data. An analogue buffer is coupled between the se... | 03/23/2010 |
| 7679540 | Double sampling DAC and integrator This disclosure relates to systems and methods for analog to digital conversion using delta sigma modulation. To this end, the delta sigma modulator includes a double sampling DAC and integrator and a 1-bit comparator, with reference loading insensitivity. ... | 03/16/2010 |
| 7671776 | Input sampling network that avoids undesired transient voltages Circuits, methods, and apparatus that provide sampling networks that avoid undesired transient voltages. One example provides a sampling network that includes a switch such that charge is transferred to an integrator in two separate steps instead of one. This switch... | 03/02/2010 |
| 7663525 | Digital to analog converter and conversion method A digital to analog converter including a first capacitor, a second capacitor, an operational amplifier, and a switch is disclosed. During a first period, the first capacitor stores a first voltage and the second capacitor stores a second voltage. The operational am... | 02/16/2010 |
| 7652607 | Digital to analogue converters In a digital to analogue converter, a plurality of digital inputs are used to select one of first and second binary voltage levels as binary inputs (10) to the converter. A capacitor circuit (C, 2C, . . . , 32C) is associated with each input, an... | 01/26/2010 |
| 7639167 | Differential amplifier and data driver employing the differential amplifier Disclosed is a differential amplifier which includes first and second input terminals, an output terminal, first and second differential pairs, and first and second current sources for supplying currents to the first and second differential pairs. The first differen... | 12/29/2009 |
| 7623054 | Differential amplifier, digital-to-analog converter, and display device Disclosed is a differential amplifier of a multi-level output type comprising a load circuit including a diode-connected first transistor with a source thereof connected to a power supply and a second transistor with a source thereof connected to the power supply an... | 11/24/2009 |
| 7619553 | Digital-to-analogue converter A digital-to-analogue conversion arrangement is disclosed which includes first and second groups of the same number of bi-directional bufferless digital-to-analogue converters. The output of at least one converter in each group is connected to a respective capacitiv... | 11/17/2009 |
| 7583217 | Switched capacitor type D/A converter, and drive circuit for liquid crystal display A D/A converter of switched capacitor type capable of shortening the time for D/A conversion process without increasing power consumption is provided. The D/A converter comprises capacitors Cx and Cy for receiving input voltage corresponding to the digital data and ... | 09/01/2009 |
| 7564393 | Digital to analog converter and method for digital to analog conversion A digital to analog converter includes first and second capacitors, an operational amplifier and a switching circuit. The operational amplifier includes first and second input terminals and an output terminal, the second input terminal receiving a reference voltage.... | 07/21/2009 |
| 7561089 | Digital to analogue conversion A method of Digital to Analogue conversion of an input signal Do for suppressing the effect of clock-jitter in a Delta-Sigma analogue to digital converter, or class D amplifier, comprises charging a capacitor to a reference voltage value (Vref)... | 07/14/2009 |
| 7551113 | Cyclic digital to analog converter in pipeline structure A cyclic digital to analog converter (CDAC) in a pipeline structure includes a first CDAC block and a second CDAC block. The first CDAC block receives a first digital signal and converts the first digital signal to a first analog value. The first CDAC block includes... | 06/23/2009 |
| 7492298 | System having a signal converter device and method of operating A system having a signal converter device, and a method for operating a system having a signal converter device is disclosed. One embodiment provides loading a capacitive device to a preparation voltage in a first operating phase, and loading the capacitive device t... | 02/17/2009 |
| 7443329 | Capacitive digital to analog and analog to digital converters A digital to analog converter (DAC) comprises X capacitive DACs that are connected together in series, wherein X is an integer greater than one. Each of the X capacitive DACs comprise M switches wherein M is an integer greater than one; a signal input; a signal outp... | 10/28/2008 |
| 7439896 | Capacitive digital to analog and analog to digital converters A digital-to-analog converter (DAC) comprises a capacitive DAC that comprises N first capacitances that are connected in parallel and that have first ends and second ends, wherein N is an integer greater than one, and N first switches that selectively connect a sele... | 10/21/2008 |
| 7436341 | Digital/analog converting apparatus and digital/analog converter thereof A digital/analog converting apparatus and digital/analog converter are provided. The digital/analog converter includes an operational amplifier, a first filter, a first switch, a second filter, a number of conversion units and a second switch. The operational amplif... | 10/14/2008 |
| 7425913 | Bit-adjacency capacitor-switched DAC, method, driver and display device A cyclic digital to analog converter (CDAC) includes: first and second capacitors C1 and C2; an arrangement of switches selectively controllable to connect C1 and C2 in one of at least two charging-and-sharing configurations, the first co... | 09/16/2008 |
| 7423573 | Architecture combining a continuous-time stage with a switched-capacitor stage for digital-to-analog converters and low-pass filters A digital to analog converter (DAC) includes a first continuous-time stage that receives an input signal associated with a digital signal and performs continuous-time digital-to-analog conversion operations on the input signal. The first continuous-time stage output... | 09/09/2008 |
| 7403148 | Methods and apparatus to balance reference settling in switched-capacitor pipelined digital to analog converter The linearity of switched-capacitor, pipeline digital to analog converters is improved by balancing the settling behavior of its pre-charge switches. In more detail, a switched capacitor DAC includes a number of substantially identical cells, one cell for each bit o... | 07/22/2008 |
| 7403147 | Precision capacitor array A digital capacitor array with individually shielded unit capacitors and combination binary—thermometer coded addressing is disclosed. Such a capacitor array may be part of a digitally controlled oscillator in a MEMS-based frequency reference. ... | 07/22/2008 |
| 7388533 | Multi-bit sigma-delta modulator and digital-to-analog converter with one digital-to-analog capacitor A digital-to-analog converter (DAC) for a sigma-delta modulator is provided. The DAC has a switched capacitor structure using an operational amplifier (OP amp) and performs a function exceeding 3-level using a switching method employing only one capacitor in single ... | 06/17/2008 |
