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 |
| 8188899 | Un-buffered segmented R-DAC with switch current reduction An resistor string digital-to-analog converter (DAC) that includes elements to compensate for resistor ladder loading, and/or to provide compensation for loading such as via switch current cancellation. The approach reduces output voltage sensitivity to switch resis... | 05/29/2012 |
| 8179295 | Self-calibrated current source and DAC using the same and operation method thereof A background self-calibrated DAC is presented. A virtual-short theory, applicable to input/output terminals of an operational amplifier, is periodically employed so as to self-calibrate a current source serially connected with an equivalent resistor, and the DAC usi... | 05/15/2012 |
| 8144044 | D/A converter including higher-order resistor string A resistor string type D/A converter in accordance with an exemplary aspect of the present invention includes a resistor string, switches, a higher-order decoder, a lower-order decoder, and a conversion unit. The resistor string generates a plurality of analog volta... | 03/27/2012 |
| 8111184 | Digital-to-analog converting circuit, data driver and display device A m-bit DAC outputs a voltage that is the result of interpolation from two reference voltages. The two reference voltages are selected, inclusive of redundant selection of the same reference voltage (inclusive also of reference voltages other than adjacent voltages)... | 02/07/2012 |
| 8063808 | Multi-input operational amplifier circuit, digital/analog converter using same, and driver for display device using same A multi-input operational amplifier circuit operable with a high degree of accuracy and in a small area, a D/A converter using the multi-input operational amplifier circuit, and a drive circuit or driver for a display device, using the D/A converter. In embodiments ... | 11/22/2011 |
| 7986255 | High resolution overlapping bit segmented DAC A controller receives an M-bit input and generates, in response, an S-bit upper range binary data feeding S-bit high range DAC and an R-bit lower range data feeding an R-bit low range DAC. The controller detects transition points in the M-bit input and in response, ... | 07/26/2011 |
| 7978110 | Digital-to-analog converter A system for converting a digital signal to an analog signal is provided. The present invention provides a digital-to-analog converter (DAC) that can convert a large bit value digital signal to a corresponding analog signal. The digital-to-analog converter includes ... | 07/12/2011 |
| 7956786 | Digital-to-analogue converter An N-bit DAC comprises a main DAC circuit having main nodes on which analogue voltages are produced of progressively increasing values in steps of the value of one MSB value, and a sub-DAC circuit having secondary nodes on which analogue voltages are produced of pro... | 06/07/2011 |
| 7948418 | Digital-to-analog conversion circuit and column driver including the same A digital-to-analog conversion circuit includes a digital-to-analog converter and a buffer amplifier. The digital-to-analog converter receives upper bits of digital data and a plurality of analog voltages and is configured to output two adjacent analog voltages of t... | 05/24/2011 |
| 7936294 | Digital-to-analog converter, analog-to-digital converter, and semiconductor device A DA conversion device includes the following elements. A higher-bit current source cell portion includes uniformly weighted higher-bit current source cells to generate an identical constant current. A lower-bit current source cell portion includes a lower-bit curre... | 05/03/2011 |
| 7928881 | Direct digital frequency synthesizer using variable sine wave-weighted digital to analog converter and synthesizing method thereof The present invention relates to a direct digital frequency synthesizer using a variable sine wave-weighted digital to analog converter with improved size and efficiency and a synthesizing method thereof. The direct digital frequency synthesizer and the synthesizing... | 04/19/2011 |
| 7916059 | Digital-analog conversion device and method for the digital-analog conversion A digital-analog conversion circuit, a method for the digital-analog conversion and a source driver are disclosed. A digital-analog conversion circuit may include a latch for storing N bit digital data therein, and a digital-analog converter, for performing a first ... | 03/29/2011 |
| 7859445 | Digital to analog converter An embodiment of a digital to analog converter (DAC) with two outputs is provided. The DAC is controlled by an n-bits input signal and comprises a reference voltage circuit generating (2n+1) reference voltages, a first switch array and a second switch array. The fir... | 12/28/2010 |
| 7847718 | Digital-to-analog converter, data driver and display device using same A digital-to-analog converter including includes a decoder which receives m (where m>=4 holds) reference voltages having voltage values that differ from one another, and selects and outputs n (where n>=3 holds) identical or different voltages from among the m refere... | 12/07/2010 |
| 7764212 | Driving apparatus for display A driving apparatus for a display is provided. The driving apparatus for a display comprises a reference voltage generator, a digital-to-analog converter, and an output unit. The reference voltage generator generates a plurality of reference voltages, and receives a... | 07/27/2010 |
| 7733258 | Data conversion circuitry for converting analog signals to digital signals and vice-versa and method therefor A data converter for converting analog signals to digital signals, or for converting digital signals to analog signals is provided. In one embodiment, a production self-test is provided. In one embodiment, a high-speed lower-resolution method or mode for a data conv... | 06/08/2010 |
| 7675450 | Digital-to-analog converter (DAC) for high frequency and high resolution environments A digital-to-analog converter (DAC) configured to operate in high frequency and/or high resolution environments. The DAC has a segmented architecture comprising one or more least significant bit (LSB) thermometer sub-converters and one or more most significant bit (... | 03/09/2010 |
| 7671775 | Digital-to-analog converter A converter of 6-bit input includes a reference voltage generating circuit generating 17 reference voltages, a first switch circuit having 19 switch pairs each including MOS transistors for selecting two adjacent reference voltages in accordance with the four most s... | 03/02/2010 |
| 7646321 | Digital/analog converter Provided is a digital/analog converter including a voltage dividing unit that includes a plurality of voltage dividing elements and divides a reference voltage by voltage division; a first decoder that selects a plurality of voltages among the voltages divided by th... | 01/12/2010 |
| 7639166 | D/A converter circuit A multi-bit D/A converter circuit that prevents a bit inversion and requires a reduced layout area is offered. A first switching circuit is provided in order to select a pair of analog voltages generated across one of resistors in a first resistor string. The select... | 12/29/2009 |
| 7609191 | Digital/analog converting driver and method A digital/analog converting driver and a digital/analog converting method, in which the digital/analog converting driver converts digital data having M+N (M and N are integers) bits into an analog voltage and includes a first converting unit, a second converting uni... | 10/27/2009 |
| 7602326 | Digital-to-analog converter having resistor string with ranges to reduce circuit elements An analog-to-digital converter has a resistor string that generates a series of voltages. An upper selector selects voltages at the upper end of the series. A lower selector selects voltages at the lower end of the series. A pair of midrange selectors select a pair ... | 10/13/2009 |
| 7595746 | Interpolation digital-to-analog converter A digital-to-analog converter (DAC) includes coarse interpolation DACs configured to produce a current range based on an input digital signal, and fine interpolation DACs configured to produce an output current that is based on an input digital signal and that is wi... | 09/29/2009 |
| 7595747 | Digital-to-analog converter, and method thereof A digital-to-analog converter (DAC) and a digital-to-analog converting method are provided. The DAC includes a first capacitor, an operation amplifier having a first input terminal connected to the first capacitor, a second input terminal, and an output terminal, wh... | 09/29/2009 |
| 7592940 | Digital-to-analog converter and digital-to-analog conversion method thereof A digital-to-analog converter (DAC) can minimize the increase of an area caused by increase of number of bits. The DAC includes a coarse resistor-string digital-to-analog conversion unit for selectively outputting 2N-level analog voltages in response to u... | 09/22/2009 |
| 7573411 | Digital-to-analog converter, display panel driver having the same, and digital-to-analog converting method A digital-to-analog converter outputting an analog data voltage corresponding to n-bit data, includes a chopping amplification unit adapted to receive an upper bit voltage corresponding to upper x bits of the n-bit data and a lower bit voltage corresponding to lower... | 08/11/2009 |
| 7535397 | Digital-to-analog converter and the method thereof A digital-to-analog converter (DAC) is provided for converting an (X+Y)-bit input word, which includes an X-bit MSB subword and a Y-bit LSB subword, into a current signal. The DAC has an X-bit voltage DAC section and a Y-bit current DAC section. The X-bit voltage DA... | 05/19/2009 |
| 7532140 | Gradient insensitive split-core digital to analog converter Digital to analog converter circuits and methods are provided for producing an analog output voltage indicative of a digital input signal with at least partial insensitivity to error gradients. Described are split-core resistive elements, which include a plurality o... | 05/12/2009 |
| 7522082 | Digital-to-analog converter, analog-to-digital converter, and semiconductor device A DA conversion device includes the following elements. A higher-bit current source cell portion includes uniformly weighted higher-bit current source cells to generate an identical constant current. A lower-bit current source cell portion includes a lower-bit curre... | 04/21/2009 |
| 7511650 | Digital to analog converter A digital-to-analog converter is provided. The DAC includes a R-string section, a first DAC section, a second DAC section, a multiplexer, and an operational amplifier. The R-string section provides a first group of voltage levels and a second group of voltage levels... | 03/31/2009 |
| 7501970 | Digital to analog converter architecture and method having low switch count and small output impedance A digital to analog converter includes a coarse resolution resistor circuit (11) coupled between a first voltage (Vin) and an intermediate voltage (V0) to produce coarse resolution node voltages (V0, . . . V240), and also includes a fine ... | 03/10/2009 |
| 7474245 | Digital-to-analog converter A digital-to-analog converter outputting an output analog voltage according to an N-bit digital signal is provided. The digital-to-analog converter includes a first and a second resistor strings, a first and a second select units. The first resistor string is connec... | 01/06/2009 |
| 7456773 | Pseudo-differential class-AB digital-to-analog converter with code dependent DC current A digital-to-analog converter, RF transmit channel and method, for converting a digital signal of N bits having a set M of most significant bits and a set L of least significant bits to an analog signal, are disclosed. The digital signal defines a set of coded value... | 11/25/2008 |
| 7453386 | Digital to analog converter and source driver A digital to analog converter (DAC) converting digital data into a corresponding analog voltage is disclosed. The digital data includes upper bit data and lower bit data and the DAC includes; a first resistor circuit dividing first and second reference voltages to o... | 11/18/2008 |
| 7453385 | D/A converter A D/A converter includes: an (N−1)-stage reference resistor group; an N-stage reference resistor group; inter-stage op-amps applying a divided voltage outputted from voltage taps of the (N−1)-stage reference resistor group, across both ends of the N-stage refere... | 11/18/2008 |
| 7443326 | Digital input signals constructor providing analog representation thereof A digital to analog waveform converter featuring a DSP, discrete output devices, and Multi Input Multi Output (MIMO) device, wherein the MIMO device includes low accuracy components featuring high speed and low power. ... | 10/28/2008 |
| 7443323 | Calibrating a digital-to-analog converter Methods and corresponding systems for calibrating a digital-to-analog converter include selecting first and second code regions in the digital-to-analog converter, wherein the first and second code regions are separated by a boundary. Thereafter a waveform sequence ... | 10/28/2008 |
| 7432839 | ADC with logarithmic response and methods for controlling RF power levels Embodiments of an analog-to-digital converter (ADC) and methods for controlling RF power levels are generally described herein. Other embodiments may be described and claimed. In some embodiments, the ADC includes an internal-reference digital-to-analog converter (D... | 10/07/2008 |
| 7425912 | Digital-to-analog converter with controlled buffered inputs A DAC circuit is provided which implements a buffered DAC input where the buffer is provided by a differential amplifier whose supply rail is correlated with the input to the DAC. In this way it is possible to buffer the circuitry using amplifiers whose open loop ga... | 09/16/2008 |
| 7423259 | Mass spectrometer and method for enhancing dynamic range A mass spectrometer comprises an ion detector, a first amplifier, a second amplifier, and a spectra combiner. The ion detector is configured to generate an analog signal indicative of ions detected by the ion detector. The first amplifier is configured to amplify th... | 09/09/2008 |
