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US20130336143 |
I-Q MISMATCH CALIBRATION AND METHOD
Techniques are provided for reducing mismatch between the in-phase (I) and quadrature (Q) channels of a communications transmitter or receiver. In an exemplary embodiment, separate voltages are... |
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US20080232523 |
Method And System For Mixing A Plurality Of Audio Sources In An FM Transmitter
A plurality of digital audio signals from a plurality of sources utilizing different clocks may be processed and transmitted via an FM transmitter. The plurality of signals may have different... |
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US20130328707 |
I-Q MISMATCH CALIBRATION AND METHOD
Techniques are provided for reducing mismatch between the in-phase (I) and quadrature (Q) channels of a communications transmitter or receiver. In an exemplary embodiment, separate voltages are... |
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US20080272943 |
ANALOG-TO-DIGITAL CONVERSION CONTROLLER, OPTICAL RECEIVING DEVICE, OPTICAL RECEIVING METHOD, AND WAVEFORM-DISTORTION COMPENSATING DEVICE
An optical receiving device of the present invention receives optical signals from an optical transmitting device which uses a modulation format wherein an optical intensity waveform of each... |
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US20120306677 |
SYSTEM AND METHOD TO MODIFY A METADATA PARAMETER
A method includes receiving digital audio data at an audio adjustment system. The method includes converting a portion of the digital audio data to an analog audio signal with a digital-to-analog... |
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US20060114138 |
Method for calibrating a digital-to-analog converter and a digital-to-analog converter
The invention describes a method for digitally calibrating a segmented current-steering D/A-converter. One embodiment of the present invention is a 14-bit DAC, where 6 MSB's are converted with two... |
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US20070001886 |
Integrated circuit device and electronic instrument
An integrated circuit device includes a driver macrocell in which a plurality of circuit blocks are integrated into a macrocell. The driver macrocell includes a data driver block DB for driving... |
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US20090115769 |
DA converter, data line driving circuit, electro-optical device, driving method thereof, and electronic apparatus
To simplify s configuration of a current mode DA converter. A data line driving circuit includes DA converting units U1 to Un. Each DA converting unit U1 to Un a voltage DA converting circuit for... |
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US20090052556 |
FREQUENCY INTERLEAVING METHOD FOR WIDEBAND SIGNAL GENERATION
Wideband signal generation systems and methods are provided which employ frequency interleaving for generating wideband signals. A general method increases a digitally synthesized signal's... |
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US20080181337 |
Spur and Distortion Management Techniques for an RF Receiver
A receiver (1800) includes a mixing digital-to-analog converter (DAC) (1807), a direct digital frequency synthesizer (DDFS) (1848), a first power detector (1826), and a first control circuit... |
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US20130106636 |
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... |
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US20080239106 |
REDUNDANT-BIT-ADDED DIGITAL-ANALOG CONVERTER, ANALOG-DIGITAL CONVERTER, AND IMAGE SENSOR
A redundant-bit-added digital-analog converter has a first input terminal and a second input terminal and outputs a ramp voltage obtained by quantizing a voltage difference between a first... |
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US20080231487 |
DIGITAL-TO-ANALOG CONVERTER AND METHOD OF DIGITAL-TO-ANALOG CONVERSION
A digital-to-analog convertor, and a methods of digital-to-analog conversion employ first and second PWM generators providing first and second PWM signals, said first PWM generator being... |
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US20050110666 |
Current driving apparatus and method for fabricating the same
In a current driving apparatus for driving a display panel, allocation of some of transistors used for constructing current sources is exchanged between first and second DA converter circuits. For... |
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US20100329482 |
AUDIO DIGITAL TO ANALOG CONVERTER AND AUDIO PROCESSING APPARATUS INCLUDING THE SAME
An audio DAC includes a delta/sigma modulator (DSM), a pulse width modulator (PWM) and an output unit. The DSM delta-sigma modulates an over-sampled digital signal to generate a multi-bit... |
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US20090058475 |
APPARATUS AND METHOD FOR DIGITAL FREQUENCY UP-CONVERSION
Disclosed is an apparatus and a method for up-converting frequencies of digital Intermediate Frequency (IF) signals input through at least two paths, and then outputting IF signals to which at... |
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US20070096966 |
Data driver and organic light emitting display device using the same
A data driver and an organic light emitting display device using the same, in which power consumption and a layout area thereof are reduced. The data driver includes: a shift registering part... |
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US20070115160 |
Self-referenced differential decoding of analog baseband signals
Apparatus and methods of differentially decoding analog baseband signals are described. In one aspect, a wireless communication apparatus includes a baseband filtering stage and a differential... |
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US20100134336 |
CODEC PLATFORM APPARATUS
A codec platform apparatus which can perform encoding or decoding regardless of a sampling frequency supported by a codec platform is provided. The codec platform apparatus includes an... |
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US20090051676 |
DRIVING APPARATUS FOR DISPLAY
A driving apparatus for a display is provided. The driving apparatus for a display comprises: a digital/analog converter for receiving an input voltage lower than a source voltage used in a buffer... |
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US20060244647 |
Digital-to-analog converter and successive approximation type analog-to-digital converter utilizing the same
In a digital-to-analog (D-A) converter, a plurality of respectively weighted capacitances are configured such that one ends of them are connected to an input terminal of a comparator and the other... |
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US20140104088 |
DIFFERENTIAL SWITCH DRIVE CIRCUIT AND CURRENT STEERING DIGITAL-TO-ANALOG CONVERTER
A differential switch drive circuit includes a current source, a current control circuit including a pair of transistors having a pair of differential input terminals, a pair of differential... |
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US20070252740 |
Digital television receiver and method for processing a digital television signal
A method of processing a digital television signal in a digital television receiver, the method includes receiving a digital television signal including a streaming data table carrying one or more... |
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US20060103563 |
Data driver, flat panel display and data converting method
A data driver in a flat panel display comprises: a latch for receiving a data signal in series, and for outputting the data signal in parallel; and a digital-to-analog (D/A) converter for... |
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US20120176263 |
CURRENT SWITCH CIRCUIT AND DA CONVERTER
According to one embodiment, a first switch transistor and a second switch transistor convert an input current to a first current and a second current by performing a switching operation on the... |
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US20100268516 |
SIGNAL SIMULATION APPARATUS AND METHOD
The present invention relates to a method of simulating an initial component of a signal to approximate a component of a reference signal, the method characterised by the steps of; i) generating a... |
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US20070132620 |
ARRAY SUBSTRATE AND DISPLAY DEVICE
An array substrate includes: a plurality of signal line groups, each of which is a set of a plurality of signal lines; a plurality of photoelectric conversion elements, each of which is connected... |
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US20080291070 |
DIGITAL/ANALOG CONVERTER AND TRANSMITTER
According to an embodiment of the invention, there is provided a digital/analog converter includes: a decoder that converts a (n−1)-phase input digital signal to a n-phase output digital signal;... |
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US20100164765 |
DAC calibration circuits and methods
Provided is a DAC with tuning circuitry in accordance with some embodiments for tuning current sources in the DAC. The DAC may be used for a sigma-delta converter in some embodiments. |
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US20070236377 |
DIGITAL-TO-ANALOG CONVERTER
Embodiments of a digital-to-analog converter are disclosed. |
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US20060125670 |
Current cell and digital-to-analog converter using the same
Provided are a current cell and digital-to-analog converter (DAC) using the same. The current cell includes a current source; a first transistor transmitting a current produced from the current... |
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US20100164933 |
LCD SOURCE DRIVER
An LCD source driver may include a digital-to-analog converter including a sampling capacitor to sample, according to a signal, at least one of a first voltage and a second voltage. The LCD source... |
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US20090068958 |
FILTER FREQUENCY CHARACTERISTIC DETECTION DEVICE AND FILTER FREQUENCY CHARACTERISTIC TESTING DEVICE
A filter frequency characteristic detection device includes a filter which receives a first signal and a second signal, a comparator which compares the first signal and the second signal which... |
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US20060227028 |
Simple digital interface for advance power supply control
A power converter has a digital control that interfaces with an analog driver through a simple and efficient signal connection. A single signal may be used to encode frequency and pulse width... |
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US20050113948 |
Digital-to-analog audio conversion
In the digital-to-analog conversion of an audio signal, a digital audio signal that comprises a plurality of digitally quantized samples of an audio stream is received. The digital audio signal is... |
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US20160204790 |
DIGITAL-TO-ANALOG CONVERTER, AND MOTOR DRIVING CONTROL APPARATUS AND METHOD USING THE SAME
A digital-to-analog converter may include: a signal modulator configured to receive a signal having a first digital value, and modulate the signal having the first digital value to a signal having... |
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US20080316077 |
D/A CONVERTER
An output from a resister string is selected with a signal of m upper bits of an input digital signal and converted to a pair of analog signals (VH, VL) having a width corresponding to n lower... |
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US20150200681 |
Segmented Digital-To-Analog Converter With Overlapping Segments
In one embodiment, a segmented digital-to-analog converter (DAC) has two configurations (i.e., sub-DACs) with overlapping operating ranges and a data mapper that maps the digital input signal into... |
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US20070268170 |
System and Method for Spur Cancellation
A system for spur cancellation comprises an input, an output, a memory, and a summer. A value corresponding to an energy level of a spur is stored in the memory. The summer is configured to... |
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US20050122243 |
Semiconductor integrated circuit for a radio apparatus and radio communication apparatus
Adjustment data of first and second tracking adjustment circuits 11 and 12 are set in latch circuits 21 and 22. The plurality of pieces of adjustment data latched by the latch circuits 21 and 22... |
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US20100149014 |
SEMICONDUCTOR INTEGRATED CIRCUIT
A semiconductor integrated circuit 10 includes a digital/analog conversion circuit 6. Test signals, which are supplied through signal lines Sig0T through Sig3T, are supplied to the digital/analog... |
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US20090086795 |
METHOD AND SYSTEM FOR A LOW-COMPLEXITY VARIABLE FREQUENCY OSCILLATOR USING DIRECT DIGITAL FREQUENCY SYNTHESIS
Aspects of a method and system for a low-complexity variable frequency oscillator using direct digital frequency synthesis may include generating one or more digital output signals via a Direct... |
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US20080246642 |
Digital-to-analog signal converter, and digital-to-analog signal converting method
A digital-to-analog signal converter includes a digital-to-analog signal converting unit adapted for converting a digital video signal into a pair of analog differential current signals by current... |
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US20060158360 |
Digital to analog converter
A digital to analog converter comprises a plurality of conversion elements as well as a reference conversion element and further comprises mismatch calibration unit for calibrating at least one of... |
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US20060007029 |
D/A conversion apparatus with offset compensation function and offset compensation method for a D/A conversion apparatus
It is an object of the present invention to enable a DC offset of a D/A converter to be removed substantially completely even when a DC offset exists in a comparator. An input switchover switch... |
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US20100103199 |
DRIVING APPARATUS
A driving apparatus used for a display is disclosed. The driving apparatus includes a voltage divider, a first and a second digital to analog converter, and a first voltage amplifier. The voltage... |
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US20100002019 |
DIGITAL TO ANALOG CONVERTER, SOURCE DRIVER AND LIQUID CRYSTAL DISPLAY DEVICE INCLUDING THE SAME
A digital to analog converter includes a first decoder, a gamma reference voltage decoder unit and an active resistor string unit. The first decoder receives 2(N-2) first gamma voltages and... |
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US20070126616 |
Dynamically linearized digital-to-analog converter
Provided is a digital-to-analog converter converting a digital signal into an analog signal. The digital-to-analog converter includes a decoder for selecting a current source from digital inputs,... |
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US20060071836 |
Digital to analog converter
An output voltage proportional to a duty ratio of a PWM signal can be obtained without using a large-scale circuit, even when a high potential (input potential) of an inverter is low. The digital... |
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US20100289683 |
REFERENCE VOLTAGE GENERATION CIRCUIT, A/D CONVERTER AND D/A CONVERTER
A reference voltage generation circuit of the present invention includes: a reference voltage generation part 12 that is connected between a first reference voltage terminal VRT and a second... |