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7629910 Methods and apparatus to control current steering digital to analog converters  
Methods and apparatus to control current steering digital to analog converters are described herein. In one example, a digital to analog converter includes a first unit cell including a positive...
7629909 Circuit for converting a voltage range of a logic signal  
In a circuit to convert a voltage range of a control signal, a first switch selectively couples, based on the control signal, an output node to a first reference voltage when the output node is to...
7619552 Low distortion current switch  
A system and method is provided for code independent switching in a digital-to-analog converter (DAC). A synchronous digital circuit is triggered by a synchronizing clocking signal and develops a...
7609190 Device and method for testing of digital-to-analog converter  
A current-steering digital-to-analog converter (DAC) is tested using a test component having a relaxation oscillator with an oscillation frequency based on the output current of the DAC. A series...
7609186 Circuit for converting a voltage range of a logic signal  
In a circuit to convert a first logic signal having a first range to a second logic signal having a second range, a first transistor selectively couples an output node to a first reference voltage...
7595745 Circuit for converting a voltage range of a logic signal  
In a circuit to convert a first logic signal having a first range to a second logic signal having a second range, a switch selectively couples an output node to a first reference voltage when the...
7583216 Adjustable DAC and applications thereof  
A digital to analog converter (DAC) includes at least one digital to analog conversion module and a gated termination. The at least one digital to analog conversion module is coupled to convert at...
7573412 Digital-to-analog converter (DAC)  
A digital to analog converter (DAC) is provided. The DAC includes a first loop unit to receive a plurality of sources and comprising a plurality of primary winding of transistors formed at a...
7545295 Self-calibrating digital-to-analog converter and method thereof  
A digital-to-analog converter improves differential non-linearity by performing a calibration of at least one weighted cell in response to a calibration command. The digital-to-analog converter...
7528754 Finite impulse response digital to analog converter  
A noise-shaped direct digital IF to RF DAC (DIF2RF) with embedded up-converter mixer is presented. The digital IF signal is noised shaped by a band-pass ΣΔ modulator with a single bit IF output...
7528759 Pipelined analog-to-digital converter  
One embodiment of the present invention includes a pipelined analog-to-digital converter (ADC) comprising a plurality of pipeline stages. At least one of the plurality of pipeline stages comprises...
7515081 High resolution digital-to-analog converter  
A digital-to-analog converter comprises a current supplier, a current divider dividing current supplied from the current supplier into certain amounts, an inverter outputting inverted signals of...
7511649 Circuit for converting a voltage range of a logic signal  
In a circuit to convert a first logic signal having a first range to a second logic signal having a second range, a first metal oxide semiconductor (MOS) transistor selectively couples an output...
7501966 Digital-to-analog converter cell  
A DAC cell comprising: two or more PMOS core devices coupled in series between a power supply and a steering node; a first core transistor coupled between the steering node and a complementary...
7495594 D/A converter and liquid crystal display device  
A D/A converter with reduced power consumption is offered by reducing an amount of electric charges that is charged and discharged as D/A conversion is performed. A terminal of each of four...
7489261 Compensation of nonlinearity of single ended digital to analog converters  
This disclosure relates to a compensating for nonlinearity resulting from a capacitance feedback in current cells of a single ended digital to analog circuit.
7489310 Supply of a programming current to a pixel  
A data line drive circuit is equipped with a single line driver and a gate voltage generation circuit. The single line driver is constructed such that N groups (where N is an integer 2 or larger)...
7482959 D/A converter and communication apparatus  
A D/A converter includes a plurality of current sources configured to be on or off according to input digital data; a constant voltage source configured to apply a constant voltage to the current...
7482957 Floating gate digital-to-analog converter  
The present invention provides a DAC constructed from a series of floating gate devices which are programmable to a series of predetermined values. Addressing one or more of the programmed floating...
7474243 Semiconductor device including switch that conducts based on latched bit and next bit  
A semiconductor device is disclosed. In one embodiment, the semiconductor device includes a first switch, a second switch, and a third switch. The first switch is configured to latch a bit in a...
7471226 Radio frequency digital-to-analog converter  
A radio frequency digital-to-analog converter with a programmable current output. In exemplary aspects of the invention, improved apparatus and methods for providing (i) current mirror matching,...
7443327 Current-output type digital-to-analog converter  
Source potentials of n output transistors are fixed by common fixed voltage, and sources are connected to a current output terminal. A drain and a gate of an input transistor are commonly connected...
7436340 Timing generating circuit and digital to analog converter using the same  
A current-cell type D/A converter using a timing generating circuit for converting a digital code to the corresponding differential voltage Vout between a first analog voltage and a second voltage...
7425909 Low-noise programmable current source  
A low-noise programmable current source includes an output digital to analog converter for providing an output load current; and a control circuit, responsive to an input defining a predetermined...
7423571 Resistor-string digital/analog converter circuit and semiconductor device including the same circuit  
A resistor-string digital/analog converter circuit includes a plurality of resistors configured to divide a predetermined voltage, a plurality of MOS transistors configured to divide a voltage...
7423569 Method and system for a control scheme on power and common-mode voltage reduction for a transmitter  
Provided is a method and system for controlling current characteristics in a transceiver having a transmitter. The method includes identifying a phase control signal from an adjacent current cell...
7417572 Voltage interpolation in digital-to-analog signal conversion  
A multiple-input follower amplifier is coupled through a configuration of switching devices to an upper reference voltage at a number of its inputs and to a lower reference voltage at the remaining...
7411535 D/A conversion circuit and semiconductor device  
A D/A conversion circuit in accordance with the present invention, which is provided with a switch swD, allows a writing operation of a voltage (a true gradation voltage) to be performed at a...
7400279 Circuits and methods with comparators allowing for offset reduction and decision operations  
Circuits and methods may be improved by using ADCs that compensate for the effect of comparator input offset on comparator decisions. Offset compensation may be implemented in an ADC by using an...
7394416 Analog-digital converter  
An analog-digital converter includes an analog switch on a semiconductor substrate, the analog switch having a P-channel transistor and an N-channel transistor; and a capacitive element having a...
7385545 Reduced component digital to analog decoder and method  
An n bit D/A decoder is formed using P-type and N-type transistor switches, instead of convention CMOS switches. Each P-type and N-type switch may be formed of fewer transistors than those used to...
7375671 Systems and methods for reducing transient errors on digital to analog converters (DACs) deglitcher  
A digital to analog converter that receives a digital signal and that converts the digital signal to an analog input signal is provided. The converter may include a group of most significant bits....
7372388 A/D converter, A/D converter control method, and A/D converter connection method  
The present invention is intended to provide an A/D converter making it possible to reduce the power consumption of an output interface. The A/D converter includes an output current value...
7358885 Mixing DAC architectures for a radio frequency receiver  
A receiver ( 300 ) includes a mixing digital-to-analog converter (DAC) ( 118 A), a direct digital frequency synthesizer (DDFS) ( 132 ) and a dynamic element matching (DEM) circuit ( 304 ). A DAC of...
7345609 Current steering d/a converter with reduced dynamic non-linearities  
A digital to analog converter including a first current source ( 3 ) to which a first digital signal ( 28,31 ) is applied for conversion to an analog signal, wherein the first digital signal has a...
7324034 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...
7321326 Current source cell and D/A converter using the same  
A current source cell of one embodiment according to the present invention comprises: first and second transistors which are complementarily switched by a control signal; a constant current source...
7307567 Digital-analog converter and digital-analog conversion method  
The present invention provides a digital-analog converter having: a DEM logic device ( 10 ) for generating at least two digital output data items ( 13, 14 ) from the digital input data ( 11 ) on...
7292172 Current driven D/A converter and its bias circuit  
A current driven D/A converter sets an OFF control voltage (BIAS 3 ) for turning off NMOS transistors M 12 P, M 12 N, M 22 P, M 22 N, M 32 P and M 32 N at a voltage close to an ON control voltage...
7292167 Apparatus for error compensation of self calibrating current source  
An apparatus for error compensation of a self calibrating current source adapted for compensating errors of at least one self calibrating current source. The compensation apparatus includes an...
7248196 Analog-to-digital converters employing cascaded phase-reversing switches  
2 N −1 four-terminal phase-reversing switches are arranged in one or more columns of cascaded switches, wherein a frequency having a given relative phase φ is applied as an input of the top...
7236115 Distributed current sources for folding ADC amplifier stages  
A circuit for reducing the maximum magnitude of the total current on each of a plurality of buses for an amplifier stage in a folding analog to digital converter. Each amplifier stage bus couples...
7221300 Digital-to-analog converter data rate reduction by interleaving and recombination through mixer switching  
A system and method implement very high data rate baseband DACs suitable for wireless applications related to new standards (e.g. Ultra-Wide Band) using CMOS processes allowing an integrated...
7215268 Signal converters with multiple gate devices  
An analog to digital converter including a plurality of multiple independent gate field effect transistors (MIGFET) that provide a plurality of digital output signals, is provided. Each MIGFET of...
7199742 Digital-to-analog converter and related level shifter thereof  
A digital-to-analog converter has a plurality of current cells. Each of the current cells has a level shifter and a current source. The level shifter connects to a first power terminal and a second...
7199728 Communication system with low power, DC-balanced serial link  
A data communication system comprises a transmission line between first and second integrated circuits. An encoder on the first integrated circuit encodes an input data stream to produce a sequence...
7193554 Quantizer circuit  
According to an aspect of present invention, a quantizer is provided with reduced power consumption and area. Such a feature is attained by providing the input signal and a reference signal on...
7158067 Analog to digital converter using sawtooth voltage signals with differential comparator  
An analog to digital converter includes a resistor-divider network including a plurality of resistors, an arbel channel circuit configured to generate a voltage sawtooth signal as an output, a...
7158062 Clocked DAC current switch  
A switch having a first arrangement for providing a first set of first and second complementary intermediate signals; a second arrangement for providing a second set of third and fourth...
7154423 Successive approximation A/D converter comparing analog input voltage to reference voltages and a comparator for use therein  
A successive approximation type of analog-to-digital converter fabricated in a MOS type semiconductor integrated circuit includes a comparison voltage generator for generating a comparison voltage...
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