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| Number | Title | Issue Date |
| 8031093 | 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 form a CMOS switch, thereby reducing the overall transistor count. Th... | 10/04/2011 |
| 7982644 | D/A converter and semiconductor integrated circuit including the same In a current steering D/A converter, a 1LSB current source 1 and a 2LSB current source 2 are binary code current sources for outputting currents with current values weighted by ½, and a 4LSB current source 3 is one of a large number of current ... | 07/19/2011 |
| 7973687 | Differential switch, D/A converter, semiconductor integrated circuit and communication apparatus A differential switch circuit includes a first differential switch basic circuit (1) and a second differential switch basic circuit (2). The first differential switch basic circuit (1) has a first common source node (N1) shared by a plura... | 07/05/2011 |
| 7969338 | Decoding circuit for flat panel display The present invention relates to a decoding circuit for a flat panel display, and more particularly to a decoding circuit for a flat panel display wherein a miniaturization is possible by reducing an area of the circuit. There is provided a decoding circuit comprisi... | 06/28/2011 |
| 7944381 | 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. ... | 05/17/2011 |
| 7907072 | Digital-to-analog converter A DAC unit, connected to a current supply transistor, includes first control transistors connected in parallel to each other, with each being connected in series to the current supply transistor. The first control transistors drive currents at different current valu... | 03/15/2011 |
| 7889106 | Current mirror circuit and digital-to-analog conversion circuit A first switched capacitor circuit is connected to the source of one MOS transistor of a current mirror pair configured by a pair of MOS transistors and a second switched capacitor circuit is connected to the source of the other MOS transistor. Each of the first and... | 02/15/2011 |
| 7830288 | Fast, efficient reference networks for providing low-impedance reference signals to signal processing systems Reference network embodiments are provided for use in pipelined signal converter systems. The network embodiments are fast and power efficient and they generate low-impedance reference signals through the use of at least one output transistor, a diode-coupled transi... | 11/09/2010 |
| 7808410 | Current control circuit Provided is a current control circuit. A current control circuit may include a clock sensing unit configured to generate a control signal according to one or more frequencies based on a plurality of clock signals, and a current scaling unit configured to scale a bia... | 10/05/2010 |
| 7791514 | Digital-to-analog converter having constant current cells producing even constant currents A digital-to-analog converter includes MOS transistors formed in the identical configuration and arranged in a matrix array. Ones of the MOS transistors placed on the inner part of the array serve as constant current cells, while others placed around the inner MOS t... | 09/07/2010 |
| 7782236 | Current cell circuit in digital-analog converter Embodiments relate to a current cell circuit in a digital-analog converter. According to embodiments, a current cell circuit in a digital-analog converter may include a current source connected to a power voltage terminal to generate current having a predetermined m... | 08/24/2010 |
| 7777655 | Wideband switched current source Traditionally, constant current source circuits (and, in particular, constant current source circuits that include cascoded current sources) had numerous drawbacks due to parasitic capacitances, especially at higher switching frequencies. Here, however, a constant c... | 08/17/2010 |
| 7773013 | 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 number of its inputs to form a voltage interpolator. The output of t... | 08/10/2010 |
| 7760117 | Flip-flop and pipelined analog-to-digital converter utilizing the same A flip-flop includes a sense amplifier stage and a latch stage. The sense amplifier includes a first P type transistor and generates a first sensed signal and a second sensed signal in a first node and a second node, respectively. When the first P type transistor is... | 07/20/2010 |
| 7714755 | Dynamic bias control circuit and related apparatus for digital-to-analog converters A dynamic bias control circuit includes a current source, a first switch, a differential amplifier, and a third switch. The current source outputs a first current. The first switch is coupled to an output end of the current source for generating the first current. T... | 05/11/2010 |
| 7714756 | Digital-to-analog converter The present invention discloses a digital-to-analog converter (DAC), including a bias voltage generating unit, a digital-to-analog converting stage, and an operating amplifier. The bias voltage generating unit is utilized for generating a first bias voltage. The dig... | 05/11/2010 |
| 7696911 | Amplifier circuit, digital-to-analog conversion circuit, and display device Disclosed is a digital-to-analog conversion circuit in which first and second serial DACs and an amplifier circuit for driving a data line are provided. In a first data period, the first serial DAC converts a first digital signal received in the first data period to... | 04/13/2010 |
| 7675442 | 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. ... | 03/09/2010 |
| 7652601 | Fast, efficient reference networks for providing low-impedance reference signals to signal processing systems Reference network embodiments are provided for use in pipelined signal converter systems. The network embodiments are fast and power efficient and they generate low-impedance reference signals through the use of a complimentary common-drain output stage, at least on... | 01/26/2010 |
| 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 output and a negative output, wherein the positive output of the first ... | 12/08/2009 |
| 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 be in a first state. A second switch selectively establishes, based o... | 12/08/2009 |
| 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 when the output node is to be in a first state. A second transistor s... | 10/27/2009 |
| 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 output node is to be in a first state based on the control signal. A s... | 09/29/2009 |
| 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 power supply line and controlled by a control signal; and a second core t... | 03/10/2009 |
| 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. ... | 02/10/2009 |
| 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 gate devices will select from a wide variety of analog outputs. Repr... | 01/27/2009 |
| 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 to the drains and the gates of the output transistors respectively. ... | 10/28/2008 |
| 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 includes a plural of current cells and a plural of switch-control-sig... | 10/14/2008 |
| 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 load current for generating, for the digital to analog converter, a co... | 09/16/2008 |
| 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 generated across one resistor of the plurality of resistors, a control ci... | 09/09/2008 |
| 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 preceding the particular current cell in time and logically ORing the ... | 09/09/2008 |
| 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 number of its inputs to form a voltage interpolator. The output of t... | 08/26/2008 |
| 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 higher speed by first applying a first voltage (a voltage close to the tru... | 08/12/2008 |
| 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 |
| 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 amplifier section between the input of the ADC and a comparator section... | 07/15/2008 |
| 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 first electrode and a second electrode. The first electrode and the sec... | 07/01/2008 |
| 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 form a CMOS switch, thereby reducing the overall transistor count. Th... | 06/10/2008 |
| 7379000 | 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 gate devices will select from a wide variety of analog outputs. Repr... | 05/27/2008 |
| 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. The group is decoded to drive a plurality of equivalent most signific... | 05/20/2008 |
| 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 designation register that holds a value sent from an upper-level unit, and an ... | 05/13/2008 |
