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6323798 Switched capacitor type digital-analog converter which generates an analog driving signal from a digital signal by activation of a capacitor  
A switched capacitor type digital-analog converter is provided with an input capacitor group, a first switch group (3-1 to 3-n) a second switch group, a reference voltage switch (6) , a comparator...
6310569 Skewless differential switching scheme for current-mode digital-to-analog converters  
A skewless differential switching circuit uses skewless switching elements to convert complementary signals with skew into complementary output signals with minimal time skew between the output...
6304205 A/D multi-channel pipeline architecture  
An apparatus and method for A/D conversion is provided. The apparatus provides for multi-path multi-channel (MPMC) pipelined A/D conversion. Unlike prior art designs in which the handling of...
6285250 Signal processing integrated circuit which limits current flow through a path between digital and analog signal processing means on a common substrate  
A signal processing apparatus is formed on a single semiconductor substrate and includes in a mixed relation an analog signal processing section and a digital signal processing section. A plurality...
6271779 Current cell and digital-analog converter  
An output unit includes a constant current source, a switching transistor that dumps the constant current when a first signal is low, and a switching transistor that outputs the constant current...
6246351 LSB interpolation circuit and method for segmented digital-to-analog converter  
A segmented digital-to-analog converter includes a string DAC (210) and an interpolation DAC (211). The string DAC includes 2 M series-connected string resistors (Ri) and 2 M pairs of switches...
6218871 Current-switching method and circuit for digital-to-analog converters  
A current-switching method and circuit is provided for use with digital-to-analog converters (DACs) to provide improved compliance and linearity in the output current characteristic. In the...
6208277 High speed analog to digital conversion circuitry using quantum mechanical tunneling structures  
Analog to digital conversion circuitry (800) is disclosed, comprising multiple quantization circuits (802), having a quantization resistor (814, 816, 818, 820) coupled between inputs of adjacent...
6198421 Neural-flash analog-to-digital converter using weighted current similation  
One embodiment of the present invention provides a flash analog-to-digital converter (ADC) based on a feedforward perceptron. The ADC includes a plurality of N stages to provide N digital signals....
6169503 Programmable arrays for data conversions between analog and digital  
Converters such as digital-to-analog converters (DACs) and analog-to-digital converters (ADCs) use conversion arrays containing non-volatile memory cells to provide references that depend on the...
6166670 Self calibrating current mirror and digital to analog converter  
A self calibrating current mirror circuit has a curent mirror input for receiving an input current, and a current mirror output for providing an output current. The circuit utilizes a comparator, a...
6163283 Thermometer coding circuitry  
Coding circuitry (34), for use for example in selecting cells of a cell array in a digital-to-analog converter, produces first and second sets of thermometer-coded output signals in dependence upon...
6160507 Current bit cell and switched current network formed of such cells  
Current bit cell having a current source (P1), a transistor (P6) for detecting the presence of a digital signal bit (Bit) and a plurality of transistors (P2, P5, P7) for detecting at least one...
6114882 Current comparator and method therefor  
A comparator (20, 30) for comparing first and second current inputs includes a first stage that has a first resistor (43) being coupled to a first input node and operable to produce the a first...
6100830 Differential switching circuitry  
Differential switching circuitry, for use for example in a digital-to-analog converter, includes: a first switch element (S1) connected between a common node (CN) and a first output node (OUT1),...
6037885 Digital/analog converter using a floating gate MOS neuron transistor with capacitive coupling  
A digital/analog converter has a neuron MOS transistor, a maintenance circuit which keeps the drain potential of the neuron MOS transistor constant, and a current source. A linear dynamic range in...
5990816 Digital-to-analog current converter employing floating gate MOS transistors  
The present invention relates to a digital-to-analog converter having a plurality of inputs for digital signals and an output for an analog signal. It comprises a current amplification circuit...
5963158 Current amplifier and current mode analog/digital converter using the same  
In a current amplifier, a current obtained by holding an input current from an input terminal by a first current sample/hold circuit is added through a connection to a current obtained by inverting...
5952946 Digital-to-analog charge converter employing floating gate MOS transisitors  
The present invention relates to a digital-to-analog converter having a plurality of inputs for digital signals, and an output for an analog signal. It also contains a charge integration circuit...
5945851 Current source apparatus with bias switches  
A current source apparatus with bias switches, applied in digital-to-analog converters, is disclosed. The current compliance and settling time performances can be promoted via improving the...
5917360 Differential current-switch circuit, D/A conversion circuit and method of transient response reduction  
When a pair of emitter-coupled transistor switches 22A and 22B are switched over, the D flipflop 26A shifts the base potential of a transistor buffer circuit 24 to reduce a potential fluctuation at...
5909187 Current steering circuit for a digital-to-analog converter  
An improved current steering cell for a DAC which eliminates the need for an inverter reduces the noise at the common mode. The cell includes a first and a second current steering MOS transistor of...
5905452 Current source cell apparatus for digital/analog converter  
An improved current source cell apparatus for a digital/analog converter which is capable of off-setting noises and obtaining a faster current switching by using different type current source cells...
5870045 D/A converter  
The present invention provides a D/A converter which has a small area in the chip, a linear current output and a high-speed operation. Each of resistors R 11 -R n1 in a resistor train 11a is...
5844511 Integrated circuit D/A converter  
A D/A converter implemented by an integrated circuit has a first section for conversion of higher-order N1 bits of an input digital signal to output a first current signal I 1 , a second section...
5835039 Self-biasing, low voltage, multiplying DAC  
A multiplying digital-to-analog converter produces first and second output currents that have a magnitude difference equal to a gain value multiplied by a magnitude difference between first and...
5828330 Analog to digital converter having dynamically controlled non-linear output  
The output of an analog to digital converter is selectively controlled to provide a non-linear response by addition or removal of current from resistors in the ADC reference level resistor ladder...
5815103 Accurate digital-to-analog converter  
A digital-to-analog converter that includes pairs of positive and negative current sources that are connected through switches to two differential output lines. The switches are controlled as a...
5812121 Cascode current units with inverter circuitry control  
An output current unit comprises a cascode circuit having a first transistor connected between a voltage supply line and complementary outputs. Second and third transistors are controlled by...
5801655 Multi-channel D/A converter utilizing a coarse D/A converter and a fine D/A converter  
A digital to analog (D/A) converter which has good monotonicity and is small in scale of circuitry, wherein a coarse D/A converter is separated from the fine D/A converter, and the output from the...
5801653 Current cell of a digital-to-analog converter  
A current cell for converting a digital signal to an analog current signal is disclosed. The current cell includes a first PMOS transistor which receives the digital signal from a pre-stage...
5798723 Accurate and precise current matching for low voltage CMOS digital to analog converters  
An operational amplifier in a bias voltage generator of a MOS current summing digital to analog converter corrects deviations in output current due to variations in drain to source voltages in...
5793231 Current memory cell having bipolar transistor configured as a current source and using field effect transistor (FET) for current trimming  
A current memory cell comprises a first bipolar transistor providing a current source and coupled to the emitters of a second and a third bipolar transistor, the latter forming the storage elements...
5784018 Semiconductor circuit  
The invention provides a semiconductor circuit which can fetch and store analog and multilevel data by using a simple circuit. The invention also provides a multilevel memory which can freely...
5764174 Switch architecture for R/2R digital to analog converters  
A switch architecture for a digital-to-analog converter provides improved linearity. A first switch for one leg of the R/2R resistance ladder includes a unit resistor coupled between the MOSFET...
5748125 Digital delay interpolator circuit  
Disclosed is a delay interpolator (DI) circuit (or mixer) that can be driven by digital signals. This DI circuit may be incorporated in the loop of a delay interpolator voltage controlled...
5748127 Two cascoded transistor chains biasing DAC current cells  
A precise current cell for a digital-to-analog (D/A) convertor circuit is designed to compensate for manufacturing process variations. The cell uses a cascoded transistor chain to control the...
5714949 Priority encoder and variable length encoder using the same  
A priority encoder for encoding input data by scanning the input data in a predetermined direction, includes: a first voltage section for charging a plurality of output lines to a first voltage...
5703582 DAC with feedback control for current source bias during non-display period  
A D/A converter of a current output type desirably compensates for changes in the switching characteristic that arise in each constant current circuit. The D/A converter generates an analog output...
5696512 Digital/analog (D/A) converting device with unit current generating circuit having differential switching and reference voltage generating circuits  
The D/A converting device disclosed includes a decoder, and a plurality of unit current generating circuits each having a differential switching circuit and a reference voltage generating circuit....
5689258 Multiple current digital-analog converter capable of reducing output glitch  
A digital-analog converter has unit current source cells each having a differential switch circuit and a constant current source. The differential switch circuit made of two switches is driven by a...
5684738 Analog semiconductor memory device having multiple-valued comparators and floating-gate transistor  
A semiconductor memory circuit which realizes a source follower having a voltage gain equal to one, a decrease in the time necessary for the source follower to reach its full output voltage....
5684485 Multi-comparison analog-to-digital converters using the interpolation principle  
The disclosure concerns a so-called "auto-zeroing" comparator of two analog input voltages to be compared, and an analog-to-digital converter using a set of auto-zeroing comparators enabling the...
5654710 Dynamic power reduction digital-to-analog converter and method therefor  
The present invention relates to a power reduction digital-to-analog (DA) converter current source cell. The power reduction DA converter current source cell is comprised of a DA current source...
5635935 Power reduction technique for current mode digital-to-analog converters  
A video DAC for driving video displays with reduced power dissipation is presented. This is accomplished using a dual driver circuit connected to a current mirror, the dual driver comprising a...
5635745 Analog multiplexer cell for mixed digital and analog signal inputs  
An input cell circuit for an integrated circuit for use in a mixed signal mode where an input pin may receive either digital or analog signals. The circuit solves the problem where several such...
5631647 Analog multiplying type of digital/analog converter circuit  
An improved digital/analog converter circuit of the analog multiplying type for providing an adjustment for a DC voltage offset. The digital/analog converter circuit generally comprises a code...
5612696 Digital-to-analog converter of current segmentation  
A digital-to-analog (D/A) converter of current segmentation is disclosed. A plurality of current sources are connected in parallel to one another and connected to a load resistance through a...
5612697 D/A converter with differential switching circuit providing symmetrical switching  
A digital-to-analog converter including a plurality of binarily-weighted stages each incorporating a differential switch-pair circuit which includes two matched bipolar switch transistors the bases...
5602551 Analog-to-digital converter with silicon-on-insulator structure  
A converter is provided having a layout which can be easily designed and which requires a small chip area. Four MOS transistors having the same layout are disposed on the same substrate, and a...
Matches 151 - 200 out of 371 < 1 2 3 4 5 6 7 8 >