Class / Patent application number | Description | Number of patent applications / Date published |
341138000 | Nonlinear | 14 |
20080284627 | A/D CONVERTER FOR WIDEBAND DIGITAL COMMUNICATION - Circuitry for providing non-uniform analog-to-digital (“A/D”) signal conversion for wideband signals is provided. The circuitry of the invention is optimized for wideband signals because it does not sacrifice the small-scale resolution of high-probability signal amplitudes while preventing the clipping of low-probability signal amplitudes. The circuitry includes a nonlinear amplifier and an A/D converter that may be uniform or non-uniform. The digital output of the A/D converter may be further processed by circuitry that has an output function that is the inverse of that of the nonlinear amplifier, so as to maintain linear A/D conversion. | 11-20-2008 |
20090267817 | Adjustable Analogue-Digital Converter Arrangement and Method for Analogue-To-Digital Conversion - An adjustable analog-digital converter arrangement comprising: an input adapted for receiving an input signal; an analog-digital converter operating by successive approximation, having a signal input coupled with the input, wherein said converter is adapted for converting an analog signal at the signal input into a digital value; an attenuator with an output, wherein an input of said attenuator is coupled to the signal input and is adapted for an amplitude change of signals applied to its input, wherein the amplitude change is controllable by means of a control input, and wherein the attenuator comprises switchable capacitors and forms a part of a first stage of said analog-digital converter; a control circuit having an output coupled to the control input of the attenuator and adapted to initialize, as a function of a comparison of a signal output by the analog-digital converter with a threshold, an automatic adjustment of the attenuation by generating a control signal, and having an output for the output of the control signal that is coupled to the attenuator. | 10-29-2009 |
20110063153 | DATA READOUT SYSTEM HAVING NON-UNIFORM ADC RESOLUTION AND METHOD THEREOF - A data readout system with non-uniform resolution has a pick up head for reading data stored in an optical disc and generating an analog signal, a reference voltage unit for producing a plurality of reference voltage levels, wherein voltage differences between two adjacent reference voltage levels are not all the same, a plurality of comparators for comparing the reference voltage levels with the analog signal and generating comparison results, and an encoder for encoding the comparison results into a digital signal. | 03-17-2011 |
20120032828 | COARSE DIGITAL-TO-ANALOG CONVERTER ARCHITECTURE FOR VOLTAGE INTERPOLATION DAC - For coarse resistor string DACs, a resistor string is placed in an array of columns and rows, each resistor tap is connected to a switch network, and a decoder is used to select switches to be closed such that sub-DAC voltage comes from the resistor taps connected to the selected switches. The voltages from each row are fed into multiplexers, wherein the multiplexers produce output voltages. DAC circuit designs extend the resolution of the output voltages by feeding them into a voltage interpolation amplifier. A method and apparatus are disclosed for implementing Gray code to design coarse DAC architecture for voltage interpolation such that the number of switches required by the circuit is significantly reduced, thereby decreasing required surface area, and improving glitch performance without increasing design complexity. | 02-09-2012 |
341139000 | Automatic control for increasing converter range (e.g., gain ranging, automatic gain control) | 10 |
20090058701 | Using A Chip as a Simulation Engine - The chip is placed in self simulation mode. When the trace logic does not have any more data to output it changes the state of the advance signal. The clock generator detects this state change and issues one gated clock to the functional logic. This creates a new CPU state and causes the change signal to toggle, and the trace logic notes the state change in the signal. It then exports the internal state presented to it. Once it completes the export, it changes the state of advance and the process begins anew. | 03-05-2009 |
20090140897 | Gain matching method and system for single bit gain ranging analog-to-digital converter - A gain matching method for a single bit gain ranging analog to digital converter including selecting, in response to a gain setting, a number of gain elements to be enabled in a multi-element gain controlled array interconnected between an analog input and an analog to digital converter, and patterning the enablement of the selected number of gain elements among the gain elements for matching the gain of the analog to digital converter for a range of gain settings of the converter to reduce in-band gain error due to gain element mismatch. | 06-04-2009 |
20100045497 | SCHEME FOR NON-LINEARITY CORRECTION OF RESIDUE AMPLIFIERS IN A PIPELINED ANALOG-TO-DIGITAL CONVERTER (ADC) - In a method and apparatus for compensating non-linearity of a gain of a residual amplifier (RA), a pipelined analog-to-digital converter (ADC) converts an analog input to a digital output (DO). The ADC includes a plurality of pipelined stages (PPS). Each stage, which includes an instance of the RA, provides a digital code corresponding to an output of the RA included in a preceding stage. A memory stores a piecewise linear representation for modeling the non-linearity of the gain. A calibrated gain of the RA corresponding to each region of a plurality of linear operating regions of the RA is stored in the memory. A gain adjuster adjusts the digital code for each one of the PPS in accordance with a gain factor derived from the calibrated gain for each one of the PPS. A constructor constructs the DO from the adjusted digital code received from each one of the PPS. | 02-25-2010 |
20100052958 | SAMPLE-DEPENDENT AMPLIFICATION OF MAGNETIC RESONANCE SIGNAL - A digitizer for digitizing a magnetic resonance (MR) signal is hereby disclosed, the digitizer comprising at least two analog amplifiers ( | 03-04-2010 |
20100321219 | GAIN CONTROL METHOD AND ELECTRONIC APPARATUS CAPABLE OF GAIN CONTROL - A gain control method is provided. In one embodiment, an amplifier amplifies a first signal according to a gain to obtain a second signal, and a converter converts the second signal to a digital signal. First, the gain is sequentially set to a plurality of gain values. A plurality of entropy values of the digital signal corresponding to the gain values is then calculated. A picked entropy value of the entropy values is then determined. The gain value corresponding to the picked entropy value is then determined as a picked gain value. Finally, the gain is set to the picked gain value for amplifying the first signal. | 12-23-2010 |
20120013495 | SYSTEM FOR DIGITIZING A PARAMETER HAVING AN UNKNOWN VALUE - A system for digitizing the magnitude of a first parameter, which can be inferred by applying to a second parameter and digitizing the magnitude of a resulting third parameter. The circuit which applies the second parameter has an associated bias point with which the magnitude of the second parameter varies. The value of the first parameter can result in an error in the value of the second parameter which results in an error being incurred when the digitized value of the third magnitude is used to infer a digitized value of the magnitude of the first parameter. This is avoided by adjusting the bias point with each successive trial and employing a sequential-trial ADC which performs sequential comparisons between the third magnitude and respective decision thresholds, such that there is no error in the magnitude of the second parameter when the third magnitude is equal to the decision threshold for a particular trial. | 01-19-2012 |
20120062403 | DATA PROCESSING DEVICE AND DATA PROCESSING SYSTEM - In AD conversion of a voltage, data continuity is ensured between the results of conversion after amplification and of direct conversion without amplification. In AD conversion operation, an analog signal output from a DA converter circuit is directly converted by an AD converter circuit, and the analog signal is converted after amplification with an expected gain of 2 | 03-15-2012 |
20120154190 | SIGNAL PROCESSING DEVICE, MASS SPECTROMETER, AND PHOTOMETER - A signal processing device includes amplifiers that are capable of amplifying detected signals using amplification factors that are different from each other; A/D converters that sample plural signals amplified by the amplifiers using the different amplification factors and output from the amplifiers; calculators that perform, on the basis of the amplification factors of the plural amplifiers, calculation on plural data pieces converted by the A/D converters; and a selector that selects one or more of output data pieces from among plural data pieces output from the calculators. | 06-21-2012 |
20130135130 | METHOD AND SYSTEM FOR AUTO-RANGING ANALOG-TO-DIGITAL CONVERTER FOR CURRENT SENSING - Embodiments of the present disclosure provide a method and system for an auto-ranging analog-to-digital converter (ADC) for dynamically scaling inputs to an ADC. The auto-ranging ADC includes a dynamically configurable transistor arrangement for delivering a load current and a replica device for replicating the load current. A current sense resistor generates a replicated load voltage based on the replicated current. The ADC generates a digital value based on the replicated load voltage. The auto-ranging ADC also includes an auto-ranging controller for dynamically configuring the transistor arrangement based on the digital value to scale the inputs to the ADC. | 05-30-2013 |
20140132433 | ANALOG-TO-DIGITAL CONVERTER ARRANGEMENT - An analog-to-digital converter arrangement may include an analog amplifier with variable gain; an analog-to-digital converter; a digital reconstruction element including elements to reduce an influence of transients during a change of the variable gain of the analog amplifier. | 05-15-2014 |