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7639168 Systems and methods for switch resistance control in digital to analog converters (DACs)  
A switch signal generator circuit that may form part of a digital to analog converter is provided. The switch signal generator circuit may include a first switch that controls a high reference gate...
7602322 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 symbol...
7551109 Method, system and apparatus for dual mode operation of a converter  
Methods, systems and apparatuses for operating a converter or other circuits are disclosed. More particularly, in one embodiment a converter or other circuit can be operated in two modes which may...
7511645 Apparatus and method for auto-zeroing a sampled comparator  
A comparator compares an input voltage and a reference voltage and generates an output based on the comparison. The comparator may receive the input voltage in a normal mode of operation. Voltage...
7468686 Systems and methods for providing compact digitally controlled trim of multi-segment circuits  
A trimdac circuit for adjusting the output of a digital-to-analog converter (DAC) is provided. The trimdac may be used to adjust a plurality of resistor segments in the DAC. The trimdac may include...
7460043 Analog-to-digital converter compensation system and method  
An analog-to-digital converter compensation method includes providing at least one analog tone, converting the analog tone into digital signals, and using the digital signals to generate an error...
7460047 Method for VCOM level adjustment with integrated programmable resistive arrays  
A calibrator circuit and method for VCOM voltage adjustment for an LCD includes using integrated programmable resistive arrays. The method uses two DACs and three integrated circuit arrays to...
7414559 Dynamic bias circuit  
A bias circuit includes a digital to analog converter (D 2 A) generating an output representing a voltage level for tuning an analog signal. The D 2 A is coupled to a primary register frame that is...
7382153 On-chip resistor calibration for line termination  
A circuit for calibrating a resistance value on an integrated circuit includes a resistor network, a reference voltage generator, a comparator, a servo loop, and a shift register. The resistor...
7310266 Semiconductor device having memory cells implemented with bipolar-transistor-antifuses operating in a first and second mode  
A DAC having a memory mat including a plurality of first memory cells, and a plurality of output lines connected to the plurality of first memory cells. Each of the plurality of memory cells has a...
7259703 Device for recording laser trim progress and for detecting laser beam misalignment  
The device for detecting and tracking a status of a device under laser trim includes: a series connected string of trim tracking links; and a plurality of detecting devices wherein each detecting...
7215142 Multi-stage inverse toggle  
An inverse toggle circuit includes a pair of input connections for receiving each of four possible input signal combinations in a sequential rotational manner. Each of four data paths are defined...
7209060 Reducing variation in reference voltage when the load varies dynamically  
Providing a substantially constant reference voltage to a component from a reference buffer connected by a path. The load that would be offered to the reference buffer in desired durations is...
7177610 Calibrated low-noise current and voltage references and associated methods  
A low-noise current reference circuitry includes a voltage source, a current source, and a controller. The voltage source generates a reference voltage. The current source provides a low-noise...
7148827 Offset compensating apparatus and method of digital/analog converter  
An offset compensating apparatus and method of a digital/analog converter that are capable of preventing an offset of a driving unit by switching an offset generated from an LCD panel driving unit...
7109901 Use of and gates with a write control circuit for trimming a bleeder resistor  
In a semiconductor integrated circuit, serially inputted trimming data are sequentially written to plural memory cells in accordance with selection signals for trimming a bleeder resistor, making...
7100067 Data transmission error reduction via automatic data sampling timing adjustment  
A data transmission error reduction circuit is formed including a delay circuit, a detection circuit and a control circuit. In one embodiment, the delay circuit includes n delay element and...
7081842 Electronic component value trimming systems  
Described is a system for trimming the value of an electronic component. The system comprises: at least one trimming component, each trimming component having an associated switch for selectively...
7049986 Fuse link trim algorithm for minimum residual  
A parameter of an integrated circuit including a first trim array and a second trim array is trimmed by measuring an initial value of the parameter, determining whether the parameter exceeds a...
7049985 Method and circuit for producing trimmed voltage using D/A converter circuit  
Trimming by disconnecting a fuse connected in parallel to a feedback resistor of an amplifier circuit would cause a variation in voltage value due to a remaining resistance component. A voltage...
7031683 Apparatus and methods for calibrating signal-processing circuitry  
A calibration circuitry includes an adjustable capacitor, a voltage generator, a reference voltage generator, and a controller. The reference voltage generator provides a reference voltage. The...
6882292 Analog to digital converter with bandwidth tuning circuit  
A pipelined analog to digital converter. Each stage in the pipeline has a flash converter and a multiplying digital to analog converter. Each stage provides a digital bits and an analog residue...
6798185 Method and apparatus for testing analog to digital converters  
A method and apparatus for testing ADC circuitry. The method and apparatus detects infrequently occurring errors by providing a series of waveforms to the ADC that have different amplitude,...
6717536 Selective background calibration for A/D converter  
An A/D converter calibration apparatus includes a set of operating condition parameter sensors ( 100 ) for detecting the current operating conditions, which are represented by parameters x 1 , . ....
6664909 Method and apparatus for trimming high-resolution digital-to-analog converter  
A method and apparatus for trimming a high-resolution digital-to-analog converter (DAC) utilizes floating-gate synapse transistors to trim the current sources in the DAC by providing a trimmable...
6509857 Digital-to-analog converting method and digital-to-analog converter  
A digital-to-analog (D/A) converter with a required accuracy can be implemented in a smaller chip area and at a lower cost. The D/A converter comprises a decoder which receives a digital input...
6462684 Advanced self-calibrating, self-repairing data acquisition system  
An improved self-calibrating and self-repairing Data Acquisition System (DAS) for use in inaccessible areas, such as onboard spacecraft, and capable of autonomously performing required system...
6433714 Apparatus and method for precision trimming of a semiconductor device  
The present invention provides methods and apparatus for trimming semiconductor devices and circuits, such as pin electronics circuits used in automated test equipment (ATE) systems and the like,...
6384753 High density analog interface  
An interface module includes a high density analog interface (HAI) for electrical interconnection between a programmable logic controller (PLC) and an analog to digital converter (ADC) or a digital...
6348885 System and method for digitally calibrating an analog-to-digital converter  
A digital calibration system for an analog-to-digital converter system includes a computational system receiving digital bits from an analog-to-digital converter representing selection of elements...
6331830 Self-trimming current source and method for switched current source DAC  
A self-trimming current source for used in a switched current source DAC is made from a fixed current source and a variable current source, which are connected in parallel to provide a total output...
6307490 Digital to analog converter trim apparatus and method  
A digital to analog converter has a decoder configured to select weighted decoding elements in a decoding network. The decoded outputs increase in steps by a mathematical progression as a function...
6307491 Trim systems and methods having temporary and permanent operational modes  
Latch systems and methods are configured to temporarily latch trim signals in experimental combinations of set and reset states and, subsequently, to permanently latch the trim signals in a...
6304201 Precision digital-to-analog converters and methods having programmable trim adjustments  
N-bit precision digital-to-analog converters are provided that facilitate realization of precision linearities (i.e., linearities that substantially exceed N-bit linearity). They include a...
6246353 Integrated-circuit structures and methods for correction of temperature and process-induced parameter errors  
Integrated-circuit structures and methods are provided for generating an error signal that represents temperature and process-induced signal changes in transistor parameters. In particular, a...
6130632 Digitally self-calibrating current-mode D/A converter  
Digital self-calibration of digital-to-digital converters includes an approach to correct for the arbitrary errors in the analog section provided that there are sufficient redundancy in the...
5973631 Test circuit and method of trimming a unary digital-to-analog converter (DAC) in a subranging analog-to-digital converter (ADC)  
In a subranging ADC, the unary DAC is trimmed by walking through its transfer function while toggling an offset cell at the input to the coarse quantizer and a reference cell in the DAC such that...
5959497 Process for controlling the power of the transmission amplifier of radio equipment  
In the method for controlling output of a transmission amplifier of a radio, especially of a mobile telephone, by a digital/analog converter, calibration cycles for the digital/analog converter are...
5905398 Capacitor array having user-adjustable, manufacturer-trimmable capacitance and method  
A programmable integrated circuit capacitor array includes a plurality of binarily weighted capacitors (16) and a plurality of switches (18) selectively coupling the capacitors in parallel between...
5835048 Analog-to-digital converter with improved cell mismatch compensation  
An analog-to-digital converter (ADC) formed on an integrated circuit chip from a plurality of cells includes a differential amplifier having first and second branches. The branches in each cell...
5760720 Digital trimming of on-chip analog components  
A microcontroller for use in battery charging and monitoring applications is disclosed. The microcontroller includes a microprocessor and various front-end analog circuitry such as a slope A/D...
5736951 High speed and high accuracy A/D converter  
An analog-to-digital converter comprises the following elements. A reference voltage generation circuit is provided for dividing a reference voltage into a plurality of divided reference voltages...
5731772 Method and apparatus for compensation for a DC voltage offset of a digital to analog converter  
Disclosed is a method and a device for compensating the DC offset (dU) of a D/A converter (2), particularly in the base frequency modulator of a mobile phone. The method and the device use an error...
5721547 Analog-to-digital converter employing DC offset cancellation after modulation and before digital processing  
An analog-to-digital (A/D) converter is provided for converting an analog signal to a digital signal, wherein the digital signal is corrected such that it does not contain DC offset. The A/D...
5666118 Self calibration segmented digital-to-analog converter  
A method of self calibration for a segmented digital-to-analog converter is provided. The segmented digital-to-analog converter converts a digital input code to an analog output consisting of an...
5642116 Self calibrating segmented digital-to-analog converter  
A method of self calibration for a segmented digital-to-analog converter is provided. The segmented digital-to-analog converter converts a digital input code to an analog output consisting of an...
5525910 Method for trimming wide bandwidth electronic circuits  
An electronic probe circuit having ac and dc amplifiers and an input compensation subcircuit is enclosed within a trim housing that replicates the electrical effect of the probe housing. The...
5396245 Digital to analog converter  
A segmented DAC is described in which the outputs of a pair of subword DAC circuits are summed by modulating the offset voltage of a differential buffer amplifier. Also described are various...
5319370 Analog-to-digital converter with a continuously calibrated voltage reference  
A method and apparatus for calibration of errors in the analog reference voltage input of an analog-to-digital converter. A monolithic reference voltage generator is provided to generate the analog...
5235335 Circuit and method for tuning capacitor arrays  
A capacitor array circuit is disclosed herein. A main capacitor array includes at least a most significant array portion 12 and a least significant array portion 14. A coupling capacitor C C is...
Matches 1 - 50 out of 66 1 2 >