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7612702 Analog to digital converter having a non-linear ramp voltage  
An analog to digital converter (ADC) includes a digital ramp generator, an analog voltage comparator, a digital to analog converter (DAC) and a data storage device. The digital ramp generator...
7541963 Variable quantization ADC for image sensors  
An A/D converter suitable for use in a system in which the signal power of noise increases with the signal power of the signal, such as an imaging system, utilizes a variable quantization system...
7379011 Lossless nonlinear analog gain controller in image sensor and manufacturing method thereof  
An image sensor comprises an active pixel sensor (APS) array, a first analog-to-digital converter (ADC), and a ramp signal generator. The APS array has includes a plurality of pixels of arranged in...
7327296 Signal processing system with modified delta sigma modulator quantizer output signals to spread harmonic frequencies of pulse width modulator output signals  
The signal processing system includes a pulse width modulator (PWM) that receives input signals from a delta sigma modulator. The PWM generates an output signal having successive frames of PWM...
7304599 Analog-to-digital converter with reduced power consumption in CMOS image sensor  
An analog-to-digital converter includes a comparator, a latch, and a bias control unit. The comparator is turned on by an applied bias voltage for comparing an analog voltage with a ramp voltage....
7261481 UV feature illumination  
In an aspect of the present invention, methods and systems for providing an input device are disclosed. In an aspect of the present invention, the input device includes a symbol and a UV light...
7227479 Digital background calibration for time-interlaced analog-to-digital converters  
The present invention provides for background calibration of a time-interleaved analog-to-digital converter (TIADC). In one embodiment, a background calibrator includes a TIADC having a parallel...
7098838 Amplified analog information reading device with linear DB mode gain control, in particular for an image sensor  
An amplified reading device includes an adjustable gain amplifier AMP receiving analog information and of which 2 j successive gain values, respectively adjustable by 2 j successive values of a...
7071862 Transmission line analog to digital converter  
A transmission line analog-to-digital converter uses an unterminated transmission line driven by a current source to generate a stair-step waveform having equal time step periods for measuring the...
6885331 Ramp generation with capacitors  
A ramp generator includes an array of capacitors having a common top plate that provides a ramp output signal. Each of the capacitors has a bottom plate switched sequentially between a low...
6831588 Range recognizer employing a single range internally partitioned by monotonically increasing boundary values  
A range recognizer applies acquired data to the inputs of a plurality of boundary comparators simultaneously, treating an entire range of values for the data as a single continuum which is...
6831586 Comparator circuit and method of operating a comparator circuit  
A comparator for an analog-to-digital converter comprises an input stage (in + , in − , M 1 , M 2 ) for receiving an input signal; a bipolar latch stage (Q 1 , Q 2 ; Q 1 a-b , Q 2 a-b ) coupled...
6545624 Image sensor with analog-to-digital converter that generates a variable slope ramp signal  
A programmable analog-to-digital converter (ADC) for use in a CMOS imaging system, the CMOS imaging system having an array of pixels, and the ADC configured to provide a enhanced conversion...
6326912 Analog-to-digital conversion using a multi-bit analog delta-sigma modulator combined with a one-bit digital delta-sigma modulator  
An analog-to-digital converter is provided for converting an analog signal to a one-bit digital bit stream. The A/D converter uses a multi-bit analog delta-sigma modulator coupled to receive the...
6285310 Integrating analog/digital converter  
An analog/digital converter including an amplifier (1) wired as an integrator, a comparator (2) electrically downstream from the integrator, a time counter (6) which continually counts the pulses...
6262678 Current-mode spike-based analog-to-digital conversion  
A/D conversion of a current input is performed with integrate-and-fire spiking neurons. Techniques that upcount or downcount the number of spikes fired by one neuron in a time period established by...
6137432 Low-power column parallel ADC in CMOS image sensors  
A low-power column parallel ADC architecture for image sensors that reduces the power consumption by reducing the number of switchings of a comparator to digitize a row of pixel data. Two ramp...
5781142 Method and apparatus for converting an analog measurement signal to a digital signal having reduced conversion error  
In a measurement device, a detector output signal indicative of a condition magnitude, e.g., radiation, pressure, temperature, etc, and a ramp signal are added, and the resulting analog summation...
5325314 Electronic gauge transform  
An apparatus for applying a curve transfer function to an input signal comprises a first set of memory for storing values representing boundary points or distance differences along a curve of the...
4364045 Digitized displacement transducer  
A displacement measuring transducer performs a direct conversion of changes in physical position, particularly angular position, into a digital form suitable for input to a digital microprocessor....
4151516 PCM coder with shifting idle channel noise level  
Circuitry useful in PCM coders for effectively shifting the idle channel noise signal to a level midway between the code state boundaries thereby significantly reducing the likelihood that noise...
4143363 Nonuniform translation between analog and digital signals by a piece-wise linear process  
A weighted resistance network under control of combinational and sequential logic circuits provides a separate reference voltage at each of the digit times of the pulse code for comparison with an...
4095219 Arrangement for coding with compression the absolute value of an analog signal  
The holding integrator of the arrangement, which integrator is to integrate the signal to be encoded during time intervals T 1 = pT separated by time intervals T 2 = qT in the course of which the...
4088993 Device for encoding a plurality of analogical signals  
A device intended for the encoding of PCM telephone signals, the system comprising in particular a reference voltage generator reproducing the 8 linear segments of the standardized compression law,...
4074259 Process for analog/digital conversion  
A programmable analog-to-digital conversion system having a response characteristic which may be shaped as desired by selectively supplying digital control signals to a field effect transistor...
4020487 Analog-to-digital converter employing common mode rejection circuit  
An analog-to-digital converter of the single slope detection type comprising a first input terminal for receiving a first input signal formed by the superposition of a common mode noise voltage on...
3990073 Digital signal processing arrangement using a cascaded integrator function generator  
An analog-to-digital counting encoder or a digital-to-analog counting decoder for a pulse code modulation signal typically requires a function generator using precision components to generate a...
3990000 Alternating current control system  
An alternating current signal is applied across a series connected switch and load and also to a synchronous ramp generator. The switch is closed by a comparator when the ramp generator output...
3943466 Compander for TDM telecommunication system  
Amplitude samples of voice signals to be transmitted by pulse-code modulation are compared with a quasi-exponential reference voltage generated during each sampling interval while a binary counter...
3886541 Exponential ramp A/D converter  
An analog to digital converter which converts an analog signal to a digital signal. The analog signal is representative of a particular analog function or phenomenon and is digitized for use in a...
3877028 PCM encoder-decoder apparatus  
PCM encoder-decoder having a digital code generator which counts through a digital count during a comparison period. An analog voltage waveform generator sweeps in a non-linear manner from a...
3838413 CIRCUIT ARRANGEMENT FOR ANALOG-TO-DIGITAL CONVERSION OF MAGNITUDES OR SIGNALS IN ELECTRICAL FORM  
Apparatus for converting analog electrical signals to a digital electrical signal wherein the statistical probability of a predetermined state for the digital output signal is a predetermined...
3781872 ANALOG-TO-DIGITAL CONVERSION FOR PROCESSING WIDE-RANGE AND NON-LINEAR INPUT SIGNALS  
An analog-to-digital converter for processing non-linear input signals which may vary over several orders of magnitude. In order to speed up signal processing time, the digital output signals of...
3781867 DIGITAL CONTROL APPARATUS  
Digital display apparatus having a source of electric pulses feeding a counter has an extra binary counting stage interposed between the source and the counter. The setting of the extra stage at...
3760407 P.C.M. CODERS  
To achieve a segmented-law analogue to digital signal conversion, a capacitor is charged by a constant current which changes as the states of the three most significant digits of a binary counter,...
3678505 SIMULTANEOUS LOGARITHMIC CONVERSION AND DIGITAL DISPLAY APPARATUS  
A simultaneous positive or negative logarithm conversion and digital display apparatus utilizing two comparators, one actuated when the exponentially decaying voltage on a capacitor discharging...
3611351 ELECTRONIC APPARATUS  
An electronic apparatus, in particular an analog/digital converter having a generator which supplies an output voltage U(n) in dependence on the number n of applied control impulses and which...
3603969 ELECTRONIC DIGITAL CONVERTER  
A digitizer system and apparatus is provided for use, for example, in conjunction with a spectrophotometer for providing optical transmission readings of a test sample, or for converting optical...
3597760 DIFFERENTIAL DIGITAL CONVERTER  
An electronic apparatus and system is described for use in conjunction with a spectrophotometer, and the like, and which is capable, for example, of directly reading the difference between two...
3593007 ELECTRONIC DIGITAL CONVERTER AND READOUT UNIT  
An electronic instrument is described herein for use in conjunction with a spectrophotometer, and the like, and which is capable, for example, of converting optical transmission readings of a...
3579105 DIGITAL READOUT SYSTEM HAVING AN AUTOMATIC ZERO-SETTING CIRCUIT  
A digital measuring circuit for determining a desired mathematical relationship between a first variable input signal and a second relatively constant "reference" signal includes in addition to the...
3569953 WIDE RANGE ANALOGUE TO DIGITAL CONVERTER  
An analogue to digital converter for logarithmically quantizing an analogue input voltage, which may vary over a wide dynamic range, and providing a representative binary-coded decimal readout. The...
3569952 TIME DIVISION MULTIPLEX SYSTEM AND A LOGARITHMIC ENCODER FOR HIGH SPEED MULTIPLEX OPERATION  
A time division multiplex system and a logarithmic encoder for high speed multiplex operation is described. By means of a switching network, the system continuously samples a large number of...
3543152 CIRCUIT ARRANGEMENT FOR THE DIGITAL MEASUREMENT OF ELECTRICAL MAGNITUDES IN A LOGARITHMIC SCALE  
3528749 APPARATUS FOR MEASURING OPTICAL DENSITY  
3513467 FUNCTION GENERATOR CIRCUIT  
3506818 DIGITAL INTEGRATOR WITH AUTOMATIC BASE LINE CORRECTION  
3493963 ANALOG-DIGITAL CONVERTER FOR DIRECT VOLTAGES OR DIRECT CURRENTS WITH LOGARITHMIC VALUATION OF THE INPUT MAGNITUDE  
3414818 COMPANDING PULSE CODE MODULATION SYSTEM  
3349390 Nonlinear analog to digital converter  
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