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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7671778 | Digital signal processing scheme for high performance HFC digital return path system with bandwidth conservation In a cable return path system, a method for performing digital companding adds a predetermined offset to the digital value to be companded, and employs a modified μ-law or a-law companding technique to obtain a reduced bit length digital value. One embodiment of th... | 03/02/2010 |
| 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 includes first and second counters. The counter outputs an incremental cod... | 11/03/2009 |
| 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 for converting analog signals into digital signals. The variable quanti... | 06/02/2009 |
| 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 a second order two-dimensional matrix, and wherein the APS array gen... | 05/27/2008 |
| 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 patterns. Modifying loop filter data, such as a loop filter output signal... | 02/05/2008 |
| 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. The latch activates an end signal when the ramp voltage becomes greate... | 12/04/2007 |
| 7295938 | Clock jitter calculation device, clock jitter calculation method, and clock jitter calculation program In a voltage drop analysis step S101, the process calculates a temporal variation of a power source voltage supplied to each cell along a transmission path of a clock signal. In a delay variation rate ratio calculation step S102, the process calculates... | 11/13/2007 |
| 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 source is provided to direct UV light on the symbol. The symbol includes ... | 08/28/2007 |
| 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 array of time-interleaved main signal processors, each main signal proc... | 06/05/2007 |
| 7158067 | Analog to digital converter using sawtooth voltage signals with differential comparator An analog to digital converter includes a resistor-divider network including a plurality of resistors, an arbel channel circuit configured to generate a voltage sawtooth signal as an output, a dc-offset disposed to couple a node of the resistor-divider network and t... | 01/02/2007 |
| 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 2j successive gain values, respectively adjustable by 2j successive values of a first control word of j bits, follow a geometric pro... | 08/29/2006 |
| 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 conversion time as a digital output value of an analog input. The con... | 07/04/2006 |
| 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 reference voltage and a high reference voltage in response to a value in a sh... | 04/26/2005 |
| 6831586 | Comparator circuit and method of operating a comparator circuit A comparator for an analog-to-digital converter comprises an input stage (in+, in−, M1, M2) for receiving an input signal; a bipolar latch stage (Q1, Q2; Q1a-b, Q2a-b) coupled to the inp... | 12/14/2004 |
| 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 partitioned by a series of internal boundaries that are monitonically increas... | 12/14/2004 |
| 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 resolution for pixels providing a low analog voltage level and a ... | 04/08/2003 |
| 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 analog input signal, and a one-bit digital delta-sigma modul... | 12/04/2001 |
| 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 of a pulse generator (5), a bistable element (4), and addit... | 09/04/2001 |
| 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 another neuron yield quantized estimates of analog charge... | 07/17/2001 |
| 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 reference signals are provided in accordance with the principl... | 10/24/2000 |
| 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 signal is converted to a digital signal. The digital signal... | 07/14/1998 |
| 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 transfer function, a second set of memory for storing slope... | 06/28/1994 |
| 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. The transducer is of the inductive type. Two inductance le... | 12/14/1982 |
| 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 signals will cross a boundary and be encoded.... | 04/24/1979 |
| 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 amplitude sample at the coder input. The difference voltag... | 03/06/1979 |
| 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 T1 = pT separated by time intervals T2 = qT in the course of which the integrated value is to be memorized for... | 06/13/1978 |
| 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, a comparator which is supplied at one of it's inputs with... | 05/09/1978 |
| 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 which controls the charging of a timing capacitor from a const... | 02/14/1978 |
| 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 a first DC voltage, a second input terminal for receiving ... | 04/26/1977 |
| 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 signal is greater in a given sense than an analog reference si... | 11/02/1976 |
| 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 piecewise linear comparison signal corresponding to a segment... | 11/02/1976 |
| 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 receives a train of isochronous clock pulses, the reading ... | 03/09/1976 |
