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| Number | Title | Issue Date |
| 7564398 | Method and apparatus for ad conversion, semiconductor device for detecting distribution of physical quantity, and electronic apparatus A column analog-to-digital converter having a voltage comparator and a counter is arranged for each a vertical signal line. The voltage comparator compares a pixel signal inputted via the vertical signal line at each row control signal line with a reference voltage,... | 07/21/2009 |
| 7164378 | Analog-to-digital converter with reduced average input current and reduced average reference current Novel system and methodology for sampling analog input signals to reduce an average common-mode input current caused by unbalanced nodes of an input signal source. An analog-to-digital (A/D) conversion system for converting an analog input signal supplied by a signa... | 01/16/2007 |
| 7148697 | System and method for measuring electrical characteristics of a capacitor Disclosed are a system and method for measuring electrical characteristics of a capacitor. A measurement assembly can include a constant current assembly for selectively charging and discharging the capacitor and a counter incremented during a measurement period of ... | 12/12/2006 |
| 7091896 | Analog signal sampling system and method having reduced average differential input current A novel sampling system having a sampling device responsive to an analog input signal and a reference signal for providing corresponding charges. A switching circuit is provided to supply the input signal and the reference signal to the sampling device. The switchin... | 08/15/2006 |
| 7088280 | Analog signal sampling system and method having reduced average input current A novel sampling system having a sampling device responsive to an analog input signal and a reference signal for providing corresponding charges. A switching circuit is provided to supply the input signal and the reference signal to the sampling device. The switchin... | 08/08/2006 |
| 7061462 | Driving scheme and electronic circuitry for the LCD electrooptical switching element The invention relates to the problem of the driving of the LCD electrooptic-switching element (1) with alternating, square-wave electric signals, the amplitude of witch can vary between different voltage levels in correspondence with the actual functioning st... | 06/13/2006 |
| 7038610 | Integration type A/D converter, and battery charger utilizing such converter An integration type A/D converter has two sets of integration type A/D converter sections which can be periodically switched over at a predetermined period, with one converter section integrating an input signal to give an integral output voltage and another convert... | 05/02/2006 |
| 7005916 | Amplifier circuit, driving circuit of display apparatus, portable telephone and portable electronic apparatus To obtain an amplifier circuit capable of realizing low power consumption and high-precision output. A controlling unit controls each switch of an offset correction circuit to select one capacitor associated with a voltage level of an input signal selected by an inp... | 02/28/2006 |
| 6958613 | Method for calibrating semiconductor devices using a common calibration reference and a calibration circuit Interface parameters for a plurality of semiconductor devices, particularly parameters for output drivers (i.e. on chip driver) and terminations (i.e. on die termination) for double data rate dynamic random access memories, are aligned using a calibration reference ... | 10/25/2005 |
| 6956516 | A/D conversion circuit, temperature-sensor circuit, integrated circuit, and method of adjusting the temperature-sensor circuit An A/D-conversion circuit is provided that includes: a counter, which outputs a count value CT; a voltage generation circuit, which generates a monotonically increasing or monotonically decreasing analog voltage AV1; a comparator, which compares the analog vo... | 10/18/2005 |
| 6949903 | Method and apparatus for digitizing a voltage When digitizing a voltage, a capacitor is charged, through an impedance, to a voltage value (Um) dependent on the voltage to be digitized. The limits of that one of a plurality of voltage ranges in which said voltage value (Um) lies, are ascertained, and the two lim... | 09/27/2005 |
| 6933870 | Method and apparatus for efficient mixed signal processing in a digital amplifier A system and method of creating a highly efficient digital amplifier which can take either analog or digital inputs, and produce a high power accurate representation of the input to drive speakers or other low impedance load is described. The system employs a transi... | 08/23/2005 |
| 6906648 | Circuit and method of multi-channel dual slope ADC with offset cancellation and hysteresis input A multi-channel dual slope analog-digital converter with offset cancellation an hysteresis input is provided in the present invention, wherein a charge reset period and an auto zero period are eliminated, so as to shorten cycle time. An offset cancel capacitor is al... | 06/14/2005 |
| 6717393 | System for difference calculation using a quad slope converter A system for measuring signals in a non-linear network is provided which reduces the reliance on hardware and processing support when correcting for A/D offset by performing a pair of dual slope measurement cycles with an integrating analog to digital converter (ADC... | 04/06/2004 |
| 6646576 | System and method for processing data Methods and systems for processing data are disclosed. An exemplary system for parsing and modifying data stored in an array of storage elements includes a parsing system configured to access the data stored in selected storage elements of the array of st... | 11/11/2003 |
| 6433713 | Calibration of analog-to-digital converters A multislope, continuously integrating analog-to-digital converter can operate in either a conversion mode or a calibration mode. During the calibration mode, a calibration factor is calculated for use during the conversion mode. When applied to the conve... | 08/13/2002 |
| 6384760 | Analog-to-digital converter A multislope, continuously integrating analog-to-digital converter includes a first switch coupled to a first reference voltage, a second switch coupled to a second reference voltage, a third switch coupled to an input voltage, and an integrator operably ... | 05/07/2002 |
| 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 |
| 5870078 | Reduced cost pointing stick circuit A low-cost circuit processes, with high precision, the output signals of a pointing stick used for controlling a cursor on a computer display screen. A two-stage method of high precision moderate range analog-to-digital (A/D) conversion is combined with a... | 02/09/1999 |
| 5614902 | Ratiometric analog to digital converter with automatic offset According to the present invention, standard analog to digital converter circuitry may be utilized to measure an unknown analog value and to produce a digital value after conversion that automatically contains an offset value with respect to a given measu... | 03/25/1997 |
| 5565869 | Multiple slope analog-to-digital converter having increased linearity A multiple slope integrating analog-to-digital converter (ADC) includes an integrator and a comparator in which an input voltage to be measured is applied to a summing node at the input of the integrator during an integrate cycle, while at the same time p... | 10/15/1996 |
| 5327137 | Multiple ramp procedure with higher order noise shaping An analog-to-digital converter operates according to the multiple ramp procedure with continuous integration of the input signal in a charge storage or charge summation circuit, whereby downward integration is performed at periodically recurrent time inte... | 07/05/1994 |
| 5321403 | Multiple slope analog-to-digital converter A multiple slope integrating analog-to-digital converter (ADC) includes many improvements and refinements which eliminate timing and non-linearity errors which accumulate due to a large number of switching operations that occur over an integrate cycle. Th... | 06/14/1994 |
| 5289187 | Method and means for converting an analog signal into a digital signal Method and apparatus for converting an analog input voltage signal (preferably in the form of a low-frequency rectangular voltage) to a digital output signal proportional to the input voltage. The input voltage is integrated to the integrator voltage over... | 02/22/1994 |
| 5216426 | Integrating ADC having memory capacitor connected to integrator output and one comparator input and voltage divider connected to integrator output and the other comparator input An integrating analog-to-digital converter comprising an integrator, a memory capacitor for memorizing the potential of an integrated output from the integrator, a comparator for comparing the potential memorized in the memory capacitor and the potential ... | 06/01/1993 |
| 5200752 | Integrating analog to digital converter run-up method and system A multislope A/D converter is presented which employs a multislope integration technique enabling the use of a single comparator to detect polarity changes in the integrator output voltage. The run-up interval of the integrating A/D converter is controlle... | 04/06/1993 |
| 5148171 | Multislope continuously integrating analog to digital converter A multislope continuously integrating analog-to-digital converter for converting an analog input signal into a digital output signal where the converter employs an integrator for continuously integrating the input signal in relation to a series of referen... | 09/15/1992 |
| 5101206 | Integrating analog to digital converter An integrating analog-to-digital converter (ADC) which calculates the coarse portion of its output by integrating an input analog signal over a predetermined number of time intervals during runup using a known technique to define the analog signal in term... | 03/31/1992 |
| 5066955 | Analog to digital converters with convergence accelerating signals Integrating analog to digital converter operating according to a multiple ramp procedure and having a charge storage or charge summation circuit which continuously up-integrates an input signal and which by means of a following comparator, a logic circuit... | 11/19/1991 |
| 5019817 | Analogue-to-digital converter A multiple ramp analogue-to-digital converter comprises an integrator connected to receive and integrate an analogue input signal to be converted, and an opposing coarse reference signal. Instead of these signals being applied to the integrator sequential... | 05/28/1991 |
| 5012247 | Switched-capacitor analog-to-digital converter with autocalibration The present invention provides a switched capacitor analog-to-digital converter for the sampling of an analog input signal and conversion to an equivalent digital format utilizing a multi-slope conversion technique. The elements comprising the converter a... | 04/30/1991 |
| 4983972 | Video delta modulation encoder In a continuously variable slope delta modulation encoder or decoder, the slope of a reconstructed signal is varied by selecting the charging voltage across an integrating capacitor. For an NTSC video signal, the charging voltage may be selected by a shif... | 01/08/1991 |
| 4942401 | Analog to digital conversion with charge balanced voltage to frequency converter having polarity responsive offset A bipolar analog voltage is converted into a digital signal by sensing the polarity of the voltage and selectively supplying a bias voltage to an analog-to-digital converter, which can preferably be a charge balanced voltage to frequency converter, as a f... | 07/17/1990 |
| 4906996 | Analog-to-digital converter with offset voltage polarity inversion There is provided according to the invention a method and apparatus for eliminating or minimizing the error due to amplifier offset or drift error in an integrating dual slope analog-to-digital converter. The converter is provided with a switching and con... | 03/06/1990 |
| 4857933 | Analogue to digital converter of the multi-slope type An analogue to digital multi-slope converter has an integrator 10 to which an analogue input signal 30 is continuously applied. A reference voltage 36, 37 is superimposed onto the integrator input 30 in pulse form, being switched on and off according to a... | 08/15/1989 |
| 4851843 | Analogue-to-digital conversion apparatus Apparatus including an analogue-to-digital converter 26 having a given number of digits, includes a variable gain amplifier (23) for the input (VA) to the converter (26). If any one instantaneous value (21A) of the input (VA) is less than is necessary to ... | 07/25/1989 |
| 4574271 | Multi-slope analog-to-digital converter A multi-slope analog-to-digital converter avoids the dielectric absorption problem by providing a predetermined number of risings and fallings of the output of an integrator integrating an input analog signal during a first predetermined period of time, e... | 03/04/1986 |
| 4567465 | Method and apparatus for converting analog signal into digital signal An A-D converter includes an integrator, a measured voltage supply circuit, first and second reference input supply circuits, first and second voltage level detecting circuits, a charge transfer circuit, a clock pulse generator, and a counter. The integra... | 01/28/1986 |
| 4559521 | Calibration of a multi-slope A-D converter A method for compensating for errors in reference current ratios in a multi-slope A-D converter allows determining multiplying factors for correcting the measured digital values of input analog signals that are being measured. The multiplying factors are ... | 12/17/1985 |
| 4556867 | Dual rate, integrating, analog-to-digital converter A dual slope analog to digital (A/D) converter starts by auto zeroing and making a number of high speed A/D samples before auto zeroing again. A microprocessor causes output of the high speed samples for a bar graph and applies predetermined correction fa... | 12/03/1985 |
