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| Number | Title | Issue Date |
| 7414517 | Radio frequency identification transponder A radio frequency identification transponder includes a power supply and a dynamic memory array that stores data. When power from the power supply ceases, the data in the dynamic memory array is validly maintained for a predetermined period of time. The dynamic memo... | 08/19/2008 |
| 7280404 | Nonvolatile semiconductor memory device that erases stored data after a predetermined time period without the use of a timer circuit A nonvolatile semiconductor memory device is characterized by including a memory cell to store data, a first reference cell, a check circuit to check a threshold of the first reference cell, and an erase circuit to erase the data of the memory cell in response to de... | 10/09/2007 |
| 7259654 | Radio frequency identification transponder A radio frequency identification transponder includes a power supply and a dynamic memory array that stores data. When power from the power supply ceases, the data in the dynamic memory array is validly maintained for a predetermined period of time. The dynamic memo... | 08/21/2007 |
| 7248145 | Radio frequency identification transponder A radio frequency identification transponder including a power supply and a dynamic memory array which stores data. When power from the power supply ceases the data in the dynamic memory array is validly maintained for a predetermined period of time. The dynamic mem... | 07/24/2007 |
| 7187398 | Characterization of a scan line produced from a facet of a scanning device A method for refining a length of a scan line, where the scan line is produced from a facet of a scanning device. The method includes the steps of: (a) acquiring a plurality of scan line lengths produced from the facet, (b) determining from the plurality of scan lin... | 03/06/2007 |
| 7173882 | Methods and systems for performing horological functions using time cells A simple electronic horological device, termed a time cell, is presented with associated methods, systems, and computer program products. A time cell has an insulated, charge storage element that receives an electrostatic charge through its insulating medium, i.e. i... | 02/06/2007 |
| 7021068 | Refrigerator having power outage duration feature Methods and apparatus for monitoring power outages in a household appliance such as a refrigerator are disclosed. According to the method, a household appliance determines a prior occurrence of a power outage to the appliance. The household appliance then computes a... | 04/04/2006 |
| 6999382 | Signal splitting system and method for enhanced time measurement device operation A system and corresponding method for measuring relative timing of signal events in at least one measurement signal includes input circuitry for receiving such a measurement signal. The input circuitry may include a comparator configured to convert the measurement i... | 02/14/2006 |
| 6950375 | Multi-phase clock time stamping Multi-phase clock time stamping for improving time stamp resolution is provided. One of many possible embodiments is a method for generating a time stamp having an improved time resolution for an event signal. Briefly described, one such method comprises the steps o... | 09/27/2005 |
| 6931338 | System for providing a calibrated path for multi-signal cables in testing of integrated circuits A system for calibrating cables attached to a time measurement device is disclosed. The system includes a calibration device that generates a plurality of synchronized measurement signals that are communicated to a time measurement device by a set of cables. The cal... | 08/16/2005 |
| 6924887 | Method and apparatus for generating charge from a light pulse A method and apparatus for generating charge from a light pulse. In one example, a light sensor includes an active region for generating an electric charge in response to a light pulse. A drift region is formed within a substrate and receives the electric charge fro... | 08/02/2005 |
| 6909672 | Time-to-voltage converter A time interval to voltage converter with very low nonlinearity for time stamping events. The converter automatically selects one of two clocks related to a reference clock and ensures that the time between an event edge to a clock edge is sufficiently large to prop... | 06/21/2005 |
| 6856581 | Batteryless, oscillatorless, binary time cell usable as an horological device with associated programming methods and devices A simple electronic horological device, termed a time cell, is presented with associated methods, systems, and computer program products. A time cell has an insulated, charge storage element that receives an electrostatic charge through its insulating medium, i.e. i... | 02/15/2005 |
| 6831879 | Batteryless, osciliatorless, analog time cell usable as an horological device with associated programming methods and devices A simple electronic horological device, termed a time cell, is presented with associated methods, systems, and computer program products. A time cell has an insulated, charge storage element that receives an electrostatic charge through its insulating medium, i.e. i... | 12/14/2004 |
| 6829200 | Sensing methods and devices for a batteryless, oscillatorless, binary time cell usable as an horological device A simple electronic horological device, termed a time cell, is presented with associated methods, systems, and computer program products. A time cell has an insulated, charge storage element that receives an electrostatic charge through its insulating medium, i.e. i... | 12/07/2004 |
| 6826128 | Sensing methods and devices for a batteryless, oscillatorless, analog time cell usable as an horological device A simple electronic horological device, termed a time cell, is presented with associated methods, systems, and computer program products. A time cell has an insulated, charge storage element that receives an electrostatic charge through its insulating medium, i.e. i... | 11/30/2004 |
| 6711908 | Refrigerator having power outage duration feature Methods and apparatus for monitoring power outages in a household appliance such as a refrigerator are disclosed. According to the method, a household appliance determines a prior occurrence of a power outage to the appliance. The household appliance then computes a... | 03/30/2004 |
| 6701280 | System and method to provide measurement capabilities for both single-ended and differential signals with software switching Improved input circuitry for use in conjunction with measurement devices is disclosed. The subject input circuitry enables a single measurement device to take measurements on both single-ended and differential signal inputs. Software-implemented control s... | 03/02/2004 |
| 6657706 | Method and apparatus for resolving relative times-of-arrival of light pulses A method and apparatus for resolving relative times-of-arrival of a plurality of light pulses includes a plurality of drift-field detectors. Each drift-field detector includes a light sensor and a semiconductor drift region. Each light sensor generates an... | 12/02/2003 |
| 6621767 | Time interval analyzer having real time counter A time interval analyzer for measuring time intervals between events in an input signal includes a trigger circuit that receives the input signal and that outputs a time trigger signal at a first triggering level upon occurrence of a first input signal ev... | 09/16/2003 |
| 6574168 | Time measuring device and testing apparatus A time measuring device includes: an input signal detecting unit for detecting three or more edges in an input signal and to output three or more detection signals in parallel, the three or more detection signals changing based on the three or more edges,... | 06/03/2003 |
| 6498770 | Timer circuit utilizing thermal effect A timer circuit that utilizes the thermal runaway effect, and includes a switch, a resistor, a transistor and a protective device. The temperature of the transistor rises due to a phenomenon known as the thermal runaway effect, which causes the temperatur... | 12/24/2002 |
| 6364503 | Illuminated memorial assembly A illuminated memorial assembly for providing a substantially continual illumination at a memorial site. The illuminated memorial assembly includes a housing. The housing has a bottom portion and a top portion. A plurality of connecting rods connects the ... | 04/02/2002 |
| 6181649 | Time interval analyzer having current boost A time interval analyzer for measuring time intervals between events in an input signal includes a trigger circuit that receives an input signal and that outputs a trigger signal at a triggering level upon occurrence of a first event and at a non-triggeri... | 01/30/2001 |
| 6091671 | Time interval analyzer having interpolator with constant current capacitor control A time interval analyzer for measuring time intervals between events in an input signal includes a trigger circuit that receives an input signal and that outputs a trigger signal at a triggering level upon occurrence of the event. A first current circuit ... | 07/18/2000 |
| 5901114 | Circuit for measuring the cut-off time of an electronic system A circuit for measuring the duration of a cut-off period in the power supply to an electronic system, for example the control system of a motor vehicle starter, comprises a voltage splitting bridge and a processing unit receiving the output of the splitti... | 05/04/1999 |
| 5870352 | DC monitor for active device speed Methods and circuits to measure the speed of silicon test structures using direct current test equipment. Each test structure comprises an oscillator and a detector. Oscillations started by a direct current input signal are rectified by the detector into ... | 02/09/1999 |
| 5790480 | Delta-T measurement circuit A method and apparatus for measuring very short time periods, or differences between two events, such as the delta-T between a trigger point on a waveform and a sampling clock edge of a digital oscilloscope. The delta-T measurements are made using the tim... | 08/04/1998 |
| 5500834 | Device for measuring time lapse after turn off of power source and method thereof While the electric power source is turned on, capacitor 1 is charged to a voltage EO by a direct current constant voltage supplier through transistor 4. When the electric power is disconnected, transistor 4 is switched off to discharge capacitor 1 through... | 03/19/1996 |
| 5122996 | Real-time, uninterrupted time-interval to voltage converter A method and apparatus performs time-interval to voltage conversion immediately and continuously allowing timing variations to be viewed and correlated with other voltage signals displayed on an oscilloscope. A calibration output assists in calibrating th... | 06/16/1992 |
| 5021895 | Method and magnetic head for recording signals magnetically A method of recording signals on a magnetic medium, in which a first magnetic head (1) blanks a wide track by recording signals at a first azimuth angle and a second magnetic head (2) records a narrower signal track (15) by recording signals at a second, ... | 06/04/1991 |
| 4982350 | System for precise measurement of time intervals An integrated system for precise measurement of time intervals wherein a high resolution and accuracy can be achieved through the implementation of an interpolation function and a self calibration function. The interpolation function scales down a relativ... | 01/01/1991 |
| 4879647 | Watchdog timer circuit suited for use in microcomputer A watchdog timer circuit employed in a microcomputer is disclosed. The watchdog timer circuit detects the occurrence of a program abnormal termination or an infinite loop operation and includes a capacitor, a charging circuit charging the capacitor when a... | 11/07/1989 |
| 4870629 | Method for electronic calibration of a voltage-to-time converter A method of calibration for a voltage to time converter in order to increment delays by a fraction of a clock cycle known as an interpolator period is disclosed. The method of calibration compares differences in measurements of a constant and repetitive i... | 09/26/1989 |
| 4769798 | Successive period-to-voltage converting apparatus An apparatus which successively converts the period defined by successive two pulses of a series of input pulses into a voltage, and in which fractional times between input pulses and clock pulses are converted, by two fractional time-to-voltage converter... | 09/06/1988 |
| 4504155 | Time-to-voltage converter A constant current source is provided to charge a reference capacitor. The current is switched to the capacitor by a first high-speed analog switch when a first event occurs and the current is turned off by a second high-speed analog switch when a second ... | 03/12/1985 |
| 4394090 | Process timing apparatus An indicating electronic timer useful for timing processing events and for controlling a process measures the elapsed time from a moment at which a process variable attains a predetermined value and produces a signal which varies in accordance with the el... | 07/19/1983 |
| 4367957 | Time-lapse indicator or the like A time-lapse indicator in which a receptacle contains a fluid material having numerous discrete particles dispersed in a liquid carrier, and a layer of absorbent material in close proximity to the receptacle, the receptacle and absorbent material being se... | 01/11/1983 |
| 4301360 | Time interval meter A time interval meter for measuring extremely short time intervals includes a timing circuit operable at a fast predetermined rate over the time interval between first and second events, and operable at a slow predetermined rate which is precisely scaled ... | 11/17/1981 |
| 4277745 | Personal electric field exposure monitor A low frequency electric field exposure monitor integrates personal exposure to an electric field into intervals of electric field intensity.... | 07/07/1981 |
