Class 368/119 - Plural

Subclass of Class 368 - Horology: time measuring systems or devices
Definition: Subject matter having two or more periodic or periodically
No. of patents: 35
Last issue date: 02/12/2008

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Number	Title	Issue Date
7330803	High resolution time interval measurement apparatus and method A time interval measurement apparatus and method counts the total number of full clock time periods between two measurement signals. Clock fractional time periods are generated between each of the two measurement signals and the next leading edge of a full clock tim...	02/12/2008
7315489	Method and apparatus for time measurement A method is provided for accurate time measurement. Time is first measured with a first oscillator. At designated intervals, a second oscillator is activated for a period of time based on the first oscillator. The second oscillator is more accurate than the first os...	01/01/2008
7263036	Time correction system in cluster system Provided is a time correction system which includes a means for performing time correction of time in an operational system device by obtaining standard time information from outside with the operational system device among the devices in the cluster to be a represe...	08/28/2007
7173495	Redundant back-up PLL oscillator phase-locked to primary oscillator with fail-over to back-up oscillator without a third oscillator A redundant-source clock generator has only two oscillators, rather than three oscillators. A secondary oscillator is phase-locked to a primary clock from a primary oscillator using a phase detector, charge pump, and filter that generate a control voltage to the sec...	02/06/2007
7132766	Method and apparatus for providing a switching signal in the presence of noise A technique for controlling a switching circuit, such as a relay, includes one or more sensing circuits that generate signals based upon the presence of an actuating object and upon a randomly applied strobe signal. The generated signals are sampled and are used as ...	11/07/2006
7085198	Method for producing computer-assisted real-time systems A method for producing a computer-assisted real-time system that includes at least one processing unit. Data exchange between the processing unit and the environment or one or more additional processing units is synchronous or asynchronous. At least one real clock i...	08/01/2006
7085668	Time measurement method using quadrature sine waves A time measurement circuit includes N time stamping units that each includes a dual sinusoid interpolator for achieving high timing resolution. The time measurement circuit is capable of time stamping input signals at a high re-trigger rate, and is thus well suited ...	08/01/2006
7017065	System and method for processing information, and recording medium To provide an integrated information processing unit that is capable of producing images and sounds of high quality. It includes a control unit, information processing units, and a merge unit. Each of the information processing units includes a counter for synchroni...	03/21/2006
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
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
6292062	Method and apparatus for implementing a high-precision interval timer utilizing multiple oscillators including a non-optimal oscillator The present invention is a novel method and apparatus for implementing a high-precision timer utilizing a non-optimal oscillator and a high-speed oscillator wherein only one oscillator is enabled at a given moment in time. The high-precision timer method ...	09/18/2001
6176611	System and method for reducing power consumption in waiting mode A timer for measuring a time period including a high frequency generating unit, a low frequency generating unit and a controller connected to the high and low frequency generating units, wherein the controller deactivates the high frequency generating uni...	01/23/2001
5808971	Timer with temperature compensation of time delays A temperature-compensated high-speed timing circuit, which is particularly advantageous in read-interface circuits for disk-drive interface. The voltage on the integrating capacitor is compared against a voltage defined by the drop, on a resistor, induced...	09/15/1998
5717659	Device for measuring the duration of a time slot A device for measuring the duration of a time slot or interval includes a first clock for supplying pulses of period T and a second clock, whose pulses are shifted with respect to the first. A digital circuit counts the number of pulses of the clocks, whi...	02/10/1998
5663933	Meter circuit The present invention relates to an electronic meter circuit for a time comparison measurement between two successive periodic events with which the signal time ratios between two times two successive events can be recognized by a simple method. The elect...	09/02/1997
5570326	Device for measuring the duration of a time interval A device for measuring the duration of a time interval between an interval start signal (D) and an interval end signal (F). The device includes a digital circuit having first and second clocks (C1, C2) for counting the number of clock pulses between the i...	10/29/1996
5566139	Picosecond resolution sampling time interval unit A time interval unit which operates in accordance with electronic sampling techniques and employing a pair of identical sampling interpolators which are respectively triggered at the start and stop of the time interval to be measured. Each time interval u...	10/15/1996
5511047	High resolution timer using low resolution counter Accurate measurement results can be obtained without increasing the number of bits of a timer. A timer 1 performs counting with low-speed clocks immediately after input pulse is inputted. When the value counted by the timer with the low-speed clock coinci...	04/23/1996
5440528	Dual time base zero dead zone time domain reflectometer A dual time base, zero dead zone time domain reflectometer repetitively launches a predetermined number of stimulus pulses into a transmission system in synchronism with clock signals from a first time base, providing a measurement cycle. The duration of ...	08/08/1995
5382910	Dual time base zero dead zone time domain reflectometer A dual time base, zero dead zone time domain reflectometer repetitively launches a predetermined number of stimulus pulses into a transmission system in synchronism with clock signals from a first time base, providing a measurement cycle. The duration of ...	01/17/1995
5357490	Measuring timer system Accurate measurement results can be obtained without increasing the number of bits of a timer. A timer 1 performs counting with low-speed clocks immediately after input pulse is inputted. When the value counted by the timer with the low-speed clock coinci...	10/18/1994
5263012	Sub-nanosecond time difference measurement An analog system (100) of measuring the difference in time of occurrence of events. The method uses two coherent oscillators (110, 116) of the same frequency which start with predetermined phase when each of the events are detected. The phase difference o...	11/16/1993
4908784	Method and apparatus for asynchronous time measurement The present invention relates to time measurement apparatus and method for measuring, with picosecond precision, intervals between single edged events, where each measured interval comprises the summation of a rough clock count and fine or calibrated vern...	03/13/1990
4788670	Clock voltage supply A clock voltage supply for electronic control circuits such as a computer system for generating four clock signals which are synchronous as to frequency and phase. When n=4, the clock signals are generated with the help of four PLL clocks. So that the fou...	11/29/1988
4678345	Equivalent time pseudorandom sampling system An equivalent time pseudorandom sampling system samples a repetitive waveform within each of several narrow acquisition windows bounding repetitive sections of the waveform in order to obtain equivalent time sample data characterizing the shape of the wav...	07/07/1987
4449830	Method and apparatus for measuring elapsed time between an initiating event and a dependent event A timer system (10,110,210) of two or more timers (10,110,210) measures the response time between an initiating event and a dependent event. The initiating and dependent events may be physically separated or electrically isolated. The timer system (10,110...	05/22/1984
4397031	Time delay computer The time of arrival of a constant speed moving object at a given location is calculated from data representing the time of arrival of the object at two preceeding locations and the relative physical distances between the three locations. An up-down counte...	08/02/1983
4392749	Instrument for determining coincidence and elapse time between independent sources of random sequential events An instrument that receives pulses from a primary external source and one or more secondary external sources and determines when there is coincidence between the primary and one of the secondary sources. The instrument generates a finite time window (coin...	07/12/1983
4383166	Automatic echo-chamber for measuring single time intervals by replication and averaging A method is provided for measuring a single-shot time interval using startable oscillators to replicate indefinitely the time interval for averaging. Also provided is a circuit for automatically selecting a proper ratio of division to ensure that the inte...	05/10/1983
4254492	Redundant clock system utilizing nonsynchronous oscillators A clock system is disclosed having two identical clocks not synchronized with each other. Each of the clocks includes a circuit for selecting the output of one of the clocks as the present system output. Further, each clock includes logic for detecting er...	03/03/1981
4230991	Digital frequency process and method using frequency shifting techniques, especially for low frequency measurements A programmable number of pulses N, of one or more auxiliary frequencies fa, is inserted between pulses of the frequency f1 to be processed. The resulting frequency N.f1, where N is a positive number (N can be fractional), is at any m...	10/28/1980
4168467	Measurement of pulse duration A method and apparatus are disclosed for measuring the duration of unknown pulses in which measurement resolution is determined from adjacent first and second clock pulse frequencies provided by continuously running oscillators in which the first clock pu...	09/18/1979
4165459	Time interval measurement The interval between arrival of two time displaced signals is measured with a resolution less than 0.5 nanoseconds by electronic vernier techniques utilizing transferred electron logic device circuits. The first arriving signal triggers a first clock gene...	08/21/1979
4164648	Double vernier time interval measurement using triggered phase-locked oscillators Measurement of a time interval between a start and a stop event is made by activating a start oscillator in response to the start event and activating a stop oscillator in response to the stop event. The number of cycles of each respective oscillator sign...	08/14/1979

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Class 368/119 - Plural