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Match Document Document Title
7371005 Automatic circuit and method for temperature compensation of oscillator frequency variation over temperature for a real time clock chip  
An automatic temperature compensated real-time clock (RTC) chip includes a clock portion having a crystal oscillator block including crystal compensation circuitry adapted to be coupled to a...
7284141 Method of and apparatus for measuring jitter and generating an eye diagram of a high speed data signal  
A sampling system is disclosed which measures high speed data signals by performing sampling events at intervals determined by a programmable DDS output frequency and a programmable counter. The...
7246022 Initiation of differential link retraining upon temperature excursion  
A method includes detecting a change in temperature in an integrated circuit that is coupled to a differential communication link, and responding to the detected change in temperature by initiating...
7118269 Method of correcting a real-time clock of an electronic apparatus  
A method of correcting a real-time clock of an electronic apparatus, notably a mobile telephone, in which the real-time clock operates with a first clock generator which generates a real-time clock...
6961287 Time error compensating apparatus and method in a terminal  
A time-error-compensating apparatus and method corrects errors in a real-time clock caused by temperature fluctuations or other external influences. The apparatus includes a frequency counting unit...
6729755 Low power, cost effective, temperature compensated real time clock and method of clocking systems  
A temperature compensated clock and method of clocking systems are provided. The clock preferably has an oscillator for generating an oscillating waveform signal at a preselected frequency and a...
6529447 Compensation of crystal start up for accurate time measurement  
An apparatus comprising a first circuit and a timing circuit. The first circuit may be configured to generate an output clock signal that may compensate for oscillation build-up and stabilization...
6381702 Electronic clock  
A highly accurate electronic timepiece is provided in which the operation of a logical slowdown/speedup circuit for adjusting accuracy is controlled by a CPU. The output of an oscillation circuit...
6312153 Clock or watch having accuracy-improving function  
A register having a predetermined set value is provided in parallel with a counter for counting a basic signal generated from a crystal oscillator. The register and the counter are connected to a...
6217213 Temperature sensing systems and methods  
A temperature-controlled counter/clock arrangement is provided where th rate or frequency of the counting is temperature dependent. This allows for a measuring of thermal accumulation and/or...
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...
6163126 Electronic device  
In an electronic apparatus such as a timing device capable of a quick-moving operation, a detecting coil wound coaxially with a driving coil for driving a rotor is arranged, a feedback-induced...
6146011 Self-correcting watch  
To provide a self-correcting watch wherein a high precision self-correction of the watch circuit can be realized without any troublesome operation, a self-correcting watch of the invention having a...
6019500 Method and apparatus for measuring cumulative time  
An apparatus for measuring cumulative time of operation time of an electrical equipment is comprised of a CPU having a nonvolatile memory and a RAM. This apparatus executes the following steps: (1)...
5903523 Time analyzer having an improved interpolator with temperature compensation  
A time analyzer having an improved interpolator with temperature compensation. The time analyzer of the present invention can be operated in a wide range of temperatures without need of...
5767747 Electronic low power clock circuit and method  
A relatively low frequency oscillator in junction with a much higher frequency oscillator is used to produce a clock that is both accurate and minimizes power consumption. The high frequency...
5748570 Time correction of an electronic clock  
An electronic clock includes a usual oscillator and a more accurate oscillator. The usual oscillator generates a first frequency which causes the electronic clock to operate and the more accurate...
5719827 Highly stable frequency generator  
A highly stable frequency generator (G) comprises an oscillator (10) for generating a first frequency (F1), and further comprises a time base (BT) providing a time stable frequency signal which is...
5717661 Method and apparatus for adjusting the accuracy of electronic timepieces  
A method and apparatus for adjusting the accuracy of an electronic timepiece that includes an oscillator with a 2 n frequency output, means for reducing the oscillator output frequency to a time...
5644271 Temperature compensated clock  
A temperature compensation system includes a first oscillator to generate a number of pulses which vary from a desired frequency as a function of temperature of the first oscillator. The system...
5546363 Clock apparatus for forming time information for use in computer system  
A commercially available clock IC which is easily influenced by a temperature change or the like is used as it is, thereby easily allowing the clock IC to function as a high precision clock IC. A...
5375105 Timekeeping rate regulator for crystal controlled watches and clocks  
An adjustable vibrations counter (20) and an elapsed time counter and switch (18) that select and adjust one second durations, the adjustment depending on whether the timekeeping rate of a watch or...
5274545 Device and method for providing accurate time and/or frequency  
A device and method provide for an accurate output from a unit, such as an oscillator and/or clock providing an output indicative of frequency and/or time. The device includes a processing section...
5245592 Wearing time measuring device for a removable medical apparatus  
A medical apparatus to be worn in the mouth comprises a battery-fed measuring unit (15) including a clock generator (18) and a counter (20) for counting the pulses of the clock generator. Accuracy...
5168478 Time standard assembly with upset protection and recovery means  
A time standard assembly for a global positioning system (GPS), such as for a space vehicle, has a natural-frequency atomic frequency standard (NAFS) which is operated at its natural resonant...
5138707 Method of operating a timer in a digital data processing system  
A method of operating a timer mechanism in a digital data processing system is described in which the contents of at least one timer register is updated by a predetermined time increment during...
5128909 Advanced clock measurement system  
A system to measure time based on the output of a plurality of clocks employs a common oscillator, rather than a frequency synthesizer. Phase differences between a plurality of clocks are measured...
4953148 Elimination of magnetic influence on atomic clocks  
Improved atomic clocks and frequency standards of the type where the frequency of an oscillator is stabilized by locking via a phase lock loop to an atomic resonator and where the output of the...
4899117 High accuracy frequency standard and clock system  
A high accuracy atomic frequency standard and clock which utilizes a micrmputer. The microcomputer compensates for aging and temperature variations in the atomic standard and its slave crystal...
4879669 Sensor signal processor  
A sensor signal processing apparatus for measuring a physical quantity through the use of a sensor. A data processor automatically provides an operation equation by applying two known physical...
4779248 Electronic timepiece  
A rate displaying oscillator circuit for converting and displaying a rate is provided separately from an oscillator which generates a reference signal so that, even when the period of a logical...
4761771 Electronic timekeeping apparatus with temperature compensation and method for compensating same  
An electronic timekeeping apparatus includes a temperature value generating circuit for generating a temperature value, a temperature value converting circuit including a slope adjusting circuit...
4730286 Circuit and method for correcting the rate of an electronic timepiece  
Rate change in a quartz crystal timepiece due, for example, to aging of a capacitance used for correcting the frequency-temperature characteristic of the crystal oscillator of the timepiece, is...
4650344 Radio controlled timepiece  
A radio controlled timepiece includes a radio receiver for demodulating a transmitted signal on which time and date information has been encoded. A pulse sequence is derived from the transmitted...
4537515 Resonator temperature compensated time base and watch using said time base  
To compensate for frequency variation in the quartz oscillator 4, 6 due to temperature variation, a second quartz oscillator 12, 14 forming a thermal sensor is employed. The beat frequency fB...
4533257 Analog electric timepiece  
Circuits are provided for avoiding misdetection of a non-rotated condition after driving the timepiece stepping motor. Voltages induced in the rotor coil by external high frequency magnetic fields,...
4513259 Closed loop temperature compensated frequency reference  
A closed loop frequency source includes a controllable oscillator that provides a first frequency source, a reference oscillator that provides a second signal, and a comparator that compares the...
4502790 Electronic timepiece  
Time sharing of a processor in a timepiece allows for performance without interference of a plurality of functions including timekeeping and supplemental functions. An electronic timepiece includes...
4473303 Electronic timepiece  
An electronic timepiece is provided with a temperature compensation system which combines precise control of the timebase oscillator circuit frequency over a narrow temperature range with control...
4465380 Electronic timepiece  
In an electronic timepiece provided with an electrochromic display device, temperature monitor circuit means are provided for periodically sampling the ambient operating temperature of the...
4465379 Temperature detector circuit for timepiece  
A circuit for compensation of timekeeping inaccuracies induced by ambient temperature variations. A bridge circuit having a temperature sensitive resistive element in one branch and a resistance of...
4464061 Linearizer circuit and an electronic watch incorporating same  
A linearizer circuit comprises a frequency mixer which mixes a first frequency varying in accordance with a change in a parameter and a second frequency from a reference oscillator which has no...
4456386 Timepiece having a divider chain with an adjustable division rate  
The timepiece includes a low frequency oscillator serving as time base and rranged to feed a first chain of frequency dividers having an adjustable division rate in order to display the time and a...
4453834 Electronic timepiece with temperature compensation  
An electronic timepiece having a quartz crystal oscillator circuit as a timebase signal source is provided with a temperature compensation system to compensate timebase signal frequency deviations...
4448543 Time-of-day clock having a temperature compensated low power frequency source  
An electronic time-of-day clock having a low-power time source and compensation circuits selectively operable responsive to pulses output from the low-power time source when system primary power is...
4443116 Electronic timepiece  
An electronic timepiece is provided with a timebase signal source comprising a relatively low frequency quartz crystal oscillator circuit and with means for compensating the timebase signal...
4440501 Method of automatic adjustment of self-contained radio-clock by means of time mark  
A time measuring method is combined with an automatic rate correction process in a digital or quasianalog clock; a clock rate deviation is repeatedly measured, in a predetermined lock-in-range,...
4430009 Arrangement for securing and electrically contacting a battery in a watch  
An electronic watch having an improved arrangement for securing and electrically contacting a battery. The battery is held in the plate of the watch by a clamp bar 10 which is fixed by screws 12a,...
4430008 Quartz oscillation-type electronic timepiece  
A quartz oscillation-type electronic timepiece which consumes less electric power, in which electronic circuits operate on a small constant voltage obtained by a constant-voltage circuit except the...
4430007 Method of reducing the power consumption of the stepping motor of an electronic timepiece and an electronic timepiece employing the method  
The present invention comprises measuring, upon application of a drive pulse to the actuating coil 5 of the stepping motor, the variation in the magnetic induction flux in the stator of the motor,...
Matches 1 - 50 out of 101 1 2 3 >