| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 81 | 실시간 클록 브라운아웃 검출을 위한 방법 및 장치 | KR1020057024376 | 2004-06-10 | KR1020060028769A | 2006-04-03 | 그로네메이얼,스티븐,에이. |
| A method and apparatus for real time clock brownout detection. A low power real time clock (RTC) operates continuously to keep time in a global positioning system (GPS) receiver while some receiver components are powered down. In various embodiments, a brownout detector circuit detects a loss of RTC clock cycles. If a loss of RTC clock cycles exceeds a predetermined threshold such that the RTC is not reliable for GPS navigation, an RTC status signal so indicates. | ||||||
| 82 | SYSTEMS AND METHODS FOR PROVIDING A CLOCK SIGNAL USING ANALOG RECURSION | EP13834253 | 2013-07-18 | EP2891027A4 | 2016-10-26 | JONES JOHN DAVID |
| 83 | SYSTEMS AND METHODS FOR PROVIDING A CLOCK SIGNAL USING ANALOG RECURSION | EP13834253.0 | 2013-07-18 | EP2891027A1 | 2015-07-08 | JONES, John, David |
| Systems and methods for generating clock signals using analog recursion are provided. In some embodiments, an analog recursion system includes an analog recursion device and one or more recursion loops. The recursion loops interact to form periodic phenomena within the analog recursion device, which may be sampled to generate clock state. By tuning settings of the analog recursion device, the clock state generated by the analog recursion system may be tailored for a variety of purposes. | ||||||
| 84 | CLOCK WITH REGULATED DUTY CYCLE AND FREQUENCY | EP07756118 | 2007-04-26 | EP2021879A4 | 2010-04-28 | DOWLATABADI AHMAD B |
| 85 | CALIBRATED REAL TIME CLOCK FOR ACQUISITION OF GPS SIGNALS DURING LOW POWER OPERATION | EP02776367 | 2002-10-30 | EP1451605A4 | 2007-02-14 | GRONEMEYER STEVEN A |
| Power is conserved in a Global Positioning System (GPS) receiver by shutting down selected components during periods when the GPS receiver is not actively calculating the GPS receiver location. A low power time keeping circuit accurately preserves GPS time when the selected components are deactivated. When the selected components are turned on in response to a wake-up command, time provided from the low power time keeping circuit, corrected for actual operating temperatures, and data from the GPS clock temperature/frequency table, are used to recalibrate time from a GPS oscillator. Positions of the GPS satellites are then estimated such that the real GPS time is quickly determined from the received satellite signals. Once real GPS time is determined from the detected satellite signals, the selected components are deactivated. The process described above is repeated such that accurate GPS time is maintained by the low power time keeping circuit. | ||||||
| 86 | METHOD AND APPARATUS FOR REAL TIME CLOCK (RTC) BROWNOUT DETECTION | EP04776464 | 2004-06-10 | EP1636549A4 | 2006-08-30 | GRONEMEYER STEVEN A |
| A method and apparatus for real time clock brownout detection. A low power real time clock (RTC) operates continuously to keep time in a global positioning system (GPS) receiver while some receiver components are powered down. In various embodiments, a brownout detector circuit detects a loss of RTC clock cycles. If a loss of RTC clock cycles exceeds a predetermined threshold such that the RTC is not reliable for GPS navigation, an RTC status signal so indicates. | ||||||
| 87 | ATOMIC CLOCK BASED ON AN OPTO-ELECTRONIC OSCILLATOR | EP03721605 | 2003-04-09 | EP1493212A4 | 2005-07-13 | MALEKI LUTFOLLAH; YU NAN |
| Opto-electronic oscillators (100) having frequency locking mechanism to stabilize the oscillation frequency of the oscillators to an atomic frequency reference (130). Whispering gallery mode optical resonators may be used in such oscillators to form compact atomic clocks. | ||||||
| 88 | LIGHT CLOCK | EP99967780.0 | 1999-12-30 | EP1147457A1 | 2001-10-24 | Siepman, James Patrick |
| A light clock measures time by having a light pulse source initiating a light pulse which travels a preset distance in an open or closed loop. A counter is increased incrementally upon detection of the light pulse by a light pulse detector. Each increment is a time interval, which is determined by the preset distance divided by the speed of the light pulse. If the loop is an open loop, another light pulse may be initiated upon detection of the previous light pulse. If the loop is a closed loop, no further light pulse initiation beyond the initial light pulse is required, but, when necessary, a light pulse amplifier is used to amplify the light pulse for the next cycle around the closed loop in the light pulse transmission device. | ||||||
| 89 | Continuous time interpolator | EP92307364.7 | 1992-08-12 | EP0529875B1 | 1996-11-27 | Stephenson, Paul |
| 90 | Continuous time interpolator | EP92307364.7 | 1992-08-12 | EP0529875A2 | 1993-03-03 | Stephenson, Paul |
A digital time interpolation system and method for quantizing the time-difference between two digital signals. The present invention measures the time-difference between consecutive zero crossings of a user signal and a reference oscillator (316). The present invention outputs interpolator data, which represents this time-difference in digital form. The present invention includes a quadrature hybrid (305), a synchronizer (304), track-and-holds (T&Hs) (306), analog-to-digital converters (ADC) (308), an encoding circuit (312), and a boundary detector (310). The present invention also includes a system for deskewing the recorded coarse time count and the fine time value. According to the present invention, the reference oscillator (316) is a continuous, two-phase signal having a unique pair of output values at any given instant of its period. By using this reference oscillator (316), the present invention accelerates conversion. The present invention uses a novel boundary detection scheme. By using this boundary detection scheme, the present invention avoids the timing errors which are traditionally introduced by measuring synchronizer outputs directly. |
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| 91 | Equivalent time pseudorandom sampling system | EP86308662.5 | 1986-11-06 | EP0244537A3 | 1990-05-09 | Agoston, Agoston |
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 waveform included within the acquisition windows. The period between successive triggering events is measured and sampling is delayed following an initiating triggering event by delay time adjusted according to the measured period so as to maximize the probability that sampling will occur within an acquisition window. The time difference between samples and subsequent triggering event is measured with high accuracy and resolution utilizing a time interval measurement system based on a dual vernier interpolation. |
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| 92 | Equivalent time pseudorandom sampling system | EP86308662.5 | 1986-11-06 | EP0244537A2 | 1987-11-11 | Agoston, Agoston |
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 waveform included within the acquisition windows. The period between successive triggering events is measured and sampling is delayed following an initiating triggering event by delay time adjusted according to the measured period so as to maximize the probability that sampling will occur within an acquisition window. The time difference between samples and subsequent triggering event is measured with high accuracy and resolution utilizing a time interval measurement system based on a dual vernier interpolation. |
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| 93 | General-purpose flexible timer design | JP2008208586 | 2008-08-13 | JP4683500B2 | 2011-05-18 | エー． フランツァー イーサン; リン ウォン−クオ; ヤン ゲー; チェウ−ユエン ヨン チャールズ |
| 94 | Real-time clock that is calibrated to get the gps signal between the low-power operation | JP2003540680 | 2002-10-30 | JP4191605B2 | 2008-12-03 | エー グロンメイヤー スティーブン |
| Power is conserved in a Global Positioning System (GPS) receiver by shutting down selected components during periods when the GPS receiver is not actively calculating the GPS receiver location. A low power time keeping circuit accurately preserves GPS time when the selected components are deactivated. When the selected components are turned on in response to a wake-up command, time provided from the low power time keeping circuit, corrected for actual operating temperatures, and data from the GPS clock temperature/frequency table, are used to recalibrate time from a GPS oscillator. Positions of the GPS satellites are then estimated such that the real GPS time is quickly determined from the received satellite signals. Once real GPS time is determined from the detected satellite signals, the selected components are deactivated. The process described above is repeated such that accurate GPS time is maintained by the low power time keeping circuit. | ||||||
| 95 | Light - atomic clock based on the electronic oscillator | JP2003585274 | 2003-04-09 | JP4163630B2 | 2008-10-08 | ルトフォラ マレキ; ナン ユー |
| 96 | Light - atomic clock based on the electronic oscillator | JP2003585274 | 2003-04-09 | JP2005522887A | 2005-07-28 | ルトフォラ マレキ; ナン ユー |
| 発振器の発振周波数を原子周波数基準に安定化する周波数同期メカニズムを有する光−電子発振器。 かかる発振器にささやき回廊モードの光共振器を用いて小型の原子時計を形成する。 | ||||||
| 97 | Real-time clock that is calibrated to get the gps signal between the low-power operation | JP2003540680 | 2002-10-30 | JP2005508005A | 2005-03-24 | エー グロンメイヤー スティーブン |
| ＧＰＳ受信機がその位置を積極的に算出しない期間の間選択された構成要素を休止させる事でＧＰＳ受信機の電力が節約される。 選択された構成要素が動作しない間も低電力時刻保持回路がＧＰＳ時刻を正確に保持する。 選択された構成要素が起動コマンドに応じて作動すると実際の動作温度に対し修正された低電力時刻保持回路から供給される時刻とＧＰＳクロック温度／周波数表のデータを用いＧＰＳ発振器時刻が再校正される。 ＧＰＳ衛星位置が推定され受信される衛星信号から真のＧＰＳ時刻が迅速に決定される。 検出された衛星信号から真のＧＰＳ時刻が決定されると選択された構成要素は動作を停止する。 上述の処理が繰り返され正確なＧＰＳ時刻が低電力時刻保持回路によって維持される。
【選択図】図２ |
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| 98 | JPH0463345B2 - | JP10616187 | 1987-04-29 | JPH0463345B2 | 1992-10-09 | AGOSUTON AGOSUTON |
| 99 | Digital time base circuit | JP22417990 | 1990-08-24 | JPH0388424A | 1991-04-12 | UIRIAMU EI TOURENTO |
| PURPOSE: To retard a stimulation pulse in relation to a sample of a time domain reflectmeter system with a small time delay increment by using a difference between periods of two oscillators whose phase is locked. CONSTITUTION: A sample channel 20 is driven by a master oscillator 12 and a pulse channel 30 is driven by a voltage controlled oscillator(VCO) (stimulation oscillator) 14 and the VCO 14 is phase-locked to a master oscillator (reference oscillator) 12. The clock period difference between the period of the VCO 14 and the period of the master oscillator 12, that is, the relative period of the two oscillators 12, 14 is set by a prescribed minimum sample time increment. Thus, the stimulating pulse relating to the sample of the time domain reflectmeter system is retarded with a slight time delay increment. COPYRIGHT: (C)1991,JPO&Japio | ||||||
| 100 | Pseudo-random equivalent time sampling device | JP10616187 | 1987-04-29 | JPS62261963A | 1987-11-14 | AGOSTON AGOSTON |
