385 results about "Lock time" patented technology

Techniques to schedule activities. In one method, a request to book an appointment for an activity in a particular schedule is initially received. In response, time slots available in the schedule for booking the activity are determined, and a set (all or a subset) of the time slots is provided as possible appointment choices. The time slots in the set are temporarily locked. A next set of time slots or more time slots may be requested (if the time slots provided are not acceptable or desirable), in which case additional time slots may be provided. Thereafter, a selection for one of the time slots is received. In response, the activity is booked in the selected time slot and previously locked time slots are released. The locked time slots may also be released if no selection is received after a particular amount of time.

A phase locked loop, PLL, is described with multiple parallel charge pumps that are selectively disabled as phase lock is approached. A lock detection circuit is described that enabled reference currents to be fed to the parallel charge pumps. The error signal from a phase detector is arranged as UP and a DOWN signals that are averaged in the lock detector. When the average error is large, all the reference currents feed the charge pumps that provide a high loop gain to reduce the lock time. As the lock becomes closer selective reference currents are disabled to reduce loop gain so that a smooth transition to lock is made. Selectively switching currents into a low pass filter that usually follows a charge pump in a PLL circuit automatically reduces switching noise by the operation of the low pass filter.

The invention discloses a phase-locked loop and an automatic frequency calibration circuit thereof. The phase-locked loop comprises a phase/frequency detector, a charge pump, a filter, a voltage-controlled oscillator (VCO) and a first frequency divider which are connected in sequence, wherein the phase-locked loop further comprises the automatic frequency calibration circuit; the automatic frequency calibration circuit reduces the oscillation frequency CKV of the VCO when the oscillation frequency CKV of the VCO after undergoing frequency division by the first frequency divider is higher than the reference frequency CKR, and increases the oscillation frequency CKV of the VCO when the oscillation frequency CKV of the VCO is lower than the reference frequency CKR; and a precharging circuit A0 is connected at the input end of the filter and carries out precharging when AFC carries out searching. The phase-locked loop has the rapid self-tuning locking function and ensures the VCO to carry out coarse tuning automatically to approach the final tuning coil, thus reducing the locking time of the phase-locked loop.

Administration of locks for critical sections of computer programs in a computer that supports a multiplicity of logical partitions that include determining by a thread executing on a virtual processor executing in a time slice on a physical processor whether an expected lock time for a critical section of the thread exceeds a remaining entitlement of the virtual processor in the time slice and deferring acquisition of a lock if the expected lock time exceeds the remaining entitlement.

Clock data recovery (CDR) circuitry or phase locked loop (PLL) circuitry can be provided with a dynamically adjustable bandwidth. One CDR circuit or PLL circuit can be provided to support multiple systems or protocols, multiple parameter requirements for a given system or protocol, and changes in the input frequency or data rate within a given system or protocol. The parameters can include jitter (e.g., jitter tolerance, jitter transfer, jitter generation), source of dominant noise, and lock time. Control signals can be used to dynamically adjust the bandwidth of the CDR circuitry or PLL circuitry while the circuitry is processing data. The control signals can be set by a PLD, by a processor, by circuitry external to the PLD, or by user input.

A time-based system and method are provided for controlling the management of cache memory. The method accepts a segment of data, and assigns a cache lock-time with a time duration to the segment. If a cache line is available, the segment is stored (in cache). The method protects the segment stored in the cache line from replacement until the expiration of the lock-time. Upon the expiration of the lock-time, the cache line is automatically made available for replacement. An available cache line is located by determining that the cache line is empty, or by determining that the cache line is available for a replacement segment. In one aspect, the cache lock-time is assigned to the segment by accessing a list with a plurality of lock-times having a corresponding plurality of time duration, and selecting from the list. In another aspect, the lock-time durations are configurable by the user.

A PLL circuit for two point modulation includes a first loop filter, a second loop filter, a plurality of switching devices, and a calibration module. The first loop filter filters an output voltage of a charge pump during a gain calibration operation. The second loop filter filters the output voltage of the charge pump during a normal operation. The first loop filter has a bandwidth wider than that of the second loop filter to perform a fast calibration by reducing a lock time. The operation of the first loop filter, the operation of the second loop filter, and the opening of the first loop filter are determined by the switching operations of the switching devices. The calibration module adjusts a gain of analog modulation data based on a frequency error accumulated in the first loop filter after the first loop filter is open during the gain calibration operation.

A fast lock circuit for phase lock loop comprising a frequency detector, a phase frequency detector, a logic unit and a corresponding charge pump for the frequency and the phase frequency detectors. Embodiments of the present invention use the logic unit to relay signals from the phase frequency detector circuit to the charge pump when the PLL is in lock. The logic circuit relay signals from the frequency detector circuit before the PLL is in lock. As a result, a constant current is supplied to a large loop filter capacitor before lock. In one embodiment, additional logic circuit may be used to maximize the output current. Therefore, using the logic circuit to supply constant current charges the large loop filter capacitor continuously and avoids a slow down in charging the large loop filter. Accordingly, current is no longer wasted and the lock time is improved.

A system and method for improving the signal-to-noise ratio of a frequency generator suppresses phase noise and noise generated from mismatches in the internal generator circuits. This is accomplished using a modulation scheme which shifts spurious noise signals outside the loop bandwidth of the generator. When shifted in this manner, the noise signals maybe removed entirely or to any desired degree using, for example, a filter located along the signal path of the generator. In one embodiment, a Sigma-Delta modulator controls the value of a pulse-swallow frequency divider situated along a feedback path of a phase-locked loop to achieve a desired level of noise suppression. In another embodiment, a reference signal input into a phase-locked loop is modulated to effect noise suppression. In another embodiment, the foregoing forms of modulation are combined to accomplish the desired frequency shift. Through these modulation techniques, the signal-to-noise ratio of the frequency generator may be substantially improved while simultaneously achieving faster lock times.

The invention discloses a method and a system for protecting time transfer in synchronization network; a corresponding module is added to the prior art to use time synchronization frequency of the synchronization network as the basis of time synchronization protocol, so the network is ensured to synchronously lock clock signal; a synchronization network clock source which participates in selection is configured, and the clock source selection mode is configured; current clock source is selected according to the selection mode, and the frequency state of the current clock source is synchronously locked; the current clock source state is used as state basis of accurate time protocol port to sequentially lock time of element location nodes in the synchronization network. The corresponding module is added to the prior art to use time synchronization frequency of the synchronization network as the basis of time synchronization protocol, so the time transfer error in element location nodes is greatly reduced, and the time error in large scale networking is reduced, and the stability of synchronization network is improved in the switching process of clock sources.

A system and method are disclosed to generate and terminate clock shift modes during initialization of a synchronous circuit (e.g., a delay-locked loop or DLL). Upon initialization, the DLL is entered into a ForceSL (Force Shift Left) mode and an On1x mode (i.e., left shifting on each clock cycle). The feedback clock that tracks the phase of the reference clock (which, in turn, is derived from the system clock) is initially delayed in a coarse phase detector prior to applying it to the coarse phase detection window. Two delayed versions of the feedback clock are sampled by the reference clock to generate a pair of phase information signals, which are then used to establish an advanced phase equal (APHEQ) signal. The APHEQ signal advances onset of the PHEQ (phase equalization) phase and is used to terminate the ForceSL and On1x modes, thereby preventing wrong ForceSL exit due to clock jitter or feedback path overshooting during On1x exit. The avoidance of wrong ForceSL exit and On1x overshooting problems further results in faster DLL locking time.

The invention discloses a method and a device for adjusting screen locking time as well as an electronic terminal. The method comprises the following steps: obtaining values T1, T2, ..., TN of time intervals between continuous N times of screen locking and screen unlocking; and updating the current screen locking time value to the sum of the current screen locking time value plus a predetermined delay time value when judging that the obtained values T1, T2, ..., TN of time intervals are all within a given threshold value range, i.e., the method and the device can be used for monitoring the use conditions of terminal automatic screen locking and user unlocking in real time, judging whether the current screen locking time is appropriate according to the time intervals between continuous N times of screen locking and screen unlocking under the current use environment and conditions, and if not, automatically updating the current screen locking time value to the sum of the current screen locking time value plus the predetermined delay time value, so that the aim of dynamically adjusting the screen locking time according to the current use environment and conditions is achieved, and therefore the screen unlocking operations and screen locking setting of users are effectively reduced and the satisfaction degree of user experience is improved.

A button control system for medical touch screen and method thereof comprises a central control module, a touch signal input module, a lock time control module, a button lock module, a button unlock module and a cleanse display module, wherein the central control module determines the signal inputted by the touch signal input module, and selects to control the button lock module or the button unlock module thereby locking or unlocking a touch button; furthermore, the lock time control module is configured to set up the lock time for the touch button so as to preset the lock time of the touch button as cleansing the touch screen by the user, and after pressing down the cleanse touch button on the touch screen, it allows to control to lock or unlock other touch buttons and also to effectively prevent the occurrence of the situation where the screen button is erroneously touched as performing the cleanse process.

The embodiment of the invention discloses a system restarting reason detection method, device and terminal equipment. The system restarting reason detection method includes the steps that after an intelligent terminal is restarted, firstly, a system journal file needs to be obtained, then whether the system journal file contains process information for ending a system process compulsively or not is found out, when the process information for ending the system process compulsively is contained, related thread stack data are obtained, and the reason for system deadlock is obtained according to the thread stack data; when the reason for system deadlock is interlocking between threads, the interlocked threads are determined; when the reason for system deadlock is that the lock time of the threads exceeds a preset time, the threads with the lock time exceeding the preset time are determined. Consequently, after the intelligent terminal is restarted, whether restarting is caused by system deadlock or not can be detected rapidly, if restarting is caused by system deadlock, deadlock threads can be determined rapidly, research personnel do not need to analyze system messages one by one, and therefore the speed is high, and the efficiency is high.

The invention discloses a synchronous clock phase-locking method for extracting synchronous clock of global positioning system. The invention is used for capturing test signals from global positioning system module with a output frequency ranging of 500Hz to 1MHz, capturing compared clock signals synchronous with the local clock signals, detecting phase of the test signals and the compared clock signals, and adjusting the frequency of local clock signal according to the phase detection results so that the compared clock signals are synchronous with the test signals. By adopting the method, the clock phase-locking ring disclosed by the invention can quickly lock the synchronous clock of the global positioning system. The invention adopts the high-frequency clock signals as the reference clock, thereby reducing the difficulty in designing the frequency division circuit, shortening the phase-locking time of the clock phase-locking ring and saving a large quantity of hardware resources.

The invention discloses a public bicycle renting method achieved by scanning a two-dimensional code. The method includes the following steps that S20, a mobile client generates the two-dimensional code through user data; S30, a front-end service module recognizes the two-dimensional code and sends a matching request to a background server; S40, the background server responds to the matching request, information legality of the two-dimensional code is judged, and a matching result is returned; S50, the front-end service module provides rentable bicycle options, and a lock is controlled to unlock a specific public bicycle selected by a user to rent; S60, the front-end service module detects a public bicycle vehicle return action to obtain bicycle information, and fee is charged according to locking time and rate. Bicycle renting is achieved by scanning the two-dimensional code through the front-end service module, complexity caused by card application is reduced, and user experience is improved. The defect that IC cards in different cities are not uniform or unified is overcome, the bicycle can be rented by means of the two-dimensional code, and great convenience is brought to foreign visitors.