8 results about "Clock transition" patented technology

In one embodiment, a peripheral device includes an oscillator, a counter to be driven by the oscillator and provide a peripheral device counter value, and processing circuitry to receive a host device counter value from a host device, read host device clock translation parameters from a host memory of the host device, the host device clock translation parameters providing translation between the host device counter value and a host device clock time, read peripheral device clock translation parameters providing a translation between the peripheral device counter value and a peripheral device clock time, read the peripheral device counter value, compute a clock correction as a function of a difference between the host device clock time and the peripheral clock time, based on the host device and peripheral device counter values and clock translation parameters, and correct the host device or peripheral device clock translation parameters based on the clock correction.

The present invention discloses a highly charged Nickel ion optical clock and its implementation method. It uses Ni12+ ions as the clock's reference system, which provides superior anti-interference capabilities and measurement precision compared to conventional low-charge-state ion optical clocks. The Ni12+ ions possess two transition spectral lines at 498 nm and 511 nm that can serve as clock transitions. Utilizing both 498 nm and 511 nm lasers enables a single ion reference system to output two clock signals, allowing for mutual verification. Frequency calibration using these two laser frequencies facilitates the timely detection of operational issues through abrupt changes in their frequency ratio. This approach avoids the problem inherent in a single optical frequency clock, where losing synchronization with the time reference can result in immediately undetectable, erroneous clock signal outputs, thereby significantly enhancing the overall stability of the optical clock.

A signal encoding and decoding protocol to transmit both clock information and a data payload in a single line is disclosed. Data may be encoded in a unipolar non-return-to-zero line in which an initial pulse width determines a clock frequency, followed by a series of pulses indicating the data payload. Each clock transition following an initial synchronization pulse indicates a data bit in which the value of the bit is determined in relation to the previous bit. Edge information may indicate a change in bit value from the previous bit. If the transmission signal remains at the same level for a subsequent clock period, the bit value remains the same.

The application discloses a kind of based on FPGA's multi-protocol routing cross device and method, belong to communication technical field, the device includes: adaptive input identification locking unit respectively receives the data of different protocol type, data is adapted to frequency by dynamic switching state machine, pass through protocol locking mark identification to identify specific frame and distribute data type code;High-speed clock domain transition unit writes data and data type code in FIFO, when reaching half full, data is read using high-speed clock and adds valid mark;Cross configuration unit according to configuration information, data and valid mark and data type code are crossed;Adaptive output unit carries out output end SERDES frequency configuration, the phase of SERDES output clock is adjusted based on digital phase-locked loop using valid mark and high-speed clock, constructs sending clock, and data is output on sending clock from high-speed clock transition.The application realizes the routing cross function of multi-protocol with less FPGA logic resource and more optimal timing.

This application relates to a clock transmission method, a magnetic resonance imaging system, and an apparatus for a magnetic resonance imaging (MRI) system. The method includes: converting a clock signal through a transmitting circuit to obtain a differential clock; converting the differential clock into an optical signal using the transmitting fiber optic device and transmitting it to a receiving fiber optic device; converting the optical signal into an electrical signal using the receiving fiber optic device and transmitting it to the receiving circuit; and converting the electrical signal into a single-channel clock and filtering it to obtain the clock signal. This application transmits the clock signal via optical fiber, which can achieve clock synchronization between the transmitting and receiving ends of the MRI system, ensuring phase coherence. Furthermore, optical fiber transmission exhibits low signal attenuation and enables long-distance transmission, ultimately effectively improving the stability and quality of the clock signal in the MRI system and contributing to improved imaging quality.

The atomic electronic state separator (1) of the present invention includes: an atomic supply unit (11), an atomic movement path (12), a probe laser source (13), and a magnetic field generating unit (M). The atomic supply unit (11) supplies atoms that move in the atomic movement path (12) at a certain speed. The probe laser source (13) supplies a probe laser that propagates coaxially with the atomic movement path (12) in a direction opposite to or the same as the direction of atomic movement. The magnetic field generating unit (M) generates a magnetic field orthogonal to the atomic movement path (12) in the atomic movement path (12) and mixes it with the wave function of the electronic state that allows electric dipole transitions, thereby enabling pulse excitation of clock transitions based on the same probe laser in time and space. Alternatively, a magnetic shielding member can pulse excite clock transitions by shielding the magnetic field applied in the atomic movement path (12) and spatially changing the Zeeman frequency shift, thereby enabling pulse excitation of clock transitions by the same probe laser in time and space. As a result, it is possible to continuously perform spectral analysis of atomic transitions and frequency control of the detection laser, thereby improving the stability of the atomic clock.

The object of this invention is to realize a new magnetic field correction coil that can also be miniaturized or portable in terms of physical packaging. The 3-axis magnetic field correction coil (96) has a first coil group and a second coil group in the X-axis direction passing through the clock transition space where atoms are arranged. The first coil group is a Helmholtz type coil, which is formed in a point-symmetric shape centered on the clock transition space (52). The second coil group is a non-Helmholtz type coil, which is formed in the X-axis direction in a point-symmetric shape centered on the clock transition space (52), and the coil size, coil shape or inter-coil spacing is different from that of the first coil group.

This invention discloses a cold atom two-photon transition physics device based on diffuse reflection cooling, comprising a glass chamber, a diffuse reflection coating, an optical unit, and a detection unit. The glass chamber is an ultra-high vacuum cavity sealed and connected to an external ultra-high vacuum system and an atomic source. Its outer wall is covered with a diffuse reflection coating, on which are formed apertures for cooling light, re-pumping light, excitation light, and fluorescence output. The optical unit includes cooling light, re-pumping light, and excitation light. The cooling light and re-pumping light form a global diffuse reflection cooling light field through the diffuse reflection coating, preparing three-dimensionally distributed cold atom clusters within the cavity. The excitation light passes through the cavity and is reflected back to form a bidirectional opposing light path, constituting a two-photon transition excitation light field. The detection unit collects, filters, and converges the fluorescence signal before outputting it through a photodetector. This invention features a simple structure, small size, and low power consumption, and can output clock transition spectra with high signal-to-noise ratio and narrow linewidth, providing a novel technical solution for small-scale, high-precision optical frequency standards.