32results about How to "No signal distortion" patented technology

A symmetric optical modulator with low driving voltage, wherein polarization of any one of branched waveguides formed on a substrate is inverted, and the two branched waveguides are simultaneously controlled by a center electrode formed on a top portion thereof, thereby ensuring a low voltage driving and embodying a characteristic of there being no signal distortion due to chirp.

The invention discloses a method for spreading spectrum, comprising the following steps: when a clock signal is detected, acquiring a modulation signal corresponding to the clock signal; and performing spectrum spreading on the clock signal according to the modulation signal, wherein adjacent The modulation signal corresponding to the clock signal is an inverted signal. The invention also discloses a chip, a display panel and a computer-readable storage medium. The present invention controls two independent voltage-controlled oscillators to reversely spread the frequency of two adjacent clock signals by using two modulation signals that are mutually inverse signals, so that the frequency-spreading interval of the clock signal increases and the signal is distorted. The degree of frequency remains unchanged, which solves the technical problem that the spread spectrum effect of the dual clock signal is poor.

The invention discloses a train on-board wireless communication device, and mainly aims to solve the problem that the network signal is poor, the communication quality is low and the Internet speed is low on trains. The train on-board wireless communication device comprises an antenna (1), a combiner module (2), a power divider module (3), an SIM card module (4), a USB module (5), an ATOMD525 core processor module (6), a SATA hard drive module (7), and a network module (8). The combiner module is connected with the antenna module and the power divider module in a two-way mode. The SIM card module is connected with the power divider module and the USB module in a two-way mode. The ATOMD525 core processor module is connected with the USB module, the SATA hard drive module and the network module in a two-way mode. The SIM card module is loaded with nine SIM cards of three major operators in order to increase the bandwidth. The speed of access to the Internet is improved, uninterrupted communication in the moving state of users is ensured, and the demand of train passengers for Internet access can be met.

The invention discloses a method for detecting the thermal stability of polymer-bonded explosive. The method is characterized in that the thermal stability of micro-structures of the polymer-bonded explosive can be detected. The method includes steps of preparing platy PBX (polymer-bonded explosive) samples from the formed PBX; carrying out in-situ variable-temperature neutron or X-photon small-angle scattering experiments in appropriate q ranges to acquire temperature-dependent variation curves of scattered neutron or X-photon counting rates; analyzing temperature-dependent relative and absolute variation of the scattered neutron or X-photon counting rates to judge the thermal stability characteristics of the micro-structures of the PBX. The method has the advantages that the influence offew relative integral micro-structures in the PBX on the thermal stability can be detected by the aid of the method, and the method is an effective method for detecting the thermal stability of micro-structures of complicated multi-component PBX materials; temperature-dependent variation, which is given by the aid of the method, of the scattered neutron or X-photon counting rates is an importantfoundation for intensive research on 'structure-function' relationships between the thermal stability and different types of macroscopic performance of the microscopic structures of the PBX.