398results about How to "Increase jitter" patented technology

A dual loop voltage regulation circuit of power supply chip is provided, comprising a capacitor for providing a voltage signal, a comparator for comparing a first reference voltage signal and the voltage signal to output forward or backward trigger signal, a first switch triggered by a forward trigger signal, a second switch triggered by a backward trigger signal, a first operational amplifier generating a first drive signal while the first and second switches are on, a first transistor switch triggered to be on by a first drive signal to provide a current source loop, a third switch triggered by a forward trigger signal, a fourth switch triggered by a backward trigger signal, a second operational amplifier generating a second drive signal while the third and fourth switches are on, and a second transistor switch triggered to be on by a second drive signal to provide a current sink loop.

After a playback RF signal 3 detected from an optical disc medium 1 is waveform-shaped, it is converted into a digital RF signal 6 with a sampling clock 8 having a cycle twice as long as a channel clock. Thereafter, a first offset correction circuit 9 corrects an offset fluctuation in a high frequency band, and a digital adaptive equalizer 23 performs adaptive equalization, and then a second offset correction circuit 27 corrects an offset component that remains after the offset correction by the first offset correction circuit 9, thereby demodulating a digital binary signal 37. Therefore, even when high-speed playback is carried out and an asymmetry depending on the recording quality is large, a reduction in power consumption can be realized while maintaining high-performance playback. Consequently, it is possible to provide an optical disc playback apparatus which can realize sufficient playback performance at low power consumption.

An information recording medium for high-density recording and reproduction that is low-cost and that has good rewrite characteristics. The information recording medium, in which recording is performed as an atomic arrangement is changed by optical irradiation, is capable of a number of rewrites. The information recording medium comprises a substrate on which a first protective layer with a thickness in the range from 18 to 65 nm, a recording film, a second protective layer, and a reflective layer are disposed in the mentioned order as seen from a light-incident side. Not less than 97 atomic % of the composition of the recording film is accounted for by Ge, Bi, and Te.

A programmable logic device (PLD) is provided that supports multi-gigabit transceivers (MGTs). The PLD includes one or more pairs of shared clock pads for receiving one or more high-quality differential clock signals. Dedicated clock traces couple each pair of shared clock pads to one or more MGTs on the PLD. Each MGT includes a clock multiplexer circuit, which allows one of the high-quality differential clock signals to be routed as a reference clock signal for the MGT. The clock multiplexer circuits are designed such that no significant jitter is added to the high-quality clock signals. The clock multiplexer circuits can also route general-purpose clock signals received by the PLD as lower quality reference clock signals for the MGTs. The reference clock signal routed by the clock multiplexer circuit can be stepped down to provide a reference clock for a physical coding sublayer of the MGT.

A cascaded phase-locked loop (PLL) clock generation technique reduces frequency drift of a low-jitter clock signal in a holdover mode. An apparatus includes a first PLL circuit configured to generate a control signal based on a first clock signal and a first divider value. The apparatus includes a second PLL circuit configured to generate the first clock signal based on a low-jitter clock signal and a second divider value. The apparatus includes a third PLL circuit configured to generate the second divider value based on the first clock signal, a third divider value, and a second clock signal. The low-jitter clock signal may have a greater temperature dependence than the second clock signal and the second clock signal may have a higher jitter than the low-jitter clock signal.

The invention discloses a self-shaking falling-off cleaning type filtering device for waste gas and dust treatment, and belongs to the technical field of waste gas and dust treatment.The self-shakingfalling-off cleaning type filtering device is provided with a pressed pushing body which moves downwards in a pressed mode along with high air pressure, and when a filtering net reaches certain adsorption saturation, a magnetic shielding body is pulled to move downwards and disengage from a magnetic ball; and the magnetic shielding effect on the magnetic ball is weakened to a certain extent, at the moment, the magnetic shielding body repels a magnetic repulsion body, the magnetic repulsion body and the filter net expand outwards together, filter holes of the filter net are enlarged, a small amount of dust is shaken off in the expanding process, the filter net has the refiltering capacity, and the air pressure in the filter net is gradually reduced. The magnetic shielding body is reset upwards under the stretching action of the elastic stretching rope to magnetically shield the magnetic repulsion body, the filter net is reset inwards under the elastic action of a compression spring, dust is shaken in the reset rebounding process, meanwhile, a piston type water pressing mechanism is extruded to spray water when the filter net moves inwards, and the flocculation and dust falling effects on the dust are achieved. Agglomerated dust falls into a dust receiving barrel to be collected.

The invention discloses a model-free control method for an aerodynamic heat superhelix nonlinear fractional order sliding mode, and the method comprises the steps: building a mathematical model between the input electric energy and the output temperature of an aerodynamic heat ground simulation system of a hypersonic aircraft based on the law of conservation of energy, and converting the mathematical model into a model-free control superlocal model; constructing a nonlinear fractional order sliding mode surface according to the defined output tracking error, the nonlinear function and the fractional order calculus; and in combination with the nonlinear fractional order sliding mode surface, the super-spiral approaching rate, the super-local model and a time delay observer, a model-free controller of the super-spiral nonlinear fractional order sliding mode is built, and buffeting in the control process is suppressed. According to the design of the nonlinear fractional order sliding mode surface, the stability of control is ensured, the convergence speed is high, the steady-state error and the saturation error are reduced, and the shaking problem of the sliding mode surface is improved through the combination of the super-spiral approaching rate.

The invention discloses an easily cleaned outdoor deinsectization lamp which comprises a deinsectization mechanism and a solar panel, wherein the deinsectization mechanism sequentially comprises a hanging part, a swinging part, a phototatic electric shock part and an accommodating part from top to bottom; the phototatic electric shock part comprises a top cover and a phototatic lamp; a circle of vertical high-voltage electric shock net is arranged at the external part of the phototatic lamp and around the periphery of the phototatic lamp; a circle of insulation ring is connected onto the high-voltage electric shock net in a sleeving manner; an extension spring is arranged between the top end of the insulation ring and the top cover; two doctor bars are oppositely arranged on the bottom end face of the insulation ring; an electric net gap is reserved between the two doctor bars. The solar panel is simple in structure and low in cost, can fulfill the purpose that the volume is automatically increased along with increase of injurious insects, realizes an accommodating structure with a variable volume, reduces the replacement times of the accommodating structure, and is rainproof; the swinging part automatically vibrates with wind, is large in vibration amplitude, and can shake off injurious insects adhered to the electric net; the deinsectization efficiency of the easily cleaned outdoor deinsectization lamp is affected if too many injurious insects are adhered to the electric net.

The invention provides a synchronous control method for multiple TDI CMOS imaging systems, relates to an aerospace application-based synchronous control method for multiple TDI CMOS imaging systems, and aims at solving the problem that when existing imaging systems are subjected to imaging control, the sampling metastate exists. According to the method, a single low-frequency crystal oscillator passes through a clock divider, then is fed into external clock frequency multipliers and jitter clearers and finally is fed into various imaging units; and by testing the metastate area of sampling andadjusting the rising edge of a clock frequency divider reset signal, the robustness of control signal sampling is guaranteed; by conducting dejitter and frequency multiplication on low-frequency clock signals near imaging controllers, increase of amplitude attenuation and jitter of high-frequency clocks is avoided, and then stable and reliable receiving of high-speed serial data is guaranteed; and by testing the metastate area of sampling and adjusting the rising edge of the clock frequency divider reset signal, the robustness of control signal sampling is guaranteed, and a detector can always stably work under various temperature conditions.