1482 results about "Multiplexer" patented technology

The invention belongs to the technical field of storage and calculation integration, and particularly relates to a low-bit-width and high-energy-efficiency floating point storage and calculation integrated circuit based on a partial pre-alignment framework. The circuit comprises a memory array, a pre-calculation unit, an adder tree, a configurable arithmetic unit and a normalization unit, and supports mixed precision operation of FP8MACFP4 and FP8MACFP8. The method is characterized in that a partial pre-alignment strategy dominated by an activation value is adopted, the maximum index of the activation value is dynamically counted, the mantissa of the maximum index is aligned, and multiple partial pre-alignment intermediate results are pre-calculated and latched for reuse; in combination with a customized lookup table and a multiplexer, a pre-calculation result is directly selected to replace real-time multiplication and displacement; and through the reconfigurable hardware, the FP8MACFP8 high-precision operation is realized by utilizing the FP8MACFP4 unit combination. According to the method, complete online floating point multiplication and addition operation is realized, and excellent energy efficiency ratio and operation speed are obtained while high precision is kept.

Aspects of this disclosure relate to a bulk acoustic wave resonator and an integrated capacitor. In certain embodiments, the integrated capacitor can be a metal-insulator-metal capacitor in parallel with the bulk acoustic wave resonator. The metal-insulator-metal capacitor can include a portion of a first electrode and a portion of a second electrode of the bulk acoustic wave resonator. At least part of the metal-insulator-metal capacitor is positioned laterally relative to an acoustic reflector of the bulk acoustic wave resonator. Other embodiments of capacitors integrated with a bulk acoustic wave resonator are disclosed. Related filters, multiplexers, radio frequency modules, radio frequency systems, wireless communication devices, and methods are disclosed.

The invention provides a UCIe standard protocol layer data transmission circuit, a related method and a chip, and the circuit comprises a slicing circuit which is configured to segment a data packet from a service port; sending the slice frame and slice description information associated with the slice frame to a framing device; the framing device is configured to fill a flow control unit Flit with the slice frames from the slice devices and slice description information associated with the slice frames, and send the Flit to the deframing device; the frame deframer is configured to determine slice frames belonging to the same service port from the Flit, and send the slice frames and slice description information associated with the slice frames to a packing circuit corresponding to the service port; and the packing circuit is configured to splice the data slices belonging to the same data packet in the slice frame based on the slice description information and output the data packet. The technical problem that extra delay is introduced due to beat insertion due to the fact that large multiplexers need to be introduced in existing protocol layer data transmission of the UCIe standard is solved.

The invention discloses a scanning high-resolution double-optical-comb spectrum system based on Raman gain modulation. The method is suitable for real-time spectrum detection with a wide spectrum range and high spectral resolution. The system comprises a single-frequency laser and driver, an optical coupler, a mode-locked laser, a rare earth doped amplifier, a wavelength division multiplexer, a Raman gain fiber, a sample to be tested, a photoelectric detector, a data processor and a wavemeter. The single-frequency laser couples part of light to the wavemeter, and the remaining light is divided into two paths to be coupled with the two amplified mode-locked lasers to enter the Raman gain optical fiber for Raman gain modulation and is converted into high-mutual-dryness double optical combs. The double combs pass through a to-be-measured sample in a combined manner, and interference signals are measured by the photoelectric detector and received by the data processor. And meanwhile, the processor sends a tuning signal to the single-frequency laser driver, so that the double combs scan in a wide spectrum range to obtain high-resolution spectrum information. Electrical feedback locking is not needed, and high-precision spectrum acquisition with megahertz resolution in a terahertz range can be completed within a few minutes.

The invention relates to the technical field of electronic circuits, in particular to a filter circuit, a voltage filter control circuit, a chip and electronic equipment. The filter circuit comprises a counter, a first data selector, a digital operation circuit and a register, the counter is used for receiving the counting enable signal, outputting a counting mark value to the first data selector, determining a corresponding current logic operation mode according to the current counting mark value, and performing logic operation on the intermediate input parameter according to the current logic operation mode to obtain a first voltage error value after filtering processing; by adopting the filter circuit provided by the invention, required logical operation can be completed by virtue of the first data selector and the digital operation circuit, so that the first voltage error value is output, and the filtered voltage signal is adjusted according to the first voltage error value, so that the set frequency component in the output voltage signal is filtered out; in this way, complex filter coefficients do not need to be configured, a processor with higher computing power does not need to be used, and hardware cost is saved.

An integrated circuit includes a first multiplexer, a second multiplexing-input, a first clocked comparator, and a second clocked comparator. A first input node is connected to a first multiplexing-input of the first multiplexer, a first multiplexing-input of the second multiplexer, a first comparing-input of the first clocked comparator, and a first comparing-input of the second clocked comparator. A second input node is connected to a second multiplexing-input of the first multiplexer and a second multiplexing-input of the second multiplexer. An output of the first multiplexer is connected to second comparing-input of the first clocked comparator, and an output of the second multiplexer is connected to a second comparing-input of the second clocked comparator. The integrated circuit also includes an offset control circuit connected to a comparator-output of the first clocked comparator and a comparator-output of the second clocked comparator.

Wireless circuitry may include a transmission line that carries a signal and a power detector that measures the signal. The detector may include a rectifier coupled to a comparator over a differential path. An offset calibrating digital-to-analog converter (OSDAC), a reference generator, and a multiplexer may be disposed on a negative line of the differential path. The OSDAC may produce an offset-compensated voltage by adding different offset voltages to a voltage on the second line over time. The reference generator may generate a set of threshold voltages by adding different reference voltages to the offset-compensated voltage. A temperature sensor may adjust the reference voltages used to generate the threshold voltages based on a temperature of the power detector. The multiplexer may route different threshold voltages to a negative input of the comparator.

The invention discloses a relay device and method for long-distance few-mode optical fiber communication, and belongs to the field of optical communication. According to the device, firstly, optical signals transmitted in a few-mode optical fiber are separated into a plurality of independent mode channels through a mode decomposition multiplexer; then, an adjustable light delay unit is configured in each channel, and compensation is carried out according to a difference mode group delay difference pre-calculated or actually measured by a few-mode optical fiber parameter; furthermore, a dimmable amplifier is used for amplifying the signal, power monitoring is carried out at the output end of the amplifier through an optical fiber beam splitter and a photoelectric detector, closed-loop feedback control is formed, and gain of each channel is adjusted in a self-adaptive mode to eliminate mode-dependent loss. According to the invention, signal distortion can be effectively suppressed in an optical domain, the complexity of digital signal processing of a receiving end is reduced, and the transmission distance and the transmission capacity of a few-mode optical fiber mode division multiplexing communication system are remarkably improved.

The utility model provides a touch display substrate and a display device, belongs to the technical field of display, and can solve the problem that an existing touch display substrate is large in touch blind area. The touch display substrate is provided with a display area and a peripheral area and comprises a substrate body, a display layer and a touch layer. The touch layer comprises a plurality of touch electrodes and a plurality of touch signal lines connected with the touch electrodes in a one-to-one correspondence mode. The plurality of touch electrodes are located in the display area, and the plurality of touch signal lines extend from the display area to the peripheral area; the multi-path selectors are located in the peripheral area; the plurality of touch electrodes are divided into a plurality of groups arranged side by side in the second direction, the touch electrodes in each group are arranged side by side in the first direction, and the touch electrodes in each group are divided into a plurality of touch units; at least part of the touch units in the same group are connected with the multiplexers which are located on different sides of the display area. The touch display substrate can effectively reduce the proportion of touch blind areas.

The application discloses a kind of EFPI optical fiber sensor multi-sensor multiplexing temperature-pressure demodulation system and method, including ASE broadband laser, optical circulator, EFPI optical fiber sensor, 2-way wavelength division multiplexer, N-way wavelength division multiplexer, N-way wavelength division demultiplexer, photoelectric detector, FBG, 1*2 optical fiber coupler, optical spectrometer, data processing system;The input port input of the optical circulator is connected with ASE broadband laser, the output port cir2 is connected with two cascaded FBGs, the output port cir3 is connected with EFPI optical fiber sensor, the input port of 2-way wavelength division multiplexer is connected with the output port cir4 of optical circulator, and the output port is connected with N-way wavelength division multiplexer;N-way wavelength division multiplexer is accessed via the input port of 1*2 optical fiber coupler, and outputs two-way signals, one-way is connected with N-way wavelength division demultiplexer via N-way photoelectric detector and data processing system, and the other way is connected with optical spectrometer;N channels are connected by cascaded FBG, and the cascade of N EFPI optical fiber sensors is realized.

Wireless circuitry may include a transmission line that carries a signal and a power detector that measures the signal. The detector may include a rectifier coupled to a comparator over a differential path. An offset calibrating digital-to-analog converter (OSDAC), a reference generator, and a multiplexer may be disposed on a negative line of the differential path. The OSDAC may produce an offset-compensated voltage by adding different offset voltages to a voltage on the second line over time. The reference generator may generate a set of threshold voltages by adding different reference voltages to the offset-compensated voltage. A temperature sensor may adjust the reference voltages used to generate the threshold voltages based on a temperature of the power detector. The multiplexer may route different threshold voltages to a negative input of the comparator.

Devices, systems, and methods for reconfigurable butterfly architectures are provided. A reconfigurable butterfly operator circuit includes a single multiplier configured to receive a first variable and a twiddle factor and produce a product, first and second modular subtractors coupled to the multiplier, the first modular subtractor coupled to receive input coefficients and provide a modular difference, and the second modular subtractor coupled to receive the product, a modular adder coupled to receive the input coefficients and provide a modular sum, and multiplexers coupled to (i) provide the input coefficients to the modular adder, (ii) provide the first variable and the twiddle factor to the multiplier, (iii) and receive the modular difference from the first modular subtractor, respectively, each of the multiplexers coupled to receive a control signal that selects whether the circuit is configured as a Gentleman-Sande butterfly operator circuit or a Cooley-Tukey butterfly operator circuit.

An optical communication system can include a multiplexer / demultiplexer. The multiplexer / demultiplexer can transfer a first optical data signal between a first single-mode fiber and a first propagation mode of a few-mode fiber. The first propagation mode can have a first effective refractive index. The multiplexer / demultiplexer can transfer a second optical data signal between a second single-mode fiber and a combination of a second propagation mode of the few-mode fiber and a third propagation mode of the few-mode fiber. The second propagation mode and the third propagation mode can have a same effective refractive index that differs from the first effective refractive index. During propagation within the few-mode fiber, the second optical data signal can couple bidirectionally between the second propagation mode and the third propagation mode, while being substantially isolated from the first optical data signal in the first propagation mode.

According to an embodiment, a biopotential measurement system includes an analog front-end and digital circuits. The analog front-end circuit includes a sensing electrode, a forward amplifier, and a feedback amplifier with an integration capacitor. A feature is the attenuation circuit between the forward and feedback amplifiers, which provides an attenuation factor determining the integration capacitor's value for achieving the desired high-pass corner frequency. With configurable attenuation factors, the system can process different biopotential signals. Multiple analog front-end circuits can be used to process different signals simultaneously. The digital circuit includes a processor for signal processing, dynamic adjustment of attenuation factors, and anomaly detection. Additional components like switched capacitors, pseudo-resistors, and multiplexers can enhance the system's functionality. The design allows flexible, multi-parameter physiological monitoring with adjustable frequency responses and gain settings.

Integrated cells may perform matrix multiplication (MatMul) operations. An integrated cell may include a random-access memory (RAM) cell, dot product unit(s), multiplexer(s), adder, route-in unit, control unit, and vector machine. The RAM cell may store weights and activations. The dot product unit(s) may compute dot products from the weights and activations. The adder may accumulate the dot products. The route-in unit may facilitate data transfer from the RAM cell to the dot product unit(s) or data transfer from another integrated cell to the integrated cell. The control unit may manage memory operations and detect and repair errors in memory operations. The vector machine may provide instructions to the dot product unit(s) and multiplexers to direct the flow of multiply-accumulate operations. Counters may be used to control weight fetching from RAM cells. A MatMul operation may be decomposed, and the integrated cells may perform the MatMul operation through multiple clock cycles.

The invention discloses an optical engine and a preparation method thereof. The optical engine comprises an interposer; the plurality of VCSELs are integrated on the intermediate layer through a flip-chip process and are used for emitting continuous wave laser signals with different wavelengths; the plurality of first optical waveguides are processed on the intermediate layer, each first optical waveguide comprises a light input part, an electro-optical modulation part and a light output part, the light input parts are optically coupled with the VCSEL, continuous wave laser signals are coupled into the first optical waveguides, the electro-optical modulation parts are used for performing electro-optical modulation on the continuous wave laser signals to generate first modulated wave laser signals, and the light output parts are used for outputting the first modulated wave laser signals to the VCSEL. The light output part is used for outputting a first modulated wave laser signal; and the wavelength division multiplexer is integrated on the intermediate layer and comprises a plurality of input ports and an output port, the input ports of the wavelength division multiplexer are optically coupled with the optical output part of the first optical waveguide, and the first modulated wave laser signals with different wavelengths are combined and output to an output optical fiber which is optically coupled with the output port of the wavelength division multiplexer.

The invention relates to a phase shift Bragg grating structure wavelength division multiplexer based on a barium titanate platform, and belongs to the technical field of optoelectronic integration. The device comprises a directional coupler, a multi-mode power divider, an unequal-width waveguide and a phase-shift Bragg grating, and pi / 2 phase difference is introduced to an upper arm and a lower arm through the unequal-width waveguide, so that reflected light of the phase-shift Bragg grating is converted into a TEmode; coupling the reflected TEmode to a subordinate device by using a directional coupler, and outputting transmission light in the TEmode; the transmission / reflection wavelength (the single-channel bandwidth is 0.5 nm) is changed by adjusting the grating period, and more than 10 multiplexing channels can be expanded through cascade connection. The limitation that a traditional phase shift grating only transmits output is broken through, a reflecting end multiplexing function is added, TE / TE dual-mode operation is supported, and the phase shift grating has the advantages of independent and controllable channels, low loss and flexible and adjustable wavelength, is suitable for optical communication, optical calculation and high-density optical interconnection systems, and is compatible with various material platforms such as barium titanate, lithium niobate and SOI (Silicon On Insulator).

The invention discloses an O-band harmonic mode-locked laser based on double-pumping nonlinear polarization evolution, which comprises a first pumping source, a second pumping source, a first wavelength division multiplexer, a second wavelength division multiplexer, a gain fiber, a first polarization controller, a polarization dependent isolator, a second polarization controller and a coupler, which form a bidirectional pumping ring laser resonant cavity. Wherein the first polarization controller and the second polarization controller are arranged on the two sides of the polarization dependent isolator respectively to form a nonlinear polarization evolution mode locking structure together. By improving the power of the double pumping sources and adjusting the polarization state in the cavity, switching from fundamental frequency mode locking to multi-order harmonic mode locking can be achieved, the highest order can reach 33, the repetition frequency upper limit of an O-band all-fiber mode-locked laser is broken through, and the all-fiber mode-locked laser has the advantages of being compact in structure, high in damage threshold, low in cost and easy to integrate all fibers and is suitable for the field of optical communication and the like.

The invention discloses a temperature and hydrogen concentration dual-parameter synchronous detection system and method, and the system comprises an ASE broadband light source, the output of the ASE broadband light source is divided into two paths through a coupler, one path enters a first circulator, the other path enters a second circulator, the output of the first circulator enters a first FBG sensor, the output of the second circulator enters a second FBG sensor, and the output of the first FBG sensor enters a second FBG sensor. The two FBG sensors are arranged in the gas chamber, the first FBG sensor and the second FBG sensor are provided with FBG topological optical fiber structures with different working wavelengths and have temperature sensitivity and gas selective response, and reflected signals of the two FBG sensors are coupled to one path through the dual-channel wavelength division multiplexer and are sent to the spectrum analyzer for wavelength demodulation. The temperature sensitivity and the gas selective response are integrated in the same sensing unit by utilizing the wavelength coding characteristic of the fiber bragg grating, so that precise decoupling and real-time output of double parameters are realized, and the detection efficiency and the data consistency are improved.

The invention provides a dynamic phase compensation method based on double DDS modules, and belongs to the technical field of digital frequency synthesis. The invention provides the following technical scheme: 1, a dynamic phase inheritance mechanism: through alternate work of double DDS modules, seamlessly transmitting an integer part and a decimal remainder contained in a phase accumulated value of a main DDS to a standby DDS during switching, and combining a shared clock source and a high-speed multiplexer to ensure phase continuity; 2, remainder compensation closed-loop control is carried out, a remainder accumulator is designed to record truncation errors in real time, FTW is dynamically adjusted through a PID algorithm, and long-term frequency error closed-loop suppression is achieved in combination with feedback of an external frequency meter; 3, according to a dual-mode triggering strategy, time period triggering and phase threshold triggering are supported, switching logic is started when a triggering condition (a fixed period or a phase threshold theta th is set) is met, and the phase accumulated value theta 1 (t) and the remainder epsilon 1 of the DDS1 are transmitted to the DDS2. According to the invention, through dynamic phase synchronization and closed-loop compensation, the problems of DDS phase accumulative errors and switching discontinuity are systematically solved.

A critical path tracking system for an integrated circuit (IC) is described. The system may include a real critical path with a first set of combinatorial logic receiving data and clock inputs, generating a first output. The system may include a replica critical path with a second set of combinatorial logic replicating the first set, generating a second output. Capture flip-flops (CFFs) may be coupled to paths, capturing the first and second outputs at different points. A programmable delay element may introduce adjustable delays to the second output. A multiplexer may select between the first and delayed outputs for the CFFs, and a comparator may generate a path_failure_signature by comparing the outputs. A control circuit may dynamically adjust the delay settings and the IC's supply voltage based on the path failure signature. A software loop may read the signature, analyze timing margins, and control the circuit.

The application relates to a non-volatile D flip-flop circuit. The non-volatile D flip-flop circuit formed by adopting the architecture mode of a latch circuit module, a self-enabled write circuit module, a non-volatile storage unit module, a read circuit module and a multiplexer module has only one working mode, so that the application has the characteristic of simple control timing. The self-enabled write circuit module and the non-volatile storage unit module arranged in the non-volatile D flip-flop circuit can realize real-time backup while reducing energy consumption.

Electric Vehicle Charging Installation and Station The present invention relates to an electric vehicle charging installation (12), the charging installation (12) comprising: - a first number of charging points (20), - a second number of charging interfaces (24), each charging interface (24) having a connector adapted to be connected to an electric vehicle to enable the charging of the electric vehicle, the second number being strictly greater than the first number, - a multiplexer (26) adapted to connect the charging interfaces (24) to at least one charging point (20), and - a control unit (28), the control unit (28) being adapted to receive charging instructions from an electric vehicle via an external control system (14) and to control the multiplexer (26) and at least one charging point (20) according to the instructions of the external control system (14). Figure for the abstract: Figure 1

This invention discloses a multi-wavelength Brillouin and Raman random fiber laser based on tunable broadband Raman pumping, comprising a 1.5μm Brillouin pump, a 1.45μm tunable broadband Raman pump, a wavelength division multiplexer (WDM) I, and a passive fiber. The 1.45μm tunable broadband Raman pump includes a wavelength-tunable cascaded random Raman fiber laser, a WDM II, and a single-mode fiber I. The wavelength-tunable cascaded random Raman fiber laser is injected into the single-mode fiber I through the WDM II. This multi-wavelength Brillouin and Raman random fiber laser based on tunable broadband Raman pumping provides a 1.45μm tunable broadband Raman pump source by back-Raman amplification of the broadband seed light. Working together with the 1.5μm Brillouin pump, it can achieve ultra-wideband multi-wavelength random fiber laser output. By simultaneously tuning the output wavelengths of the Brillouin pump and the Raman pump, wavelength tuning of the broadband multi-wavelength random fiber laser can be achieved.

The present disclosure relates to ADC data processing circuitry for touch controllers. According to one embodiment, a signal processing circuit includes a coefficient accumulator and a dual multiplexer path for processing invalid ADC samples in a touch controller. When an ADC sample exceeds a saturation threshold, the circuit selects a zero value through one multiplexer while accumulating a coefficient through the other multiplexer path. Upon receiving a first valid sample, the circuit multiplies it with the accumulated coefficient and then resumes normal coefficient processing. This architecture enables continuous processing across multiple touch sensor channels without the need for buffering while maintaining mathematical equivalence through multiplication distribution rates.

The utility model belongs to the technical field of optical fiber lasers, and relates to a multi-wavelength random optical fiber laser based on a four-port circulator and Brillouin-Rayleigh scattering, which is a closed-loop random optical fiber laser and comprises the four-port circulator, a seed laser is connected with the first port of the four-port circulator, and a seed laser is connected with the second port of the four-port circulator. The second port is connected with the Brillouin gain optical fiber, the third port is connected with the random Rayleigh scattering optical fiber, and the fourth port is connected with the optical fiber coupler; an erbium-doped fiber and a wavelength division multiplexer are connected between the Brillouin gain fiber and the fiber coupler, and a pump light port of the wavelength division multiplexer is connected with an output port of the 980nm laser. According to the utility model, the Brillouin gain optical fiber is subjected to Brillouin scattering, and the Rayleigh scattering of the random Rayleigh scattering optical fiber and the gain amplification of the erbium-doped optical fiber are combined, so that efficient and stable multi-wavelength output is realized, the number of output wavelengths is adjustable, the stability is high, and the device is suitable for a high-precision optical fiber sensing and dense wavelength division multiplexing system.

The invention discloses a surface acoustic wave filter and a multiplexer surface acoustic wave filter, and the surface acoustic wave filter comprises a first piezoelectric substrate and a first interdigital transducer which is arranged on the first piezoelectric substrate. The first interdigital transducer comprises a first bus bar, a second bus bar, a plurality of first electrode fingers and a plurality of second electrode fingers, the first bus bar and the second bus bar are oppositely arranged, the first electrode fingers are led out from the first bus bar and extend towards the second bus bar, the second electrode fingers are led out from the second bus bar and extend towards the first bus bar, and the first electrode fingers and the second electrode fingers are arranged at intervals; the plurality of first electrode fingers and the plurality of second electrode fingers are mutually overlapped to form a first overlapping area, and the boundary shape of the first overlapping area conforms to a trigonometric function curve in the sound wave propagation direction; and the shapes of the first bus bar and the second bus bar are matched with the boundary shape of the first overlapping region. The technical effects that the transverse mode can be inhibited, and the small-size surface acoustic wave filter can be realized are achieved.

The application provides a wavelength division multiplexer and a silicon optical chip, which comprises a first unit and at least one second unit; the first unit is connected with each second unit through a first waveguide; an output port and a plurality of output ports are arranged on the same side of the first unit; the first unit and the plurality of second units are each provided with a wavelength interleaver; the wavelength interleaver comprises a homogeneous waveguide and a heterogeneous waveguide; the heterogeneous waveguide comprises a main body composed of a first material; a gap is arranged in the main body; the gap is filled with a second material; along the propagation direction of input light, the wavelength interleaver is provided with an input section, an input coupling section, a phase difference accumulation section, an output coupling section and an output section; the effective refractive index of the homogeneous waveguide and the effective refractive index of the heterogeneous waveguide in the phase difference accumulation section are different. The wavelength division multiplexer can be applied to the manufacture of optoelectronic devices, such as a silicon optical chip. The first unit and the second unit are in a folded layout, so that the layout of the wavelength division multiplexer on the chip is compact and modular.

The invention provides a receiving module, an operation method thereof and user equipment using the receiving module. The receive module includes a plurality of IF paths associated with the plurality of RF paths, at least one multiplexer (MUX), and at least one power detector (PD). Each IF path includes a transimpedance amplifier (TIA) and a low pass filter (LPF). The LPF is coupled to an output of the TIA. The at least one multiplexer is coupled to the plurality of IF paths. At least one power detector (PD) selectively couples at least two of the IF paths through at least one multiplexer to alternately detect signal strength of respective nodes between the TIA and the LPF in the respective IF paths. The at least two IF paths are associated with at least two RF paths of the plurality of RF paths having the same carrier frequency.

In an example aspect, an optical switch provided. The optical switch comprises a plurality of reconfigurable add / drop multiplexers (ROADMs), each comprising a plurality of optical line ports and a plurality of add / drop ports. The optical switch also comprises a connection apparatus connecting, for each ROADM, each add / drop port of the ROADM to a port of each of a respective one or more other ROADMs. In another example aspect, a method of configuring an optical switch is provided.