Abstract: An aza-ergoline derivative and a preparation method therefor and an application thereof. The derivative has a structure as shown in formula (I). The aza-ergoline derivative has good affinity, agonistic activity or selectivity to a dopamine D2 receptor.

Abstract: Methods and apparatus for storing a control voltage of a phased-locked loop (PLL) when switching from mission mode to standby mode for the PLL, and for restoring the control voltage of the PLL when switching back to mission mode. An example PLL circuit includes a charge pump, a voltage-controlled oscillator (VCO) having a control input coupled to an output of the charge pump via a node, and a tracking circuit coupled to the node. The tracking circuit is generally configured to sample a voltage of the node during a mission mode, save a representation of the sampled voltage before entering a standby mode, and restore the sampled voltage to the node for reentering the mission mode using the saved representation of the sampled voltage.

Abstract: Aspects of the present disclosure provide techniques and apparatus for synchronizing phase-locked loop (PLL) circuits. An example method of operating PLL circuits includes obtaining an indication to perform a synchronizing action at a first PLL circuit and a second PLL circuit; and performing the synchronizing action at the first PLL circuit and the second PLL circuit in response to obtaining the indication.

Abstract: The present disclosure provides a photonics-aided vector terahertz signal communication system. The system includes an optical frequency comb generation module, a vector terahertz signal generation module, an optical fiber transmission module, a vector terahertz signal detection module, and a vector terahertz signal emission module that are sequentially connected, where the vector terahertz signal generation module includes a first binary sequence generator, a first electronic amplifier, and a first intensity modulator that are sequentially connected, the first binary sequence generator generates binary data representing to-be-transmitted data, the first intensity modulator performs, based on the binary data, amplitude modulation on an optical frequency comb entering the first intensity modulator, and an optical signal obtained after the modulation of the first intensity modulator is a vector terahertz signal carrying the to-be-transmitted data.

Abstract: A latch for a closure panel of a vehicle comprising: a housing; a ratchet pivotally mounted the housing for moving between an open position and a primary position; a pawl pivotally mounted on the housing, the pawl biased towards the ratchet for holding the ratchet in a secondary position and in the primary position, the secondary position located between the open position and the primary position; and a position sensor for detecting a first position of the ratchet when at the primary position as well as a second position when the ratchet is at the secondary position.

Abstract: An ultrasonic cleaning tool for cleaning a surface has a transducer and a horn for generating and transmitting vibrations to a surface to be cleaned. Cleaning solution can be supplied to the ultrasonic cleaning tool or the surface to be cleaned, and operation of the ultrasonic cleaning tool can agitate the surface and cleaning solution. The tool can be provided as part of a system for cleaning a surface, and the system can include an extraction cleaner or a cleaning cloth.

Abstract: An aspect relates to an apparatus including an input buffer including an input configured to receive an input voltage; a ramp voltage generator including an input coupled to an output of the input buffer; an evaluation circuit including an input coupled to an output of the ramp voltage generator, wherein the evaluation circuit includes a first resistor coupled in series with first field effect transistor (FET) between a first voltage rail and a second voltage rail; and an output buffer including an input coupled to a drain of the first FET and an output configured to generate an output voltage.

Abstract: An ultrasonic cleaning tool for cleaning a surface has a transducer and a horn for generating and transmitting vibrations to a surface to be cleaned. Cleaning solution can be supplied to the ultrasonic cleaning tool or the surface to be cleaned, and operation of the ultrasonic cleaning tool can agitate the surface and cleaning solution. The tool can be provided as part of a system for cleaning a surface, and the system can include an extraction cleaner or a cleaning cloth.

Abstract: An aspect relates to an apparatus including an input buffer including an input configured to receive an input voltage; a ramp voltage generator including an input coupled to an output of the input buffer; an evaluation circuit including an input coupled to an output of the ramp voltage generator, wherein the evaluation circuit includes a first resistor coupled in series with first field effect transistor (FET) between a first voltage rail and a second voltage rail; and an output buffer including an input coupled to a drain of the first FET and an output configured to generate an output voltage.

Abstract: A lock device of a vehicle comprising: a base plate; a guide plate rotatably disposed on the base plate; a pawl rotatably disposed on the base plate, the pawl being engageable with the guide plate in an unlocking position and disengageable from the guide plate between a half-locked and fully-locked position; a ratchet rotatably disposed on the base plate for retaining a striker when in the half-locked or the fully-locked position when the pawl is engaged with the ratchet; and a release member rotatably disposed on the base plate, the release member engagable with the guide plate; the release member is configured to drive the guide plate to engage with the pawl and drive the pawl to decouple from the ratchet.

Abstract: A method of quantization noise cancellation in a phase-locked loop (PLL) is provided according to certain aspects. The PLL includes a phase detector having a first input configured to receive a reference signal and a second input configured to receive a feedback signal. The method includes delaying the reference signal by a first time delay, delaying the feedback signal by a second time delay, receiving a delta-sigma modulator (DSM) error signal, and adjusting the first time delay and the second time delay in opposite directions based on the DSM error signal.

Abstract: A frequency synthesizer system may include a first voltage-controlled oscillator (VCO) circuit, a second VCO circuit, and multiplexing circuitry. The multiplexing circuitry may be configured to select either the output of the first VCO circuit or the output of the second VCO circuit in response to a mode selection signal.

Abstract: Methods, systems and devices for reducing pattern effects in pulse amplitude modulation (PAM) signals in semiconductor optical amplifiers (SOAs) are described. One method for digital communication includes generating, based on (2M+1) N-level PAM (PAM-N) symbols, an index corresponding to an entry of a look-up table (LUT) that comprises adjustment values, wherein M and N are integers, determining, based on the index, a selected adjustment value from the LUT, generating a pre-distorted PAM-N symbol based on a difference between a center symbol of the (2M+1) PAM-N symbols and the selected adjustment value, and generating, using an SOA, a waveform that includes the pre-distorted PAM-N symbol.

Abstract: The present disclosure provides a sweeper that includes a fluid delivery system for providing cleaning fluid to a floor surface. The sweeper can be configured to perform multiple cleaning functions, including wet mopping and dry sweeping. The sweeper can have a collection cup and a microfiber brushroll which mechanically propels dirt and liquid from the surface to be cleaned into the collection cup.

Abstract: A lifting table includes a lifting mechanism, a base, an upper tabletop and a tabletop mounting frame assembly; the lifting mechanism includes a plurality sections of lifting columns and a controller, and the lifting columns are matched and connected with one another; the base is installed at a bottom of the lifting mechanism, the controller is hidden in the base and connected with buttons on the tabletop mounting frame assembly; the upper tabletop and the tabletop mounting frame assembly are both installed on lifting columns, and the tabletop mounting frame assembly is located below the upper tabletop; through selection of buttons on the tabletop mounting frame assembly, a signal is sent to the controller so that the controller drives the lifting columns to stretch out or draw back and hence to drive the upper tabletop and the tabletop mounting frame assembly to raise up or lower down.

Abstract: Phase imbalance between in-phase (I) and quadrature (Q) components of an optical communications signal causes signal degradation that can result in degraded bit-error rate performance, increased power requirements, and reduced transmission distance. The signal degradation can be expressed as a reduced signal to noise and interference ratio. The disclosed system and techniques monitor the phase imbalance between the I and Q channels and provides for adjustment of the phase of one or more of the I and Q channels to improve overall performance.

Abstract: A communication receiver receives a signal sample stream of an orthogonal frequency division multiplexing (OFDM) signal, splits the signal sample stream into blocks, where each block corresponds to a symbol or a gap of the OFDM signal, determines an estimate of a periodic noise in the OFDM signal by averaging signal samples over a number of blocks, generates a noise-suppressed signal by subtracting the estimate of the periodic noise from the signal sample stream, and performs further receiver-side processing on the noise-suppressed signal.

Abstract: A method of communication is disclosed. The method includes receiving a polarization optical signal comprising multiple polarization components via an optical signal transmission fiber, splitting the polarization optical signal into multiple optical signals, each corresponding to one of the polarization components, converting the multiple optical signals to corresponding multiple electrical signals, multiplexing, in an electrical domain, the multiple electrical signals to generate a multiplexed electrical signal, and performing a wireless transmission of the multiplexed electrical signals using a single antenna.

Abstract: A method of digital communication is described. The method includes generating a first orthogonal frequency division multiplexed (OFDM) signal from a first portion of information bits received at the communication apparatus, generating a second OFDM signal from a second portion of information bits received at the communication apparatus, generating a first input for a modulator using the first OFDM signal and the second OFDM signal, generating a second input for the modulator using the second OFDM signal and the second OFDM signal, and operating the modulator to produce a modulated signal from the first input and the second input.

Abstract: An optical transmitter apparatus is disclosed. The apparatus includes a processor, a memory coupled to the processor, and one or more programs configured to be executed by the processor. The programs include instructions for nonlinearity estimation that characterizes nonlinearity in an optical communication and estimates an amount of symbol distortion caused by the nonlinearity, instructions for selecting and mapping symbols to provide, for the nonlinearity estimation, only symbols that meet predetermined nonlinearity criteria, and instructions for storing, in the memory, the amount of symbol distortion to be used for a nonlinearity pre-compensation.