Abstract: A transmission line phase shifter, a chip, and a radar sensor are provided. The transmission line phase shifter includes at least one transmission line phase-shifting unit. At a calibration stage, a preset number of transmission line phase-shifting units are configured to be in a state of a first phase or in a state of a second phase and configured to output an output RF signal, such that phase calibration information of each transmission line phase-shifting unit is determinable. At an operation stage, the phase adjusting circuit of the respective transmission line phase-shifting unit is configured to receive a corresponding phase shifting control signal and to adjust the respective transmission line phase-shifting unit, to enable the respective transmission line phase-shifting unit to shift a phase of an input RF signal by a calibrated first phase or a calibrated second phase.

Abstract: Provided are a solder ball detecting device, a radar sensor, a radar chip and an electronic equipment. A signal pin of a radar chip is fixed to a printed circuit board by a solder ball. The solder ball detecting device include: a sampling unit, configured to collect a sampled signal from a circuit loop that includes the solder ball; and a detecting unit, configured to detect the sampled signal and to output state information reflecting a welding state of the solder ball based on the sampled signal, where the radar chip is configured to transmit critical signals of the related to object detection via the signal pin and the solder ball.

Abstract: A radar system and control method thereof is disclosed. The radar system comprises a plurality of radar units, each comprising: one or more radio frequency (RF) channels configured to receive a reflected signal and then generate an analog input signal according to the reflected signal; and a processing module connected with all the RF channels and configured to sample the analog input signal to obtain a digital signal and perform the first digital signal processing on the digital signal to obtain intermediate data, wherein when the plurality of radar units work jointly, a designated radar unit performs the second digital signal processing on the plurality of intermediate data provided by the plurality of radar units, thereby obtaining result data of the radar system.

Abstract: A semiconductor integrated circuit, a phase-locked loop, a radar sensor and an electronic device. The semiconductor integrated circuit comprises a substrate layer, and a plurality of insulated metal layers arranged on the substrate layer, wherein the plurality of metal layers comprise a shielding structure layer, a first device structure layer and a plurality of second device structure layers. The semiconductor integrated circuit contains an oscillator for outputting differential signals, and contains: a first inductor and a second inductor formed in different second device structure layers; a capacitor device formed in the first device structure layer; and a first transistor and a second transistor formed in the substrate layer, wherein the first inductor and the second inductor are symmetric about the same axis of symmetry, and the shielding structure layer is provided with a shielding structure for shielding interference signals leaked by the first inductor and/or the second inductor.

Abstract: A charge pump, a phase-locked loop, a radar sensor, and an electronic device. The charge pump is applicable to the phase-locked loop. The charge pump comprises a discharging circuit and a charging circuit, both of which are connected to an output end of the charge pump. The discharging circuit reduces a current of the output terminal under control of a first control signal, the charging circuit increases it under control of a second control signal, the first control signal and the second control signal being corresponding to error signals between the two clock signals. The charge pump further comprises a voltage control circuit connected to a first node in the discharging circuit and/or a second node in the charging circuit to maintain the locked state of the phase-locked loop by controlling voltages of corresponding nodes, the first node and the second node being both connected to the output end.

Abstract: A radio frequency (RF) inverter, a transmission line phase shifter, a system, a chip, and a radar sensor are provided. The RF inverter includes an inductance circuit and a first phase adjusting circuit that both are arranged symmetrically along a same symmetry axis. The inductance circuit includes a single-ended signal interface and a differential signal interface. The first phase adjusting circuit includes two controlled switches, and each controlled switch is connected between the ground wire and a corresponding ground terminal of a pair of ground terminals in the single-ended signal interface, to enable the inductance circuit to perform in-phase or inverting phase shifting on a received RF signal.

Abstract: Provided are a triarylamine compound and an organic electroluminescent device thereof, which specifically relate to the field of organic electroluminescent materials. The triarylamine compound has high hole mobility, good thermal stability and great film formability, and when applied to the hole transport layer of an organic electroluminescent device, can reduce the energy potential barrier in a hole injection process, improve hole injection efficiency so that the hole transport rate is balanced with electron transport, increase the recombination probability of excitons in a light-emitting layer, and achieve the maximum recombination of carriers, thereby improving the luminescence efficiency of the device and extending the lifetime of the device. Therefore, the compound has great application and commercial values in the application of OLED devices and possesses a good industrialization prospect.

Abstract: A matching network of a radio frequency signal, a mixer, a phase shifter, a radar sensor and an electronic apparatus. The matching network of the radio frequency signal includes a first inductor (L1) having an I input terminal, a second inductor (L2) having a Q input terminal, and a third inductor (L3) inductively coupled to both the first inductor and the second inductor, the third inductor has an output terminal; wherein the I input terminal is configured to receive a radio frequency signal of an I channel, and the Q input terminal is configured to receive a radio frequency signal of a Q channel.

Abstract: Provided are a fluorene-containing triarylamine compound and an organic electroluminescent device thereof, which relate to the technical field of organic electroluminescent materials. The fluorene-containing triarylamine compound has a good hole transporting ability, a proper HOMO energy level, and good film formability and stability. When used in the organic electroluminescent device as a hole transporting material, the fluorene-containing triarylamine compound can balance electrons and holes in the device, improve recombination efficiency of electrons and holes in a light-emitting layer, effectively reduce a drive voltage of the device, improve luminescence efficiency of the device, and prolong a service life of the device and can be applied to fields such as display, lighting, and organic solar cells.

Abstract: A chemical mechanical polishing slurry, including silicon dioxide particles, a nitrogen-containing heterocyclic compound having one or more carboxy group(s), and an ethoxylated butoxylated alky alcohol, and use of the chemical mechanical polishing slurry in the polishing silicon oxide, polysilicon, and silicon nitride. Polishing rate for silicon nitride using the polishing slurry is much higher than that for silicon oxide and polysilicon. The polishing slurry can be applied to chemical mechanical polishing in which silicon oxide/polysilicon is used as the stop layer, and can be used to control the amount of oxide and polysilicon removed from the substrate surface during polishing.

Abstract: The present disclosure provides a phase-locked loop, a radio frequency transmitter, a radar sensor and an electronic device. The phase-locked loop includes a phase-locked loop circuit, a charge compensation circuit and a digital modulation controller. The phase-locked loop circuit is connected to the charge compensation circuit. The digital modulation controller is connected to the phase-locked loop circuit and configured to output a frequency control signal so as to cause the phase-locked loop circuit to generate a valid interval of a frequency modulated signal in accordance with the frequency control signal. The digital modulation controller is further connected to the charge compensation circuit and configured to control the charge compensation circuit to regulate charges in the phase-locked loop circuit during an invalid interval of the frequency modulated signal to shorten a duration of frequency callback of the frequency modulated signal.

Abstract: Disclosed are a frequency multiplier, a signal transmitter and a radar chip. The frequency multiplier includes a signal generator that is configured to receive an FMCW signal and output a square wave signal at a frequency same as a frequency of the FMCW signal; and a third harmonic amplifier that is coupled to the signal generator and is configured to amplify a third harmonic wave in the square wave signal and output a frequency-tripled FMCW signal. The above-mentioned solution can improve the generation efficiency of the frequency-tripled signal.

Abstract: A calibration circuit and a calibration method for a phase shifter, a phase-shift circuit, a radio frequency transmitting circuit, a radio frequency receiving circuit, a radar sensor and an electronic device are provided. The calibration circuit for the phase shifter includes a phase acquisition circuit and a phase calibration circuit, the phase acquisition circuit coupled to the phase shifter is configured to modulate a radio frequency sample signal acquired from the phase shifter using a first baseband signal, down-convert the modulation signal to obtain a second baseband signal containing an actual phase; the phase calibration circuit coupled to the phase acquisition circuit is configured to acquire the actual phase in the second baseband signal, determine calibration phase information according to a phase deviation between the actual phase and a preset phase-shift phase, generate a phase-shift control signal according to calibration phase information and transmit it to the phase shifter.

Abstract: Embodiments of the present disclosure disclose a phase-locked loop, a radar system and a method for randomizing initial phases of FMCW signals. The phase-locked loop includes a phase-locked loop circuit and a random control signal generator. In response to a clock signal indicating a respective target moment of one or more target moments, the random control signal generator inputs a random control signal to the phase-locked loop circuit, so that the accumulated value of the plurality of fractional frequency division values is converted into a random value, and that a plurality of phase differences respectively corresponding to the plurality of chirp signals form a non-arithmetic sequence.

Abstract: Disclosed are a frequency multiplier, a signal transmitter and a radar chip. The frequency multiplier includes a signal generator that is configured to receive an FMCW signal and output a square wave signal at a frequency same as a frequency of the FMCW signal; and a third harmonic amplifier that is coupled to the signal generator and is configured to amplify a third harmonic wave in the square wave signal and output a frequency-tripled FMCW signal. The above-mentioned solution can improve the generation efficiency of the frequency-tripled signal.

Abstract: A phase shifting system, a chip, and a radar sensor are provided. A respective transmission line phase-shifting unit is configured to receive at least one phase shifting control signal and to shift a phase of a RF signal by a first phase or a second phase. Each transmission line phase-shifting unit includes a first group of transmission lines and a second group of transmission lines. At least some transmission lines in the first group of transmission lines of each transmission line phase-shifting unit are physically isolated from at least some transmission lines in the first group of transmission lines of an adjacent transmission line phase-shifting unit and transmission lines of the second group of transmission lines of each transmission line phase-shifting unit are coupled to respective transmission lines of the second group of transmission lines of an adjacent transmission line phase-shifting unit.

Abstract: A transmission line phase shifter, a system, a chip, and a radar sensor are provided. The transmission line phase shifter includes at least one transmission line phase-shifting unit. A respective transmission line phase-shifting unit includes a first pair of differential transmission lines, a second pair of differential transmission lines, and a phase adjusting circuit. The phase adjusting circuit is configured to adjust electrical parameters of a transmission path where at least one pair of transmission lines of the first pair of differential transmission lines and the second pair of differential transmission lines is located according to at least one phase shifting control signal received, so as to enable that a RF signal output from the respective transmission line phase-shifting unit has a phase shift of a first phase or a second phase relative to an input RF signal of the respective transmission line phase-shifting unit.

Abstract: A transmission line phase shifter, a chip, and a radar sensor are provided. The transmission line phase shifter includes at least one transmission line phase-shifting unit. At a calibration stage, a preset number of transmission line phase-shifting units are configured to be in a state of a first phase or in a state of a second phase and configured to output an output RF signal, such that phase calibration information of each transmission line phase-shifting unit is determinable. At an operation stage, the phase adjusting circuit of the respective transmission line phase-shifting unit is configured to receive a corresponding phase shifting control signal and to adjust the respective transmission line phase-shifting unit, to enable the respective transmission line phase-shifting unit to shift a phase of an input RF signal by a calibrated first phase or a calibrated second phase.

Abstract: A radio frequency (RF) inverter, a transmission line phase shifter, a system, a chip, and a radar sensor are provided. The RF inverter includes an inductance circuit and a first phase adjusting circuit that both are arranged symmetrically along a same symmetry axis. The inductance circuit includes a single-ended signal interface and a differential signal interface. The first phase adjusting circuit includes two controlled switches, and each controlled switch is connected between the ground wire and a corresponding ground terminal of a pair of ground terminals in the single-ended signal interface, to enable the inductance circuit to perform in-phase or inverting phase shifting on a received RF signal.

Abstract: The present invention discloses a chemical mechanical polishing slurry, and the chemical mechanical polishing slurry comprises silica abrasive particles and accelerating agents, wherein the accelerating agents are selected from pyridine compound, piperidine compound, pyrrolidine compound or pyrrole compound and their derivatives, which have one or more carboxyl groups, and pyrimidine compound and its derivatives, which have one or more amino groups. The chemical mechanical polishing slurry can simultaneously increase the removal rate of both silicon nitride and polysilicon.