Abstract: A capacitive analog-to-digital converter, an analog-to-digital conversion system, a chip, and a device. The capacitive analog-to-digital converter includes: a first capacitor array, including N first capacitor banks that include M first capacitors, where M is a positive integer greater than N; M first switches, respectively connected to first electrode plates of the M first capacitors in a one-to-one correspondence to enable a successive approximation logic controller to control connections of the first electrode plates of the M first capacitors with an output of a voltage generation circuit and with a first sampling voltage output by controlling the M first switches; a comparator, including a first input, a second input and an output; and the successive approximation logic controller, connected to the output of the comparator, and configured to control the M first switches according to comparison results output by the output of the comparator.

Abstract: Provided are a multi-sensor-based under-screen fingerprint capturing method and system and an electronic device, where the method is applied to an under-screen fingerprint capturing system including multiple fingerprint sensors, and includes: acquiring fingerprint information of a user captured by the multiple fingerprint sensors, where each fingerprint sensor corresponds to a sensing region, and sensing regions corresponding to the multiple fingerprint sensors form a fingerprint capturing region of the under-screen fingerprint capturing system; and determining an effectively pressed fingerprint sensor among the multiple fingerprint sensors according to the fingerprint information of the user, where the fingerprint information of the user captured by the effectively pressed fingerprint sensor is used for fingerprint authentication of the user.

Abstract: Provided are a fingerprint identification device, a fingerprint identification method and an electronic device, which could improve security of fingerprint identification. The fingerprint identification device includes an optical fingerprint sensor including a plurality of pixel units; at least two filter units disposed above at least two of the plurality of pixel units, where each filter unit corresponds to one pixel unit, and the at least two filter units comprise filter units in at least two colors.

Abstract: A method for transmitting information, a communication device, a portable device and a communication system are provided. The method is applied to a portable device; and the method includes: receiving and/or transmitting information in an electric field coupling manner through a first coupling electrode disposed at the portable device and a second coupling electrode at an opposite end. In an embodiment of the present application, the information is received and/or transmitted through an electric field coupling manner, which could not only improve communication quality and connection reliability on the basis of reducing communication power consumption of a portable device (such as an earphone or a charging case), but also reduce a volume of the portable device, simplify a structure and further improve user experience.

Abstract: Provided are a backlight module, an under-screen fingerprint identification method, apparatus and an electronic device. The under-screen fingerprint identification apparatus is applied to an electronic device having a backlight module, and includes: a fingerprint identification module disposed under the backlight module and configured to receive an infrared light signal passing through the backlight module that is emitted by an infrared light source and illuminates a human finger, where the infrared light signal is used to detect fingerprint information of the finger; where a haze of the infrared light signal passes through the backlight module is less than a haze of visible light for displaying an image passes through the backlight module. The under-screen fingerprint identification apparatus of embodiments of the present application could effectively implement under-screen fingerprint identification of a passive light-emitting display screen.

Abstract: A fingerprint sensor and a terminal device are provided. The fingerprint sensor includes a plurality of integration circuits (110) and a negative feedback circuit (120); the negative feedback circuit (120) is connected to the plurality of integration circuits (110) for respectively fixing an input common mode voltage of each of the integration circuits (110) as a reset bias voltage when the plurality of integration circuits (110) are in a reset phase; and each of the integration circuits (110) corresponds to a fingerprint capacitor respectively, and the integration circuit (110) is configured to perform integration processing on a charge of the corresponding fingerprint capacitor when in an integration phase, and output an output voltage related to the fingerprint capacitor. A fingerprint sensor and a terminal device of the present application could improve an SNR of a fingerprint image without increasing resources of a main control RAM.

Abstract: A capacitance detection method of a touch display panel, a capacitance detection circuit, and an electronic device are provided. The method includes: receiving a real-time sync signal sent from a display panel, and generating a trigger signal in a period in which a display driving noise is avoided based on the real-time sync signal (S1); generating a sync driving signal in the period in which the display driving noise is avoided based on the received trigger signal, to drive a driving electrode of the touch display panel (S2); and detecting a signal value of a capacitance sensor in the touch display panel in the period in which the display driving noise is avoided based on the received trigger signal (S3). This method is little affected by the display driving operation, and improves the signal-to-noise ratio (SNR) of a finally detected effective signal, thus greatly improving the touch sensitivity.

Abstract: A converter circuit is disclosed. The converter circuit includes a controller configured to operate a pull up component and a pull down component so as to deliver power to a load through an inductor. The controller is configured to operate in either of first and second operational modes based on average current delivered to the load. The converter circuit also includes a mode control circuit configured to change operational modes in response to an indication of current flowing from the inductor to the switch node, and in response to an indication that the average current delivered to the load is greater than the current threshold.

Abstract: Provided are a fingerprint identification apparatus and an electronic device. The fingerprint identification apparatus is applicable to an electronic device having a display screen, and includes: a fingerprint sensor chip; and a substrate, where an upper surface of the substrate extends downward to form a first groove, and at least a portion of the fingerprint sensor chip is disposed in the first groove and electrically connected to the substrate. By disposing at least a portion of the fingerprint identification sensor in the first groove, not only could costs and complexity of the electronic device be reduced, but also a thickness of the fingerprint identification apparatus could be effectively reduced.

Abstract: Provided are a method and apparatus for fingerprint identification and an electronic device, which could increase a speed of fingerprint identification. The method is applied to an electronic device including M fingerprint sensors, and the method includes: acquiring pressing information of a finger in a fingerprint detecting region; determining a target sub-region among N sub-regions according to the pressing information, where the N sub-regions cover the fingerprint detecting region, M and N are positive integers greater than 1, and N>M; and determining a data acquiring region according to the target sub-region, where fingerprint data in the data acquiring region is used for fingerprint identification.

Abstract: The present application provides a data synchronization method, a device, and a storage medium, where a wireless communication network includes: a master device and N slave devices, and the method is applied to any slave device of the N slave devices and includes: a slave device receives a data packet transmitted by the master device, the data packet including a preamble; the slave device determines a receiving termination time of the preamble, and determines, according to the receiving termination time of the preamble and a delay time configured by the master device for the slave device, a synchronization time with other slave devices in the N slave devices, thereby achieving data synchronization between the slave devices.

Abstract: A processor circuit is disclosed. The processor circuit includes a data path block circuit configured to perform a data path operation to generate one or more results. The processor circuit also includes a data register files circuit, having a first register file, where the first register file has a first quantity of read and write ports. The data register files circuit also includes a second register file, where the second register file has a second different quantity of read and write ports. The processor circuit also includes an instruction decoder circuit configured to provide an operation signal to the data path block circuit, where the operation signal identifies a particular data path operation to be performed by the data path block circuit and identifies one or more read ports of the data register files circuit for retrieving data encoding the first and second operands.

Abstract: A digital calibration method, a device, and a true random number generator circuit are provided. In one aspect, the embodiment of the present disclosure uses the digital calibration method to calibrate compensation of a circuit to be calibrated, output of the circuit to be calibrated is sampled and tested multiple times, and whether a current test compensation calibration code value can make the circuit to be calibrated meet specified accuracy is judged based on a probability that the output result is a target result. Through sampling the output of the circuit to be calibrated multiple times, the selected compensation calibration code has higher accuracy.

Abstract: An under-screen optical fingerprint recognition system, a backlight module, a display screen, and an electronic device are provided. The under-screen optical fingerprint recognition system is applied to a display screen with a backlight module, the under-screen optical fingerprint recognition system includes a fingerprint recognition chip and a first light source, the wavelength of fingerprint detecting light emitted by the first light source is within a preset wavelength range, the fingerprint recognition chip is arranged below the backlight module for receiving light carrying fingerprint information that passes through the backlight module and has a diffusivity smaller than or equal to a set threshold, and the light carrying fingerprint information is reflected by a finger from the light emitted by the first light source. The system may be applied to a display screen with a backlight module to meet the requirements of the LCD screen for under-screen fingerprint recognition.

Abstract: The present disclosure relates to the field of touch technology, and provides a touch control chip, an electronic device and a touch detection method. The touch control chip (1) includes: a processing unit (10), a floating ground driving module (11) and an analog front end (12); the floating ground driving module (11) is connected to the analog front end (12), a detection end of the analog front end (12) is connected to a capacitive sensing component (3), and an output end of the analog front end (12) is connected to the processing unit (10); the processing unit (10) is configured to control the floating ground driving module (11) to provide a floating ground signal to the analog front end (12), the floating ground signal is used to enable the capacitive sensing component (3) to generate a sensing signal, the processing unit (10) performs touch detection according to the sensing signal.

Abstract: A biological data detection method and a biological data detection device are provided. The method determines a variation in light intensity in an ambient environment encompassing a sensing unit at a biological characteristic matching stage compared to a biological characteristic registration stage, the sensing unit having a first value of a parameter at the biological characteristic matching stage and a second value of the parameter at the biological characteristic registration stage; obtaining the first value relative to the second value based on the variation in light intensity in an ambient environment such that image clarity and/or image noise of the biological image generated at the biological characteristic matching stage approximates image clarity and image noise of a biological image generated at the biological characteristic registration stage. The parameter of the sensing unit includes an exposure time and/or an ADC gain coefficient.

Abstract: Provided are a method and apparatus for fingerprint identification and an electronic device, which could increase a speed of fingerprint identification. The method is applied to an electronic device including M fingerprint sensors, and the method includes: acquiring pressing information of a finger in a fingerprint detecting region; determining a target sub-region among N sub-regions according to the pressing information, where the N sub-regions cover the fingerprint detecting region, M and N are positive integers greater than 1, and N>M; and determining a data acquiring region according to the target sub-region, where fingerprint data in the data acquiring region is used for fingerprint identification.

Abstract: Embodiments of the present disclosure provide a burning apparatus and system. The burning apparatus includes: a processor, a wireless communication module, at least one peripheral interface, and a memory; the processor is electrically connected to the wireless communication module, the peripheral interface, and the memory, respectively; the memory is configured to store to-be-burned firmware and a system program required for operating the burning apparatus; the processor is configured to start the system program to control the wireless communication module to be wirelessly connected to a terminal device, and receive, through the wireless communication module, the to-be-burned firmware transmitted by the terminal device; and the processor is also configured to be electrically connected to at least one target board through the at least one peripheral interface, and write the to-be-burned firmware to the at least one target board through the at least one peripheral interface.

Abstract: A duty cycle correction circuit includes: a first inverter, a first delayer, and a first adjustment circuit. An input terminal and output terminal of the first inverter are respectively configured to receive a first signal and output a third signal. A first input terminal and an output terminal of the first adjustment circuit are respectively configured to receive the third signal and output a first correction signal. An input terminal and output terminal of the first delayer are respectively configured to input a second signal and output a fourth signal to the first adjustment circuit. The fourth signal has a first delay time relative to the second signal. When the third signal and the fourth signal are at a high level, so is the first correction signal. When the third signal and the fourth signal are at a low level, so is the first correction signal.

Abstract: An integrated circuit includes a plurality of voltage regulators. A given voltage regulator of the plurality of voltage regulators includes a differential amplifier and an output transistor. The differential amplifier and the output transistor are coupled at a gate node of the output transistor. The voltage regulator provides a regulated output voltage at an output node of the output transistor. The integrated circuit includes a common gate line, which is coupled to the gate node of the output transistor in each of the plurality of voltage regulators. The integrated circuit also includes a common power line, which is coupled to the output node of the output transistor in each of the plurality of voltage regulators. The common power line provides operational power to one or more circuit blocks in the integrated circuit.