Abstract: This specification discloses service processing methods, apparatuses, and storage media. In an implementation, a method comprises obtaining a data processing request from a client device deployed at an application layer in a terminal device, transmitting service data comprised in the data processing request to a system layer of the terminal device to determine, in the system layer, system data that match the service data, inputting the service data and the system data into a data processing model for performing data processing on the service data and the system data to obtain a data processing result, wherein the data processing model is pre-deployed in the system layer in the terminal device, and performing, by the client device, service processing based on data processing result obtained from the system layer.

Abstract: This specification discloses methods, apparatuses, and storage media for an offline identity verification. In an example, identity information to be verified of a user that is collected by a terminal device in an offline state is obtained. The identity information to be verified is signed to obtain signed identity information to be verified. The signed identity information to be verified is sent to a secure environment. Signature verification is performed on the signed identity information to be verified in the secure environment. The identity information to be verified is compared with standard identity information stored in the secure environment after signature verification on the signed identity information to be verified is passed, to obtain a first comparison result. Offline identity verification is performed on the user according to the first comparison result.

Abstract: A client application in a rich execution environment sends a registration instruction of a secure memory to a trusted application in a trusted execution environment, where the registration instruction carries a memory address. Based on the registration instruction, a trusted application calls a registration interface of an operating system in a trusted execution environment, and sends a registration request of the secure memory to a processor trusted framework unit, so that the processor trusted framework unit updates, based on the registration request, an attribute of memory space corresponding to the memory address to a secure attribute.

Abstract: The present disclosure provides methods, apparatuses and systems for key management and service processing. In one aspect, a method includes receiving, by a authentication server from a trusted execution environment (TEE) of a terminal device, device authentication information through a secure channel between the TEE and the authentication server. The device authentication information is configured to prove an identity of the terminal device. The method includes performing, by the authentication server based on the device authentication information, device authentication on the terminal device. The method further includes in response to determining that the terminal device passes the device authentication, sending, by the authentication server, a service encryption key and a device identity certificate to the TEE through the secure channel.

Abstract: A capacitively coupled chopper instrumentation amplifier includes: an input chopper unit, configured to chop a differential input signal based on a clock signal to generate a chopped differential input signal; an output chopper unit, configured to chop a differential output signal based on the clock signal to generate a chopped differential output signal; a capacitor feedback network, configured to convert a differential difference of the chopped differential output signal and the chopped differential input signal to generate a differential feedback signal by a switching capacitor division voltage method with the input chopper unit and the output chopper unit; and a fully differential amplifier, which is configured to amplify the differential feedback signal to generate a differential output signal; wherein, in an initial period after the input chopper unit receives a differential input signal, the capacitively coupled chopper instrumentation amplifier prevents an output saturation by reducing a gain.

Abstract: A linear power converter circuit comprising: an output transistor, wherein a gate of the output transistor is controlled by an error amplification signal for converting an input voltage into an output voltage; an error amplification circuit configured to amplify a difference between a reference voltage and a feedback voltage to generate the error amplification signal, thereby regulating the output voltage to a predetermined level, wherein the feedback voltage is related to the output voltage; and a first surge protection circuit configured to clamp the gate-source voltage of the output transistor when the slew rate of the input voltage exceeds a threshold, thereby limiting the current through the output transistor to not exceed a predetermined upper limit.

Abstract: A bandgap reference circuit includes: plural bipolar transistors; plural resistors; plural switches; and a feedback control circuit which includes an amplifier and a subset of the plurality of resistors. The bipolar transistors, the resistors and the feedback control circuit generate a positive temperature coefficient signal and a negative temperature coefficient signal, and generate a bandgap reference voltage according to a linear superposition of the positive temperature coefficient signal and the negative temperature coefficient signal. The bandgap reference circuit has plural variance parameters which influence a temperature coefficient and/or an offset voltage of the bandgap reference voltage.

Abstract: A high side voltage boost control circuit of a high voltage battery control system comprises: a linear regulator circuit powered by a first high voltage power rail to generate a high side reference ground potential; a boost circuit powered by a first low voltage power rail, converting it into a second high voltage power rail according to a boost enable signal and regulating a boosted voltage to a predetermined target voltage; a feedback signal generation circuit powered by the first low voltage power rail to generate a feedback voltage according to the boosted voltage; and a comparison circuit comparing the feedback voltage with a reference voltage to generate the boost enable signal. The battery voltage is higher than a withstand voltage of at least one device in the boost, feedback, and comparison circuits.

Abstract: A battery management system includes a MOSFET unit and a control circuit. The MOSFET unit includes a charging MOSFET and a discharging MOSFET, wherein the MOSFET unit is coupled to a positive side power path to control charging and discharging a battery. In a process of turning OFF discharging MOSFET, the control circuit is configured to operably electrically connect a gate-source capacitor of the discharge MOSFET to a discharge level for discharging the gate-source capacitor, and determine to stop discharging the gate-source capacitor according to a difference of a pack pin voltage and a discharge pin voltage, wherein the discharge level is lower than the pack pin voltage.

Abstract: A regulator circuit for generating a high voltage side reference potential comprises: a high voltage side differential input stage for generating a differential current pair according to a difference between a positive terminal input voltage and a negative terminal input voltage; a low voltage side gain stage with transresistance to convert the differential current pair into a transresistance output voltage; and an output amplification stage circuit to amplify the transresistance output to generate an output voltage. The high voltage side differential input stage and the output amplification stage circuit are powered by a high and a low voltage power rails respectively. The regulator circuit regulates the output voltage to a predetermined target voltage higher than a withstand voltage of at least one device in the low voltage side gain stage circuit, according to a difference between a feedback voltage related to the output voltage and a reference voltage.

Abstract: This specification discloses model running methods, apparatuses, computer-readable storage media and systems. In an example method, an original model is split to obtain a basic model and a trusted execution environment (TEE) model; and data of the basic model and data of the TEE model are delivered to a terminal device, so that a rich execution environment (REE) in the terminal device runs the data of the basic model, and a TEE in the terminal device runs the data of the TEE model.

Abstract: A multiplexing channel switch selection circuit includes: plural channel switch circuits coupled to plural corresponding input ends and plural channel switch circuits are commonly coupled to an output end. Each channel switch circuit comprises: a switch unit and a control circuit. The control circuit includes: an analog bootstrap circuit coupled between the shared source end and the shared gate end, wherein in a situation when the channel selection signal selects the each channel switch circuit, the analog bootstrap circuit supplies an conductive bias voltage across between the shared source end and the shared gate end, to turn ON the first switch and the second switch; and a feedback regulation circuit coupled to the analog bootstrap circuit, wherein the feedback regulation circuit feedback-regulates the shared gate voltage at a constant voltage level.

Abstract: A dual-loop LDO includes: an output power switch, an outer and inner loop circuit. An output end has a first pole, a control end has a second pole, whereas, an outer loop capacitor of an outer feedback circuit has a third pole. During a case when a load current switches its level, the inner loop circuit adaptively executes swift response, thus shortening a transient response time prior to a time point where output voltage reaches target voltage level. A third pole frequency of the third pole is lower than a first pole frequency of the first pole and a second pole frequency of the second pole to an extent where the dual-loop low dropout regulator approximates a stable state during a normal operation mode and a phase margin of the dual-loop LDO is greater than a preset angle and a bandwidth of the LDO is greater than a preset frequency.

Abstract: In one embodiment, there is provided a DC output solid contactor assembly having a housing enclosure and a cavity within the enclosure; one or more SOT-227 isolated semiconductor modules and its variants in a stand-alone, parallel or series configuration; a novel drive circuit board mounted on at least one of the modules with input power terminals for coupling to an input control source; and gate impulse output terminals coupling to one or more semiconductor's gate electrodes. The drive circuit includes a voltage priming system that converts input control signal to an isolated and optimal gate driving voltage level; and positive and negative output power terminals for coupling to the electrical load side.

Abstract: This specification discloses model running methods, apparatuses, computer-readable storage media and systems. In an example method, an original model is split to obtain a basic model and a trusted execution environment (TEE) model; and data of the basic model and data of the TEE model are delivered to a terminal device, so that a rich execution environment (REE) in the terminal device runs the data of the basic model, and a TEE in the terminal device runs the data of the TEE model.

Abstract: Embodiments of this application provide methods and apparatuses for offline payment authorization. In an implementation, a method comprising: obtaining wallet account information, a current account balance, and current credit information of a target electronic wallet account in response to determining that a current state of the target electronic wallet account satisfies a predetermined certificate delivery condition, determining an offline payment limit based on the current account balance and the current credit information, signing summary information by using a private key of a server to obtain an electronic wallet signature, generating a user certificate based on the summary information and the electronic wallet signature, and sending the user certificate to a terminal device associated with the target electronic wallet account for an offline account corresponding to the target electronic wallet account to make offline payment within the offline payment limit based on the user certificate.

Abstract: Example methods, apparatuses, and computer-readable media for offline transaction processing are disclosed.

Abstract: A resource transfer method includes obtaining, by using a target application, a resource transfer request triggered by a target user, where the resource transfer request includes verification information used to perform resource transfer processing and identity feature information of the target user. By using the target application, verifying the verification information, and invoking, if the verification succeeds by using the target application, a local device management rule, and determining, by using the local device management rule, whether the identity feature information of the target user matches identity feature information of a pre-registered user. If the identity feature information of the target user matches the identity feature information of the pre-registered user, sending the resource transfer request to a first server corresponding to the target application to trigger, based on the resource transfer request, the first server to perform resource transfer processing.

Abstract: Embodiments of this specification provide account opening methods, systems, and apparatuses. An example method is performed by a terminal device that includes a trusted execution environment (TEE) and an encryption hardware-based secure element. When it is detected that a current user initiates an account opening request, the terminal device obtains a user public key of the current user in the TEE, and signs a user public key by using a predetermined manufacturer private key, to obtain a user certificate; signs, in the secure element by using a user private key corresponding to the user public key, opening information; generates an opening request in the TEE based on at least the user certificate and signed opening information; and, in the TEE, generates an opening request packet based on the opening request, and sends the opening request packet to a server that opens an account based on the opening request packet.

Abstract: Embodiments of this specification provide a payment service implementation method and apparatus. According to the method in the embodiments, when a payment service is performed, anonymous processing needs to be performed on original payment account information. First, a random number is used to perform transform processing on the original payment account information, so that information encrypted each time by using a public key is different. Then, the public key and an encryption algorithm obtained in advance are used to encrypt payment account information obtained after the transform processing, so as to obtain anonymous payment account information, thereby completing an anonymous processing process. After anonymous processing is completed, the obtained anonymous payment account information may be used to perform a payment operation.