173 results about "Pull-up resistor" patented technology

The invention discloses a zero-voltage turn-on circuit and a zero-voltage turn-on method of a switching tube in a switching power supply, and belongs to the technical field of circuits. In a critical conduction mode, when a low-side power tube is turned off, the rising edge zero-voltage starting circuit compares a switch node voltage with an input voltage or compares the switch node voltage with an output voltage under the control of a low-side gate driving voltage, outputs a high level to a high-side gate driving end when the switch node voltage is equal to the input voltage or the output voltage, and outputs a low level to a low-side gate driving end when the high level is equal to the output voltage. A high-side power tube is controlled through a high level to realize zero-voltage starting; in a critical conduction mode, when the high-side power tube is turned off, the falling-edge zero-voltage starting circuit compares an induced voltage with a pull-up resistor voltage under the control of a high-side gate driving voltage, outputs a high level to a low-side gate driving end when the induced voltage is equal to the pull-up resistor voltage, and controls the low-side power tube to realize zero-voltage starting through the high level. The induced voltage is equal to the sum of the pull-up resistor voltage and the switch node voltage. According to the invention, the transmission delay can be reduced.

An integrated circuit is provided for driving the gate of a GaN power switch transistor in a switching power converter. During a first portion of an on-time period for the GaN power switch transistor, the integrated circuit charges the gate through a relatively high pull-up resistance. During a second portion of the on-time period, the integrated circuit charges the gate through a relatively low pull-up resistance. During a first portion of an off-time period for the GaN power switch transistor, the integrated circuit discharges the gate through a relatively low pull-down resistance and then discharges the gate through a relatively high pull-down resistance in response a voltage of the gate falling below a threshold voltage.

The embodiment of the invention provides a single-bus communication method and device, a chip and a medium, and the method comprises the steps: enabling a host to enter an initialization mode after the host confirms that an internal power supply and a clock of a slave are stable; the host sends a wake-up code to the slave within a set time to wake up the slave, and releases the bus to enter a normal communication mode; the host sends a communication signal to the slave through the improved communication frame; after the host receives a response signal of the slave, the host releases the bus, the bus is pulled to a high level from an external pull-up resistor, and the transmission is ended; wherein the format of the improved communication frame comprises ten codes, one code corresponds to one bit, and the ten codes sequentially comprise one start bit, six address bits, one read-write control bit, one data bit and one response bit. A wake-up code is set before communication between the host and the slave, so that the slave is prevented from being mistakenly waken up. According to the communication mode, the coding mode is simplified, the chip area is reduced, and the transmission speed of the chip is also improved.

This signal transmission device comprises: a transmission line (2) having a signal line (21) and a reference line (22); and a termination circuit (3). One end of the signal line (21) of the transmission line (2) is electrically connected to a signal output terminal (101) of a transmitter (100) that transmits an electrical signal, and the other end of the signal line (21) of the transmission line (2) is electrically connected to a signal input terminal (201) which is electrically connected to a constant power supply potential node (203) via a pull-up resistor (204) in a receiver (200) that receives the electrical signal from the transmitter (100). The reference line (22) has a first conductor (221) considered to be ground potential, a second conductor (222) that is DC-isolated from the first conductor (221), and a capacitor (22a) that connects the first conductor (221) and the second conductor (222). The termination circuit (3) is electrically connected to the other end of the signal line (21) of the transmission line (2) and applies a constant voltage, which is a voltage below the constant power supply voltage applied to the constant power supply potential node (203) of the receiver (200), to the other end of the signal line (21) of the transmission line (2).

A delay-adjusted digital-unit interface comprises a first node, a second node, a third node, and an amplifier assembly. The first node is connected to a pull-up resistor and can be connected to the signal line of a transmission line connected to a first digital unit at a distal point. The second node is configured to be connected to a second reference electrical potential, a signal-return line of the transmission line, and a signal-return line of a second digital unit. The third node can be connected to a signal line of the second digital unit. The amplifier assembly is configured to be connected between the first node and the third node, to transform between high electrical potentials on the first node and lower electrical potentials on the third node, and to diversely delay low-to-high and high-to-low signal transitions transmitted by the second digital unit during communication with the first digital unit.

The embodiment of the present application provides a detection circuit and method, the detection circuit comprises: a first MOS transistor, a voltage division unit and a pull-up resistor; the first end of the voltage division unit is connected with the positive pole of a 2PIN battery, the second end of the voltage division unit is connected with the gate of the first MOS transistor, the third end of the voltage division unit is connected with the source of the first MOS transistor, and the third end of the voltage division unit is grounded; the drain of the first MOS transistor is connected with a power supply through the pull-up resistor; the first MOS transistor is used for outputting an indication signal; wherein the indication signal is a signal used for indicating whether the 2PIN battery is connected with a target device; when the 2PIN battery is connected with the target device, the 2PIN battery is used for supplying power for the target device. The detection circuit provided by the embodiment can overcome the problems of the existing detection technology, such as complicated steps, high cost and high current consumption.

A device for transmitting first data to an external device and receiving second data from the external device is provided. The device includes: a voltage mode driver connected to a first node, the voltage mode driver including a pull-up resistor circuit and a pull-down resistor circuit, the pull-up resistor circuit including a plurality of pull-up resistors, and the pull-down resistor circuit including a plurality of pull-down resistors; a current source circuit connected to a second node and including a first current source and a second current source; a pre-driver configured to control the voltage mode driver and the current source circuit, based on the first data; a receiver connected to the second node and configured to obtain the second data based on a voltage level of the second node; and a hybrid resistor connected between the first node and the second node.

Embodiments of the present disclosure disclose an electronic device supporting Type-C connection, comprising: a dual role port (DRP); and a controller coupled to the DRP and performing: detecting whether the DRP is connected to a peer device; in response to detecting that the DRP is connected to the peer device, detecting whether the DRP is connected to a pull-up resistor on the peer device; in response to detecting that the DRP is connected to the pull-up resistor on the peer device, confirming whether the electronic device has power supply capability; and after confirming that the electronic device has the power supply capability, inquiring whether the peer device supports becoming a sink role.

This invention discloses an interface power supply circuit and a terminal. The circuit includes: a VBUS power network for a USB connector, a PMOS transistor VT2, an NMOS transistor Q3, an NMOS transistor Q1, and an NMOS transistor Q2. The VBUS power network is connected to the source of the PMOS transistor VT2. The control terminal of the PMOS transistor VT2 is connected to the drain of both the NMOS transistor Q3 and the NMOS transistor Q1. A resistor R1 is connected in parallel between the source and drain of the PMOS transistor VT2. The drain of the PMOS transistor VT2 is connected to the terminal's system power supply VDD_5V to supply power to the terminal's VCC_IN power supply. The drain of the NMOS transistor Q1 is connected to the VBUS power network via a pull-up resistor R1. The control terminal of the NMOS transistor Q1 is connected to the drain of the NMOS transistor Q2. The source of the NMOS transistor Q1 is connected to the GND ground terminal. This provides a more stable interface power supply solution, improving the operational stability of the terminal and enhancing the user experience.

The invention provides an OCP network card resource allocation method and electronic equipment. The method comprises the steps that a first CPLD recognizes the connection state between an OCP network card and a CPU and sends the recognized connection state between the OCP network card and the CPU to a BMC, and the BMC further controls the OCP network card to allocate corresponding bandwidth resources for each CPU based on the connection state between the OCP network card and the CPU. Thus, the BMC can automatically control the OCP network card to allocate corresponding bandwidth resources to each CPU through the connection state between the OCP network card and the CPU identified by the CPLD, welding of electrical elements such as a pull-up resistor and a pull-down resistor on a mainboard is not needed, and then the level value of the BIF pin is not needed to be configured by manually adjusting the pull-up resistor or the pull-down resistor. Therefore, automatic and accurate allocation of OCP network card bandwidth resources can be realized, and the automatic and intelligent management level of the electronic equipment is improved. The production complexity and the risk of human errors caused by manual hardware configuration can be avoided, and the manufacturing, operation and maintenance cost is reduced.

The purpose of the present invention is to suppress the occurrence of malfunctions and malfunctions in an encoder via a communication line when the encoder is detached from and attached to a control device. A control device (2) controls a motor (4) on the basis of a detection signal from an encoder (3) that detects the operating position of the motor (4). A control device (2) is provided with a communication unit (22), a pull-up resistor (R1), a first power source (26), a first switch (SW1), and a control unit (27). The communication unit (22) transmits and receives the detection signal to and from the encoder (3) via the communication line (L2). The pull-up resistor (R1) is connected to the communication line (L2). A first switch (SW1) is provided in a first circuit (L7) that connects a first power source (26) and a pull-up resistor (R1), and turns on and off the first circuit (L7). The control unit (27) controls the first switch (SW1).

A kind of control loop pulse width adjustable timer locking circuit and method, the circuit includes working power supply, first, second 555 timer chip U1, U2, three input or gate chip U3 and button switch S1;The power supply pin of working power supply VCC is connected to two 555 timers and three input or gate chip, the 2 number trigger pin of U1, U2 is connected;The 3 number output pin of U1, U2 and the pin of button switch S1 are respectively connected to the input end of U3, the output end of U3 is connected to the 2 number trigger pin of U1, U2, and is connected to VCC with a pull-up resistor R1, the other end of S1 is grounded;And the pulse width of U1 is less than U2.The control loop pulse width adjustable timer locking circuit and method of the present application can accurately modulate the test jump pulse width of control loop, and can only trigger once within a certain time, to avoid multiple triggers leading to undesirable consequences, effectively guarantee the stability of load control system.

A phase-locked loop circuit includes a phase-frequency detector circuit, a time amplifier circuit, a control circuit, and a variable oscillator circuit, such as a voltage-controlled oscillator. The phase-frequency detector is configured to generate a phase error output indicating a phase difference between a reference signal and a feedback signal generated using an output signal. The time amplifier is configured to extend the phase difference to generate an extended phase error output. The variable oscillator is configured to use one or more control signals generated by the control circuit using the extended phase error to adjust a frequency of the output signal. The control circuit may generate a proportional control signal using a switched-resistor circuit that includes a pull-up resistor and a pull-down resistor. The control circuit may generate an integral control signal using a capacitive-shared-integration circuit that includes passive integrating components.

A data line and a charging device are provided. The data line includes a Type-A interface, a first interface, a wire, and a circuit identification module. The Type-A interface is correspondingly connected to a VBUS pin, a D+ pin, a D− pin, and a GND pin in the first interface. The circuit identification module includes a pull-up resistor, a switch circuit, a filter circuit, and a comparator circuit. The comparator circuit controls the first end and the second end or the third end of the switch circuit to be connected.

Embodiments of the present application provide a method and device for determining a driving resistance, a testing machine and a storage medium. The method is applied to the testing machine and includes: obtaining a first output voltage value of a first driving circuit in the memory when the driving resistance is turned on while outputting data from an output pin of the memory; the first driving circuit includes a pull-up resistor and a pull-down resistor, and the driving resistance includes the pull-up resistor or the pull-down resistor; obtaining a test resistance value of a test circuit of the testing machine, a power voltage value of the first driving circuit, and a first voltage value applied to the test circuit when the driving resistance is turned on; the test resistance of the test circuit and the driving resistance of the first driving circuit form a series circuit when the driving resistance is turned on; and determining the resistance value of the driving resistance according to a voltage division law of the series circuit based on the first output voltage value, the test resistance value of the test circuit, the first voltage value and the power voltage value.

A system and method for operating an output driver are disclosed, the method comprising connecting a first P-channel field-effect transistor (PFET) between a supply voltage and an output node; connecting a second PFET in parallel with the first PFET between the supply voltage and the output node; connecting a first N-channel field-effect transistor (NFET) between the supply voltage and a gate of the second PFET; and adjusting a voltage at a gate of the first NFET based on a voltage at the output node to modulate a voltage of a gate of the second PFET to maintain a pull-up resistance within a predefined range.

Methods, devices, or systems can be used to detect wire breaks in battery modules, such as those found in electric vehicles. These methods, devices, or systems may involve comparing voltage measurements from even and odd-numbered battery cells with pull-up resistors enabled and disabled. By using simultaneous measurements and determining comparisons between adjacent cells, the method can compensate for load fluctuations that might lead to false detections. The approach can be executed within a fault-tolerant time interval, allowing for the timely implementation of safety measures when a fault is detected.

An integrated circuit is provided to drive the gate of a GaN power switching transistor in a switching power converter. During the first part of the on-time period for the GaN power switching transistor, the integrated circuit charges the gate through a relatively high pull-up resistor. During the second part of the on-time period, the integrated circuit charges the gate through a relatively low pull-up resistor. During the first part of the off-time period for the GaN power switching transistor, the integrated circuit discharges the gate through a relatively low pull-down resistor and then discharges the gate through a relatively high pull-down resistor in response to the gate voltage falling below a threshold voltage.

The application provides a solid rocket engine ignition circuit capable of preventing the control system control output end from being reset transiently and mis-triggered. The control end reset transient high level is prevented from being mis-triggered, and a simple logic module and a pull-up resistor are adopted to prevent the control system control output end from being reset transiently and mis-triggered. The pull-up resistor connected to the output end of the control module makes the control signal output by the control module in a high state during the reset period. The logic module is inverted to a low level signal, so that the high level signal output by the control module during the power-on reset period can be effectively prevented from directly causing the ignition module to be mis-triggered.

Various configurations of high-speed data communication devices, e.g., repeaters, interfacing between a host and a peripheral, and methods of operating the same, are provided to improve the Remote Wake sequence. Repeaters include circuitry to detect the start of Resume signaling or the end of Resume, following initiation of Remote Wake. In an example, pull-up resistors coupled to upstream differential signal lines and a detection circuit with a current source are controlled to detect the start of Resume signaling. In another example, the upstream-side pull-resistors and an enable signal to an upstream-side transmitter are controlled to detect the end of Resume.

The utility model relates to the technical field of low-power-consumption circuits, in particular to a low-power-consumption remote controller circuit for a frequency converter, which comprises a power input circuit, a pull-up resistor R1, a pull-down resistor R21, a first boost low-power-consumption power converter and a second boost low-power-consumption power converter. The first boost type low-power-consumption power converter and the second boost type low-power-consumption power converter are connected to the power input circuit. The second boost type low-power-consumption power converter is connected with the power input circuit through a pull-up resistor R1, and the first boost type low-power-consumption power converter is grounded through a pull-down resistor R21. According to the utility model, the main control unit can control the closing of the first boost type low-power-consumption power converter through the enable signal, so that the dynamic management of the power consumption of the module supplied by the first boost type low-power-consumption power converter is realized, and the power consumption is reduced.

This invention proposes a key detection circuit and a key detection method. The circuit includes: a first key detection module, comprising m pull-up / pull-down branches and one pull-down branch, with the m pull-up / pull-down branches connected in parallel. Each pull-up / pull-down branch has an input / output interface, and the input / output interface is connected to the pull-down button in the pull-down branch via a series-connected first diode; and a second key detection module, comprising N key detection units, each key detection unit being connected to one of the q input / output interfaces in the first key detection module via q input / output terminals, with each key detection unit having a different connection method to the first key detection module. This key detection circuit allows for the connection of multiple buttons, diodes, and pull-up resistors with fewer input / output ports, thereby improving the efficiency of input / output port utilization, reducing the resource requirements of the processor's input / output ports, and lowering the overall cost.

The utility model provides a kind of tubular motor mechanical resistance rebound control circuit, including circuit board and motor, and is equipped with main control module, power module, motor drive module on circuit board, motor drive module includes motor interface, and the middle shaft of motor is equipped with bump block, and microswitch matched with bump block is set on circuit board, and the trigger signal of microswitch is output by motor interface, and power module is for motor, main control module and motor drive module power supply, still include resistance detection filter circuit, resistance detection filter circuit includes diode D1 and photoelectric coupler OP1, the positive pole of diode D1 is connected with the trigger signal output by motor interface, and the negative pole of diode D1 is connected with the input end of photoelectric coupler OP1 with RC filter circuit, the collector of the output end of photoelectric coupler OP1 is connected with the output end of power module by pull-up resistor R4, the collector of the output end of photoelectric coupler OP1 is connected with the signal input end of main control module, and the emitter of the output end of photoelectric coupler OP1 is grounded.

A device for transmitting first data to an external device and receiving second data from the external device is provided. The apparatus includes: a voltage mode driver connected to a first node, the voltage mode driver including a pull-up resistor circuit and a pull-down resistor circuit, the pull-up resistor circuit including a plurality of pull-up resistors, and the pull-down resistor circuit including a plurality of pull-down resistors; the current source circuit is connected to the second node and comprises a first current source and a second current source; a pre-driver configured to control the voltage mode driver and the current source circuit based on first data; a receiver connected to the second node and configured to obtain second data based on a voltage level of the second node; and a hybrid resistor connected between the first node and the second node.

The utility model discloses a single line communication circuit and electronic equipment, include: multiplexing interface, switch on module and communication chip, multiplexing interface is used for connecting the port of external device, carries out communication and charges, the port of external device is provided with pull -up resistance, the first end of switch on module connects multiplexing interface, the second end of switch on module connects the first port of communication chip, and the controlled end of switch on module connects the second end of communication chip, communication chip is used for outputting first instruction to switch on module, switch on module is used for when receiving first instruction, and the passage between multiplexing interface and the first port of communication chip is closed, and the first port is provided with push -pull output circuit, the utility model discloses utilize the initial voltage of pull -up resistance access, provide high level for external device and communication chip, and external device or communication chip is convenient through the mode of pulling low high level, realizes data transmission, solves the single line communication problem under the situation of not equal communication level.

The utility model relates to a gravity sensing device circuit and a display control module based on a small radar, and the gravity sensing device circuit comprises a ball switch K1, one end of which is connected with a pull-up resistor R1 and a resistor R2, and the other end of which is grounded GND; one end of the pull-up resistor R1 is connected with a power supply end 3V3, and the other end of the pull-up resistor R1 is connected with a capacitor C1 and a ball switch K1; and the RC filter circuit comprises a resistor R2 and a capacitor C1. The display control module comprises a gravity sensing device and a display control device, wherein the gravity sensing device is the gravity sensing control circuit; the input end of the interface controller is connected with the signal output end of the gravity sensing device; and the display screen is connected with the output end of the interface controller through a data bus. According to the display control module, on the basis of ensuring normal display of a miniaturized radar, display content and direction switching is carried out according to the state of the miniaturized radar, and the structure is simple and reliable.

The invention provides a circuit for detecting the buckling reliability of a board-to-board connector and electronic equipment, the circuit is applied to a first device and at least two second devices which are connected through the board-to-board connector, and the board-to-board connector comprises a first pin arranged on the first device and a second pin arranged on the second device. One first pin and one corresponding second pin are connected to form a detection pin group, and each board-to-board connector is provided with at least one detection pin group; the circuit comprises a power supply, a pull-up resistor, a pull-down resistor, an analog-to-digital converter (ADC), a grounding point and a plurality of detection pin groups, one end of the pull-up resistor is connected with a power supply, the other end of the pull-up resistor is connected with the pull-down resistor, the pull-down resistor is connected with a grounding point, and the ADC sampling port is connected between the pull-up resistor and the pull-down resistor. The invention provides a circuit for detecting the buckling reliability of a board-to-board connector and electronic equipment, and the circuit and the electronic equipment can achieve the effective detection of the buckling of a plurality of BTB connectors.

The utility model relates to a collector module of a single-wire pulse counting type communication temperature sensor, which comprises an MCU (Microprogrammed Control Unit) with an interruption function and a single-wire pulse counting type communication temperature sensor, a pin 1 of the single-wire pulse counting type communication temperature sensor is connected to a pin 26 of the MCU through a pull-up resistor, and a pin 2 of the single-wire pulse counting type communication temperature sensor is connected to a pin 26 of the MCU through a pull-up resistor. Meanwhile, a pin 1 of the single-wire pulse counting type communication temperature sensor is also connected to a pin 25 of the MCU; the collector module further comprises a power supply interface, a serial port communication interface and a downloading interface, and pins 4 and 5 of the power supply interface, the serial port communication interface and the downloading interface are program downloading interfaces. According to the collector module of the single-wire pulse counting type communication temperature sensor, the power-down reset operation of the single-wire pulse counting type communication temperature sensor can be omitted in the application process of the single-wire pulse counting type communication temperature sensor, and meanwhile it is guaranteed that the number of pulses sent by the sensor can be accurately and efficiently obtained at any time; therefore, the working state of the sensor when the sensor is electrified for a long time is evaluated.

Methods, apparatus, systems, and articles of manufacture are described to determine electrical properties of external components. An example system includes a controller to output an indication to a first input / output pin based on a comparison of a temperature to a threshold; a first pull-up resistor having a first terminal coupled to the first input / output pin and a second terminal coupled to a voltage supply; and a resistor decoder to output a voltage having a voltage based on a resistance of the first pull-up resistor, wherein the controller is to determine the threshold based on the voltage.

The utility model relates to a three-mode magnetic axis keyboard system, which comprises a plurality of keys and an MCU (Microprogrammed Control Unit) module, the keys are arranged in m rows and n columns, m is greater than or equal to 1, n is greater than or equal to 1, each key comprises a chip, and each chip at least comprises a chip enabling pin, a chip mode control pin, a chip magnetic signal induction output pin and a chip signal interruption pin; wherein the chip enabling pins of the chips in the same column are connected to one enabling end of the MCU module together; the chip magnetic signal induction output pins of the chips in the same row are connected together to form an output end, and each output end is connected to a sampling end of the MCU module; the chip mode control pins of all the chips are connected to the control end of the MCU module; and chip signal interruption pins of all chips are connected to an interruption signal end of the MCU module together, and are connected to a power supply through a pull-up resistor. The utility model can meet the requirement of low power consumption.