14 results about "Pull in voltage" patented technology

The application discloses a small terahertz MEMS single-pole four-throw switch based on a shared composite beam and belongs to the technical field of radio frequency MEMS. The single-pole four-throw switch based on the whole beam is composed of a microstrip main feeder, a bifurcated transition structure, a low-loss switch structure and a microstrip output line. The MEMS switch is formed into a high-isolation symmetric structure by a metal-dielectric whole composite beam, and the switch has a minimum size and a low pull-down voltage by combining a crane-shaped arm and a shared folding arm. The corresponding part of the beam is pulled down by electrostatic force generated by the potential difference between the bottom electrode and the shared beam metal part, and the metal contact on the beam makes the corresponding microstrip output line conductive. When one of the MEMS switch lines is turned on and the other lines are turned off, the signal transmission is completed. The reconfigurable switch is formed by four asymmetric single-pole single-throw switch units through symmetric and compact arrangement, has high isolation in an ultra-wide frequency band, has a channel reflection coefficient less than -15 dB in a DC-350 GHz frequency band, has an in-band insertion loss less than 1.8 dB, and has an isolation greater than 15 dB.

A voltage generating circuit includes: an analog voltage generating circuit having a first amplifier therein, which is configured to generate an output voltage in response to a first reference voltage and a feedback voltage, and first and second digital driving circuits. The first digital driving circuit is configured to selectively provide a pull-up voltage boost to the output voltage generated by the first amplifier, in response to comparing the feedback voltage to a second reference voltage having a magnitude less than the first reference voltage by a first offset voltage. The second digital driving circuit is configured to selectively provide a pull-down voltage boost to the output voltage generated by the first amplifier, in response to comparing the feedback voltage to a third reference voltage having a magnitude greater than the first reference voltage by a second offset voltage.

The invention relates to a door lock (1) for locking a door (3) of a motor vehicle (2), comprising a diagnosable switch (4) comprising a parallel resistor (6), a switch (7) configured to determine the position of the door (3), and a series resistor (8), the parallel resistor (6) being connected in parallel with the switch (7) and connected in series with the series resistor (8), and a diagnostic circuit (5) for detecting the position of the door (3), comprising a series resistor (8), a pull-up resistor (11) configured to receive a pull-up voltage from a power source (16), a voltage divider (12) comprising a midpoint (13), and a microcontroller (14), where the diode (10) is connected between the series resistor (8) and the voltage divider (12), the midpoint (13) is connected to the microcontroller (14), the diode (10) is connected to the pull-up resistor (11) towards an anode of the voltage divider (12), and the diode (10) is connected to the microcontroller (14) towards a cathode of the voltage divider (12). And the microcontroller (14) is configured to determine whether the midpoint voltage of the midpoint (13) is related to the switching position of the switch (7).

The invention discloses a transmitter and a ringing suppression circuit and method. The transmitter includes a positive differential terminal and a negative differential terminal. The ringing suppression circuit comprises a bias current module used for generating bias current; the pull-down module is used for generating pull-down voltage corresponding to common-mode voltage according to the bias current; the pull-up module is used for generating pull-up voltage corresponding to common-mode voltage according to the bias current, and when the transmitter jumps from the dominant state to the implicit state, the ringing suppression circuit clamps the positive differential terminal and the negative differential terminal to the common-mode voltage. The ringing suppression circuit generates a driving current for ringing suppression according to a bias current to improve a current driving capability, and dynamically enables a ringing suppression function according to a signal state change to reduce static power consumption.

An inverter (500), logic circuit, word line circuit, memory and integrated system, wherein the inverter (500) mainly comprises an inverting circuit (501) and an adjusting circuit (502-1). The inverting circuit (501) is used for inverting an input signal, and the adjusting circuit (502-1) is used for providing a smaller pull-up voltage for the inverting circuit (501) in standby mode and a larger pull-up voltage for the inverting circuit (501) in working mode according to a control signal. The adjusting circuit (502-1) provides the smaller pull-up voltage in standby mode, thereby reducing the leakage current of the inverter (500) in standby mode, and also reducing the influence on the working performance of the inverting circuit (501) in working mode of the inverter (500), so that the inverter (500) can work normally.

Embodiments of the present application provide a resistance measurement circuit, a resistance measurement method, an electronic device and a resistance measurement device. The resistance measurement method is applied to the resistance measurement circuit, and the resistance measurement method comprises: acquiring a pull-up voltage output by a voltage generator to a voltage division detection circuit; determining a reference array resistance value of a reference resistance array based on an adjustable resistance range of the reference resistance array, and controlling the opening and closing states of all switches to make the current resistance value of the reference resistance array reach the reference array resistance value; acquiring a node voltage corresponding to a connection node between the reference resistance array and a to-be-measured resistance; and determining a target resistance value of the to-be-measured resistance based on the pull-up voltage, the node voltage and the reference array resistance value of the reference resistance array. The method controls the low-cost resistance measurement circuit to achieve efficient and accurate resistance value measurement of the to-be-measured resistance.

The utility model relates to the technical field of circuits, in particular to a constant-current electromagnetic coil driving circuit structure, which is characterized by comprising an input control signal, a first circuit module, a second circuit module, a third circuit module and a pull-up voltage source which are connected in sequence, the second circuit module comprises a PWM comparator, a first hysteresis resistor, a hysteresis reference voltage source, a hysteresis comparator, a current-limiting resistor and an N-MOS which are connected in sequence, the PWM comparator is connected with the first circuit module, the N-MOS and the third circuit module form a constant current circuit through the PWM comparator and the hysteresis comparator, and the PWM comparator is connected with the first hysteresis resistor. A hardware constant-current circuit is formed by a comparator, the defect that the suction force of a PWM driving electromagnetic coil is reduced along with the increase of the temperature is overcome, and continuous and stable electromagnetic suction force is ensured.

Disclosed is a delay timer, the delay timer of the embodiment of the application has a series structure of a current source and a capacitor, and a control circuit changes the topological relation of the capacitor in the circuit according to the state (high level or low level) of an input signal, so that the charging and discharging of the capacitor voltage can be counted after the input signal jumps, and at the same time, the ground end of an inverting circuit used as a buffer circuit is connected to one end of the capacitor instead of a reference ground, so that the pull-up voltage (power supply voltage) can be introduced to affect the delay time of the delay timer, thereby reducing the negative influence of the fluctuation of the threshold voltage inherent in the inverting circuit on the accuracy of the delay time of the delay timer. The circuit structure of the delay timer of the embodiment of the application is simple, the number of components is small, and the delay precision is high.

A semiconductor device includes a pull-up source voltage generation circuit configured to drive a pull-up voltage to a normal voltage during a normal period and to drive the pull-source voltage to a test voltage during a test period. The semiconductor device also includes a pull-down source voltage generation circuit configured to drive a pull-down voltage to a ground voltage during the normal period and to drive the pull-down source voltage to a bit line pre-charge voltage during the test period. The semiconductor device further includes an equalization control signal driver configured to receive the pull-up source voltage and the pull-down source voltage to drive an equalization control signal for equalizing voltage levels of an internal bit line pair of a bit line sense amplifier.

The application discloses a self-adaptive pre-pull-down circuit and method applied to a synchronous rectification driving chip, samples a gate voltage VG of a synchronous rectification tube and obtains a pre-pulled comparison threshold voltage VFB by voltage reduction; samples a drain-source voltage VD of the synchronous rectification tube and compares the voltage VD with the voltage VFB, if the voltage VD is less than the voltage VFB, outputs a control signal to a VG voltage driving unit of the chip, reduces the voltage VG until the VG is pulled down to the ground when a turn-off threshold is reached. Because the voltage VG has been pulled down in advance, the voltage VG cannot be pulled back to a low value, so the voltage VG can be quickly pulled down to the ground. The application adjusts the gate potential of the synchronous rectification tube by adding the pre-pull-down circuit, thereby prolonging the conduction time of the synchronous rectification tube, reducing the conduction time of a body diode and improving the efficiency of the synchronous rectification.

The invention discloses a display panel and a pixel driving circuit and a driving method thereof. The pixel driving circuit is used for driving a pixel unit to emit light and comprises a pulse width modulation module and a pulse amplitude modulation module. The pulse amplitude modulation module comprises a driving transistor which is connected in series with the pixel unit between a working voltage and a ground voltage; the gate of the driving transistor is used for inputting a first data signal; and the first compensation unit is connected with the driving transistor and is used for automatically compensating the threshold drift of the driving transistor. The pulse width modulation module comprises a pull-down transistor, the drain of which is connected to the gate of the driving transistor, the source of which is connected to a pull-down voltage, and the gate of which is used for inputting a second data signal; and the second compensation unit is connected with the pull-down transistor and is used for automatically compensating the threshold drift of the pull-down transistor. According to the display panel and the pixel driving circuit and driving method thereof, the threshold voltage is dynamically compensated, so that the influence caused by threshold drift can be eliminated.

The invention discloses a load-end Type-C interface water vapor detection circuit and detection method. The circuit comprises the steps that a pull-up module drives a detection module to sample a configuration channel of an interface; a pull-up resistor in the pull-up module is connected with the configuration channel through a switch S1, and a pull-down resistor is connected with the configuration channel through a switch S2; the detection module compares the upper threshold voltage Vth with the input voltage Vin and compares the lower threshold voltage Vtl with the input voltage Vin, the delayer Y1 compares the change condition of the input voltage Vin, and the counter outputs the counting result of the number of clocks. Therefore, only one pull-up voltage is introduced, other circuit designs are integrated in the power management chip, the Type-C interface does not need to be subjected to design change, water vapor intrusion can be quantitatively detected by analyzing detection modes such as rise time, a rise and fall curve and partial voltage value change of the input voltage, the upgrading and refitting cost is low, the use of the existing interface is not influenced, and the application range is wide. The application scene is wide.

A shift register unit is provided, comprising a shift register circuit, wherein the shift register circuit comprises a display input circuit, at least two driver output circuits capable of outputting display driver pulses sequentially, each of the driver output circuits being configured to write a signal provided by the driver clock signal input terminal to a driver signal output terminal in response to the control of an active level signal at a pull-up node;wherein the shift register circuit further comprises a first pull-up voltage stabilization circuit and / or a second pull-up voltage stabilization circuit, wherein the first pull-up voltage stabilization circuit is connected to the pull-up node and is configured at least to keep the voltage at the pull-up node unchanged during the time in which the first driver output circuit outputs a display driver pulse, and wherein the second pull-up voltage stabilization circuit is connected to the pull-up node and is configured at least to keep the voltage at the pull-up node unchanged during the time in which the last driver output circuit outputs a display driver pulse.

A semiconductor device includes a pull-up source voltage generation circuit configured to drive a pull-up voltage to a normal voltage during a normal period and to drive the pull-source voltage to a test voltage during a test period. The semiconductor device also includes a pull-down source voltage generation circuit configured to drive a pull-down voltage to a ground voltage during the normal period and to drive the pull-down source voltage to a bit line pre-charge voltage during the test period. The semiconductor device further includes an equalization control signal driver configured to receive the pull-up source voltage and the pull-down source voltage to drive an equalization control signal for equalizing voltage levels of an internal bit line pair of a bit line sense amplifier.