16results about "Network modifications to reduce temperature" patented technology

Apparatuses and methods for calibrating adjustable impedances of a semiconductor device are disclosed in the present application. An example apparatus includes a register configured to store impedance calibration information and further includes programmable termination resistances having a programmable impedance. The example apparatus further includes an impedance calibration circuit configured to perform a calibration operation to determine calibration parameters for setting the programmable impedance of the programmable termination resistances. The impedance calibration circuit is further configured to program the impedance calibration information in the register related to the calibration operation.

The invention discloses a low-temperature filtering module and a quantum computer using the same. The low-temperature filtering module comprises a grounded shell; the filter main body is integrated in the shell, and the filter main body comprises a plurality of coaxially arranged metal cylinders to form an impedance conversion structure; the infrared wave-absorbing structure is integrated in the housing, and the infrared wave-absorbing structure wraps the filter main body. According to the invention, the low-pass filter and the infrared wave-absorbing structure are integrally designed through a coaxial discontinuous metal cylinder structure, and impedance conversion filtering and infrared quasi-particle absorption functions are realized in parallel in an integrated module, so that the high-frequency filtering performance of an original separation device is maintained, the number of devices is reduced through function integration, and the cost is reduced. The material cost and the occupied space of the mK temperature zone are remarkably reduced, the cooling capacity pressure of a refrigerator is relieved, meanwhile, the loss of a cascade connector is eliminated, the consistency of devices is improved, and a key solution is provided for space expansion and reliability optimization of a high-density superconducting bit system.

Apparatuses and methods for calibrating adjustable impedances of a semiconductor device are disclosed in the present application. An example apparatus includes a register configured to store impedance calibration information and further includes programmable termination resistances having a programmable impedance. The example apparatus further includes an impedance calibration circuit configured to perform a calibration operation to determine calibration parameters for setting the programmable impedance of the programmable termination resistances. The impedance calibration circuit is further configured to program the impedance calibration information in the register related to the calibration operation.

The present invention discloses an active phase shifter with temperature compensation, comprising an input transformer balun, a polyphase filter, a vector modulation module based on a Gilbert cell, an output transformer balun, and a positive temperature coefficient current source. The input transformer balun is used to convert a single-ended input signal into a differential signal; the polyphase filter is used to convert the differential signal into a quadrature signal; the vector modulation module based on the Gilbert cell is used to select polarity and perform vector synthesis on the quadrature signal; the output transformer balun is used to convert the differential signal at the output into a single-ended signal; and the positive temperature coefficient current source is used to control the gain of the Gilbert cell. By designing a temperature-dependent positive temperature coefficient current source, the present invention mitigates the temperature-dependent gain change of the vector modulation module, thereby improving the stability of the key performance of the active phase shifter within a temperature range of 55 to 85°C.

The application discloses a temperature compensation attenuator and a design method thereof, relates to an attenuator device, and belongs to the field of radio frequency and microwave, wherein the temperature compensation attenuator comprises a temperature compensation driving module and an attenuation structure. The temperature compensation driving module adjusts the attenuation of the attenuation structure circuit according to a temperature compensation circuit and a differential network control voltage. The attenuation structure circuit is connected between an input port and an output port, and realizes the circuit attenuation compensation function. The temperature compensation attenuator can compensate the gain variation of active devices caused by temperature change in the microwave / radio frequency channel, has a wide working frequency range, and is suitable for a large attenuation compensation range.

The utility model provides an active filtering mechanism, which comprises a shell, a control panel positioned in the shell, a heat dissipation device positioned on one side of the control panel, a plurality of groups of heat dissipation assemblies arranged on one side of the control panel close to the heat dissipation device and IGBT (Insulated Gate Bipolar Translator) modules positioned in the heat dissipation assemblies, and the heat dissipation device comprises a fixed plate fixed in the shell, the heat dissipation assemblies and a wind scooper, the air inlet of the wind scooper is larger than the air outlet of the wind scooper, and the heat dissipation piece is connected to the edge of the air outlet of the wind scooper. According to the active filtering mechanism provided by the utility model, when heat dissipation is carried out through active filtering, the heat dissipation assembly enables air to form airflow which is blown in from the air inlet of the wind scooper and blown out from the air outlet of the wind scooper, so that heat dissipation is carried out on the heat dissipation piece, and the heat dissipation piece carries out heat dissipation on the IGBT module; by means of the structure, the size of the active filtering mechanism can be reduced, and heat dissipation can be well carried out while the size of the active filtering mechanism is reduced.

The utility model discloses a low-temperature filtering module and a quantum computer using the same. The low-temperature filtering module comprises a grounded shell, the filter main body is integrated in the shell, and the filter main body comprises a plurality of coaxially arranged metal cylinders to form an impedance conversion structure; the infrared wave-absorbing structure is integrated in the housing, and the infrared wave-absorbing structure wraps the filter main body. According to the utility model, the low-pass filter and the infrared wave-absorbing structure are integrally designed through a coaxial discontinuous metal cylinder structure, and impedance conversion filtering and infrared quasi-particle absorption functions are realized in parallel in an integrated module, so that the high-frequency filtering performance of an original separation device is maintained, the number of devices is reduced through function integration, and the cost is reduced. The material cost and the occupied space of the mK temperature zone are remarkably reduced, the cooling capacity pressure of a refrigerator is relieved, meanwhile, the loss of a cascade connector is eliminated, the consistency of devices is improved, and a key solution is provided for space expansion and reliability optimization of a high-density superconducting bit system.

The invention discloses a piezoelectric ceramic EMI filter design method considering temperature drift and frequency offset compensation. The method comprises the steps that 1, the nonlinear modulation relation of voltage in a piezoelectric ceramic piece to resonant frequency is measured; 2, fitting a temperature coefficient by combining the actually measured relationship between the temperature change of the piezoelectric ceramic and the resonant frequency deviation; 3, capturing the influence of the temperature change on the resonant frequency behavior of the piezoelectric ceramic tuned filter, and constructing a nonlinear temperature-frequency offset transfer function model in combination with the nonlinear modulation relation and the temperature coefficient; 4, setting specific constraint conditions according to actual electromagnetic interference suppression requirements of the frequency converter; and step 5, sampling response data of the piezoelectric ceramic in real time, and dynamically adjusting the bias voltage based on the temperature-frequency offset transfer function obtained by calculation to perform tuning so as to obtain a filtering result meeting a constraint condition.

The invention discloses a charge pump with temperature compensation and a phase-locked loop, the charge pump comprises a constant current source, a temperature control current source, a proportion module and a control module, the proportion module is used for combining the constant current source and the temperature control current source according to a certain proportion and outputting combined current to a control unit; when the charge pump forwards injects current into the next-stage circuit, the control module injects current formed by combining the constant current source and the temperature control current source according to a certain proportion into the next-stage circuit; and when the charge pump reversely extracts the current from the next stage, the control module extracts the current formed by combining the constant current source and the temperature control current source according to a certain proportion from the next stage of circuit. According to the scheme, the PTAT current and the constant current are combined according to a certain proportion to generate the power supply voltage of the KVCO for compensation, so that temperature compensation is realized, and meanwhile, the problem of excessive compensation is avoided.

An active filter can reduce electromagnetic interference (EMI) generated by the current flowing through the power line. The active filter is connected to the power line at a single node through a coupling capacitor. When the power line current changes, an induced current flows through the coupling capacitor. This induced current is applied to a gain control circuit having cross-coupled PNP transistors, which drives the current to both ends of a variable capacitor. The variable capacitor converts these currents into a voltage, which is injected back into the power line as an injection compensation voltage through the coupling capacitor to compensate for the induced current.

The invention provides a temperature control attenuator and a temperature control attenuation radio frequency switch, and the temperature control attenuator comprises a temperature control bias current circuit which generates bias current with different temperature coefficients according to the change of external temperature; the bias voltage circuit is used for generating grid voltage according to the bias current; and the attenuator comprises an MOS (Metal Oxide Semiconductor) tube, and the MOS tube is used for adjusting the attenuation amount according to the grid voltage. The temperature control bias current circuit automatically responds to external temperature change to generate compensation current, and then the compensation current is converted into proper grid voltage by the bias voltage circuit to control the MOS tube, so that accurate adjustment of attenuation is realized, the influence of temperature change on the characteristics of the MOS tube is effectively overcome, and stable work of the attenuator in different temperature environments is ensured.

The present invention discloses a charge pump and phase-locked loop with temperature compensation. The charge pump includes a constant current source, a temperature-controlled current source, a proportional module, and a control module. The proportional module is used to combine the constant current source and the temperature-controlled current source in a certain ratio and output the combined current to a control unit. When the charge pump injects current into the subsequent circuit in the forward direction, the control module injects a current obtained by combining the constant current source and the temperature-controlled current source in a certain ratio into the subsequent circuit. When the charge pump draws current from the subsequent circuit in the reverse direction, the control module draws a current obtained by combining the constant current source and the temperature-controlled current source in a certain ratio from the subsequent circuit. In this solution, compensation is achieved by combining the PTAT current and the constant current in a certain ratio to generate a KVCO power supply voltage, thereby achieving temperature compensation while avoiding overcompensation.

The present invention provides a frequency selection circuit, a phase-locked loop, a chip, and an electronic device. The frequency selection circuit comprises: a voltage stabilization module, a temperature compensation module, a voltage-controlled oscillation module, a feedback frequency division module, and a frequency selection module; the voltage stabilization module is used for outputting a voltage stabilization signal on the basis of a control signal; the temperature compensation module is used for outputting a compensation voltage signal on the basis of the control signal and a real-time temperature; the voltage-controlled oscillation module is used for outputting a base frequency signal on the basis of the control signal, the voltage stabilization signal, and the compensation voltage signal; the feedback frequency division module is used for performing frequency division on the base frequency signal to obtain a frequency division signal; and the frequency selection module is used for adjusting the control signal on the basis of the frequency division signal and a pre-set frequency reference signal if the frequency division signal and the preset frequency reference signal are outside a preset error range. According to the present invention, a frequency deviation caused by an inductor and a capacitor at different temperatures is compensated by means of a temperature compensation circuit, thereby solving the problem of a certain frequency breakpoint occurring at different temperatures.

The invention discloses a controllable resistor module linearly changing along with current and application of the controllable resistor module. A controllable resistor comprises an operational transconductance amplifier, a PMOS (P-channel Metal Oxide Semiconductor) tube PM1 and a PMOS tube PM2, the controllable resistor module can generate an equivalent resistor in direct proportion to a sampling current, so that the equivalent controllable resistor Rds and the Isense can be linearly correlated, the influence of process errors and temperature is small, the generated error is small, and the controllable resistor module can be applied to current-controlled oscillators, automatic gain control and other scenes needing controllable resistors.

The utility model relates to the technical field of source filters, in particular to an active power filter (APF) heat dissipation structure which comprises an APF body and a heat dissipation assembly, the heat dissipation assembly comprises a cooling shell, a plurality of cooling units, a heat dissipation pipeline, two pump bodies, an upper shell, a lower shell and an air flowing unit, condensate water is stored in the cooling shell, and the air flowing unit is arranged in the cooling shell. Condensed water is pumped into the heat dissipation pipeline to flow through the pump body, then heat dissipation and cooling are conducted on the APF active filter body, the condensed water flows in the heat dissipation pipeline for a circle and then returns to the cooling shell, cooling is completed through the multiple cooling units, heat dissipation is continuously conducted on the APF active filter body, and the cooling efficiency of the APF active filter body is improved. Meanwhile, the upper shell and the lower shell protect the APF active filter body and internal parts, air enters and exits through a plurality of ventilation openings, and the air flowing unit further dissipates heat of the cooling shell and condensate water, so that heat dissipation of the APF active filter body is effectively improved, and cooling can be performed in a short time.

The invention discloses a self-calibration low-frequency compensation circuit system for a resistance-capacitance attenuator and a dynamic calibration method. In order to solve the problem of frequency response distortion caused by parasitic parameters and component tolerance, through cooperative work of the stepping digital potentiometer and the resistance-capacitance attenuator, gain deviation of a transition section from low frequency to high frequency is accurately compensated, and gain fluctuation and waveform distortion are effectively inhibited. According to the invention, the amplitude-frequency flatness and phase consistency in the frequency band from DC to 1MHz are obviously improved, the environment adaptability to temperature, load and parasitic parameter drift is enhanced, and the method is suitable for a high-precision AC voltage and power measurement front end. In order to solve the problem that a traditional fixed compensation element is easily influenced by environment temperature drift and long-term operation aging and the like, the adjustability of the digital potentiometer is utilized, attenuation proportion drift generated by leakage current or environment change can be corrected in real time, and it is ensured that a circuit system can maintain extremely high measurement accuracy under different working conditions.