34 results about "Passive resistance" patented technology

A control system and method for a steer-by-wire system with the passive resistance torque is provided. The control system includes a controller configured to compensate for a passive resistance torque and to generate the required active torque using a three loop control structure: torque feedback loop, rate feedback loop, and steering wheel angle feedback loop. The torque feedback loop is based on an estimated steering torque signal calculated from a steering angle signal, a steering angle rate signal, and a motor current signal.

Memories, current mode sense amplifiers, and methods for operating the same are disclosed, including a current mode sense amplifier including cross-coupled p-channel transistors and a load circuit coupled to the cross-coupled p-channel transistors. The load circuit is configured to provide a resistance to control at least in part the loop gain of the current mode sense amplifier, the load circuit including at least passive resistance.

Physically unclonable function (PUF) memory employing static random access memory (SRAM) bit cells with added passive resistance are disclosed. Added passive resistance can enhance imbalance between transistors in the SRAM bit cell for improved PUF output reproducibility. Enhancing transistor imbalance can more fully skew the SRAM bit cell for increased PUF output reproducibility while still achieving the benefits of output randomness. In one exemplary aspect, added passive resistances in the SRAM bit cell are coupled to a drain of one or more pull-down N-type FETs (NFETs)) in one or more cross-coupled inverters in the SRAM bit cell to enhance imbalance between the inverters. Enhanced imbalance between the inverters increases sensitivity in the output voltage of the SRAM bit cell for a given change in input voltage resulting in greater skew of the SRAM bit cell for increased reproducibility.

The invention discloses a detection method of the passive resistance of an electronic device. According to the detection method, a reasonable tap position of an adjustable resistor is selected according to the theoretical range of testing resistance; collection and measurement are carried out at fixed time points; when resistance in different range intervals is measured, the adjustable resistor is switched to a different tap position; a direct-current alternating measurement method is adopted to further improve the accuracy of the resistance according to the selected tap position; and finally, with two methods mentioned in descriptions of the invention used in combination, the resistance value of the electronic device is calculated through adopting a curve fitting method. With the detection method provided by the technical schemes of the invention adopted, measurement accuracy and precision can be ensured. The detection method has a high engineering application value.

The invention discloses an LCP packaging substrate with a built-in passive resistance-capacitance element and a manufacturing method. The LCP packaging substrate comprises a thin film resistor-capacitor,an LCP substrate base plate, at least one LCP substrate transition sheet, at least two LCP substrate bonding sheets, and an LCP substrate cover plate, wherein theLCP substrate bottom plate, theLCPsubstrate bonding sheet, theLCP substrate transition sheet, thethin film resistor-capacitor, theLCP substrate bonding sheet and theLCP substrate cover plate are laminated and packaged twice in sequence, one LCP substrate bonding sheet is located between two LCP substrates, and electrodes of the thin film resistor-capacitor are led out through surface layer electrode electroplating copper columns.The high-precision and high-stability thin-film resistor and the thin-film capacitor are buried in the LCP packaging substrate in a multi-layer laminated packaging mode, the thin-film resistor-capacitors can be flexibly buried among multiple layers according to the size design, the surface utilization rate of the LCP substrate is greatly increased, and the substrate assembly density is improved.

Design methods for the bearing capacity of prestressed concrete structures. In the existing design methods of statically indeterminate prestressed concrete structures, it is difficult to determine the influence of the confinement structures such as columns, walls, and tubes on the prestressed concrete structure and the influence on the design calculation results. A bearing capacity design method for prestressed concrete structures, which distinguishes concrete structures with infinite side structures and concrete structures with limited side structures, and introduces the lateral limit influence coefficient; calculates the cross-sectional area of ​​longitudinal prestressed tendons in the tension zone; determines by The sum of the bending moment value caused by tensioning the prestressed tendon and the design value of the external load bending moment of the control section; the establishment of the effective prestress from the tension to the prestressed tendon; the design value of the tensile strength of the prestressed tendon is higher than the effective prestress Provide resistance partially passively; calculate the bearing capacity of the normal section of the rectangular prestressed concrete flexure member in the unconfined structure; introduce the influence coefficient of the confinement for correction, and obtain the normal section load capacity of the rectangular prestressed concrete flexure member in the confined structure Force calculation formula. The invention is applied to the bearing capacity design of the prestressed concrete structure.

Disclosed is a semi-passive resistance force control system with active augmentation, which is suitable for a sport equipment with a pulling part. This semi-passive resistance force control system with active augmentation comprises a resistance force module, an energy neutral apparatus, and a control module. The energy neutral apparatus can not only provide an output resistance force to the pulling part when the pulling part is pulled by a user, but also reduce the variation of the output resistance force. The control module is able to accept the sensing data delivered by the internal sensors of the semi-passive resistance force control system with active augmentation to passively compensate the output resistance force and make it fixed. Furthermore, the control module can also provide an active adjustment to the output resistance force based on a preset control mode such that the user can experience a desired resistance force.

A single-phase inverter test circuit for a modular multi-level convertor and a test method therefor. The method comprises: constructing a single-phase test circuit by using two modular multi-level bridge arms; connecting a passive resistance-inductance load; by means of the open-loop passive inversion algorithm and capacitive balancing algorithm, outputting a sine voltage and a sine current; and simulating the normal operation of a modular multi-level convertor, thereby completing the test of the electrical and capacitive balancing algorithms of the modular multi-level convertor. In the test circuit, a direct-current side is supported by a voltage source, so that in the control algorithm, there is no need to control a direct-current voltage, thereby simplifying the controller algorithm of the test. In the test circuit, a direct-current voltage source at the direct-current side is connected to a capacitor in parallel, so that bidirectional currents can flow in a direct-current bus and bridge arms, thereby solving the problem that a sub-module can be charged only, but cannot discharge when the direct-current voltage source is tested separately.

The invention discloses a semi-passive resistance control system having active enhancement, the system being suitable for sports equipment having a dragging assembly. The system comprises a resistance adjusting module, an energy storage device, and a control module. The energy storage device is capable of providing resistance to the dragging assembly when a user pulls the dragging assembly, and reducing the output resistance change generated by increase of the pulling stroke. The control module is capable of passively compensating the output resistance to keep the output resistance stable according to sensing data feed back by a sensor inside the system when the user pulls the dragging assembly as well as actively compensating the output resistance according to a default control mode so as to enable the user to feel the expected resistance.

The invention discloses a method, a device and a system for realizing signal transmission with low power consumption and carrier suppression correction. The method comprises the following steps: analog baseband signals are sent to a transmission low-pass filter, and out-off-band harmonic waves are filtered by the transmission low-pass filter to be output in a mode of low-frequency signals; a direct-current correction module acquires the low-frequency signals output by the transmission low-pass filter and calibrates the low-frequency signals output by the low-pass filter according to the information of the acquired low-frequency signals; the transmission low-pass filter sends the calibrated low-frequency signals to a transmitter mixer, and the transmitter mixer carries out up-conversion treatment on the low-frequency signals and outputs radio-frequency signals; and a passive resistance array attenuator controls the power of the radio-frequency signals output by the transmitter mixer and transmits the radio-frequency signals. In the method, the device and the system provided by the invention for realizing carrier suppression, the passive resistance array attenuator is adopted to realize the purpose of controlling signal power, and the signal power does not need to be biased by current, thereby greatly reducing the power loss.

Memories, current mode sense amplifiers, and methods for operating the same are disclosed, including a current mode sense amplifier including cross-coupled p-channel transistors and a load circuit coupled to the cross-coupled p-channel transistors. The load circuit is configured to provide a resistance to control at least in part the loop gain of the current mode sense amplifier, the load circuit including at least passive resistance.

The invention proposes a preparation method of a passive resistance-capacitance element of an LCP flexible substrate, electroplating a Ni / Pd / Au layer on the copper-clad surface of a clean LCP substrate, sputtering a thin-film resistance layer and a conduction band layer on the copper-clad surface, and performing electroplating , photolithography, wet etching to prepare the resistance and conduction band, and then use the lift-off process to make a capacitor layer on the LCP substrate, and finally sputter the thin film conduction band layer on the surface, and perform electroplating, photolithography, wet method Etching, making the upper electrode and conduction band of the capacitor, and completing the preparation of the passive resistance-capacitance element of the LCP flexible substrate. The manufacturing method utilizes thin-film sputtering technology, which can simultaneously produce thin-film resistors and thin-film capacitors on the LCP substrate at one time, and can also fabricate thin-film resistor-capacitance networks to realize thin-film integration and high-precision control of resistor-capacitor components. The embedding of passive resistance-capacitance components in the device LCP system-in-package can greatly save the surface space of the LCP flexible substrate and increase the assembly density of the substrate.

The invention discloses a high-precision passive resistance generator for compensating hardware error influence. The high-precision passive resistance generator comprises a main control unit, a resistor network and a resistance measuring unit, wherein the resistor network and the resistance measuring unit are connected with the main control unit; the resistor network comprises M serially connected resistors, M normally closed relays which are connected with the resistors in parallel, and M relay driving circuits for controlling corresponding relays to be opened and closed; the relay driving circuits are connected with the main control unit; the main control unit is used for receiving resistance of the resistors in the resistor network and used for confirming an optimal resistance combination mode N by using a hardware error compensation method according to preset resistance R; the resistance is measured by the resistance measuring units; corresponding relays are controlled by the relay driving circuits to be opened and closed, resistors which are connected in parallel correspondingly are in an opened or short circuit state, and passive resistance can be output to compensate hardware error influence. By adopting the high-precision passive resistance generator, the problems that the output precision of a conventional passive resistance generator completely depends on resistance precision and is low in output precision are solved, and the requirement on the precision of a passive resistor in practical use can be met.