86 results about "Center tap" patented technology

The invention discloses a voltage-controlled oscillator and a sub-sampling phase-locked loop, and relates to the technical field of phase-locked loops. The voltage-controlled oscillator comprises two negative resistance transistors and a three-layer coil structure; the three layers of coil structures are respectively a drain coil, a grid coil and a source coil from outside to inside; the gate coil and the drain coil are both of an octagonal structure, and the source coil is of a splayed structure; the drain coil, the source coil and the grid coil are all provided with center taps, the center tap of the source coil is connected with a power voltage module, the center tap of the drain coil is grounded, and the connection point of the center tap of the source coil and the power voltage module and the connection point of the center tap of the drain coil and the ground are located on the same side of the drain coil. And the two negative resistance transistors are positioned on the other side of the drain coil. According to the invention, automatic alignment of second harmonics in a wide frequency range is realized. And meanwhile, an extra chip area is not increased.

The invention discloses a self-voltage-sharing bipolar phase-shifted full-bridge converter based on a coupling inductor, which comprises a full-bridge circuit, a high-frequency transformer Tr, a leakage inductor Lk, a blocking capacitor Cb, a full-bridge rectifying circuit, filter inductors Lf1 and Lf2 and a bipolar output circuit, a leakage inductor and a blocking capacitor are connected in series and then connected to the primary side of the high-frequency transformer; the high-frequency transformer comprises a primary winding and a secondary winding with a center tap, and the secondary winding is connected with the full-bridge rectifier circuit; the invention further provides a control method of the bipolar phase-shifted full-bridge converter. The novel bipolar port self-voltage-equalizing method based on the coupling inductor is adopted, output port voltage balance under any load condition is achieved without adding any additional device and voltage-equalizing control, and the method has the advantages of being low in cost, easy to control and wide in adjusting range.

This invention belongs to the field of wireless communication technology. It provides a differential amplifier system and a method for improving common-mode stability. The invention uses a large decoupling capacitor C1 at the transformer center tap to provide AC ground, and a common-mode resistor R1 to improve the circuit's common-mode stability. Since the common-mode resistor R1 is not in the differential signal loop path, the use of common-mode resistor technology does not affect differential-mode performance. Because the required common-mode resistor value is small, this design occupies a small layout area. This invention solves the problem of low common-mode stability in differential amplifiers.

This invention discloses a millimeter-wave broadband high harmonic suppression tripler, comprising an input matching network, a time-domain shaping tripler unit, and a differential common-source output stage. The proposed time-domain shaping tripler unit employs transistor pairs with different gate widths and bias voltages to superimpose two sets of voltage signals of different amplitudes in the time domain, thereby enhancing the inherent harmonic suppression of the tripler unit. Furthermore, by connecting a common-mode impedance control in series at the center tap of the primary inductor coil of the output transformer of the tripler unit, the output power of the third harmonic is further improved. The input matching network achieves single-ended to differential conversion, with its primary and secondary coil center taps grounded and open-circuited respectively in a counterintuitive manner, improving differential-mode balance and common-mode stability. Simultaneously, by using a series-coupled inductor, the quality factor of the transistor input impedance is reduced, improving the bandwidth performance of the tripler.

The utility model relates to the technical field of electronic power, in particular to a positive and negative voltage output circuit based on coreless transformer isolation, which comprises a cross-coupled oscillation circuit, a coreless transformer and a rectification filter circuit, the cross-coupled oscillation circuit generates sine wave oscillation, and energy is transmitted to a secondary coil through a primary coil of the coreless transformer. The secondary coil adopts a center tap structure, the rectification filter circuit receives signals transmitted by the secondary coil, and stable positive and negative voltage output is realized through rectification and filtering processing. High-efficiency energy transmission is realized through the coreless transformer, the voltage isolation capability is improved, electromagnetic interference is reduced, and the coreless transformer has the advantages of compact structure, low cost, high power density and the like, and is suitable for solid-state switch driving, high-frequency power conversion and other electronic power systems.

Embodiments herein disclose an inductor-capacitor voltage controlled oscillator (LC-VCO) circuit. The LC-VCO circuit includes: an LC tank circuit including a center tap inductor connected in parallel with a capacitor bank without a varactor, where the LC tank circuit resonates to generate an oscillation voltage; and a control circuit connected to a varistor capacitance circuit, where the varistor capacitance circuit includes a varistor based on a voltage controlled transistor in series with at least one capacitor, the varistor capacitance circuit is connected in parallel with the LC tank circuit and connected to a negative transconductance circuit. The control circuit includes an error amplifier and a conversion circuit, and is configured to generate an output control voltage based on an input phase-locked loop (PLL) control voltage that controls a capacitance value of the varistor capacitance circuit through the variable resistor.

Provided is a phase-shifted full bridge center-tapped converter with a protection circuit. The converter includes a primary side circuit having a full bridge structure and a secondary side circuit having a center-tap structure. The converter further includes a protection circuit configured to transfer energy from the secondary side circuit to the primary side circuit, based on an operation stop.

A wireless circuit is provided that includes at least a first amplifier, a second amplifier, and a power distribution transformer coupled to the first amplifier and the second amplifier. The first amplifier may include a first input transistor, and the second amplifier may include a second input transistor. The power distribution transformer may include: a primary coil; a first secondary coil having a terminal coupled to a gate terminal of the first input transistor and having a center tap configured to receive a first bias voltage; and a second secondary coil having a terminal coupled to the gate terminal of the second input transistor, and having a center tap configured to receive a second bias voltage. The first amplifier and the second amplifier may output a signal to a power combining transformer. The power combination transformer may have a first primary coil, a second primary coil, and a secondary coil all disposed within a single compact transformer footprint.

An RF differential system comprises an RF differential circuit and a winding connected to the RF differential circuit. The winding has a center tap. A bias terminal is provided to receive a bias signal. A suppression network is connected between the center tap and the bias terminal.

The invention belongs to the technical field of avionics testing and signal simulation, and discloses an LVDT analog simulation circuit and a signal simulation method thereof, and the LVDT analog simulation circuit comprises a main control module, a communication interface module, an excitation signal processing module and a sensor signal simulation output module. The main control module receives an external displacement setting instruction through the communication interface; the excitation signal processing module comprises a DAC unit and an excitation conditioning unit and is used for generating amplitude control voltage and conditioning an external LVDT excitation signal; the sensor signal simulation output module serves as a core and comprises a difference value control unit, a sum value control unit, a summation unit and a differencing unit, a conditioned excitation signal and amplitude control voltage are synthesized through an analog multiplier and an operational amplifier circuit, and finally three-phase differential signals (a high end, a low end and a center tap) simulating a real LVDT sensor are output. A mechanical LVDT is replaced by a full-electronic mode, high-precision, programmable and flexible simulation of displacement signals is achieved, the device is particularly suitable for occasions needing high-reliability LVDT interface testing and verification such as an aviation flight control system, and the device has the advantages of being low in cost, high in flexibility and easy to integrate automatic testing.

This suppresses stress on the switching element, enabling pre-charging in a short time. [Solution] A transformer including a first switching element with one end connected to a first terminal, a second switching element connected between the other end of the first switching element and a second terminal, a third switching element with one end connected to the first terminal, a fourth switching element connected between the other end of the third switching element and a second terminal, a first winding connected between the other end of the first switching element and the other end of the third switching element, and a second winding magnetically coupled to the first winding; an inductor section connected between the center tap of the second winding and a third terminal; a fifth switching element connected between one end of the second winding and a fourth terminal; a sixth switching element electrically connected between the other end of the second winding and a fourth terminal; a first switch connected between one end of the fifth switching element and a third terminal; and a second switch connected between one end of the sixth switching element and a third terminal.

This invention discloses a bidirectional bipolar input / output DC-DC converter topology, which is an asymmetric structure centered on a high-frequency transformer T1 with a center tap. It includes a first circuit unit, the high-frequency transformer T1, and a second circuit unit connected in sequence. The first circuit unit employs a half-bridge or full-bridge structure, and the second circuit unit also employs a half-bridge or full-bridge structure. At least one of the first and second circuit units uses a bidirectional switching structure with two switches connected in reverse series, enabling mutual conversion between the bipolar voltages of the first and second circuit units, thus multiplying the voltage variation range on the output side. This invention improves upon traditional bipolar DC-DC converters, achieving stable and adjustable voltage gain by changing the switching frequency while realizing high-frequency, high-efficiency bipolar DC-DC conversion, significantly improving the converter's wide-range voltage supply capability.

The present invention relates to a method for operating power electronics (1) for converting electrical energy from a vehicle electrical system (201) into heat by means of a consumer arrangement (50) consisting of two consumers (51). The power electronics (1) has three parallel connected half-bridges (2, 3, 4) each with a center tap (9) and two switching elements (10, 11), wherein the switching elements (10, 11) are switched in such a way that they connect the consumers (51) individually to the vehicle electrical system (201) and to each other. The invention also relates to a power electronics arrangement (100) with such power electronics (1) and a computer program product for carrying out the method.

An inductor device includes a first trace, a second trace, an input / output terminal, a center tap terminal, and a staggered connection. The first trace is located on a first layer. The second trace is located on the first layer. The input / output terminal is disposed on a first side of the inductor device. The center tap terminal is disposed on a second side of the inductor device. The staggered connection is disposed on a third side or a fourth side of the inductor device and is configured to couple the first trace or the second trace. The input / output terminal and the center tap terminal are not connected by the staggered connection.

The invention relates to a resonant converter comprising a transformer (T) which comprises a primary winding (L6) and a secondary winding (L1, L2), wherein - the secondary winding (L1, L2) is divided into a first secondary winding section (L1) and a second secondary winding section (L2); - the primary winding (L6), the first secondary winding section (L1) and the second secondary winding section (L2) are arranged next to one another on a common limb of a magnetic core of the transformer (T); - the primary winding (L6) is arranged between the first secondary winding section (L1) and the second secondary winding section (L2); - the first secondary winding section (L1) and the second secondary winding section (L2) are each spaced apart from the primary winding (L6) by a distance (a); - the first secondary winding section (L1) and the second secondary winding section (L2) are interconnected in a centre tap circuit; - the first secondary winding section (L1) is connected in series with a first rectifier element (M1) in a first rectifier branch and the second secondary winding section (L2) is connected in series with a second rectifier element (M2) in a second rectifier branch; and - a discharge unit is arranged in the resonant converter and can be used to discharge energy stored in leakage inductances of the secondary winding sections (L1, L2) during a charge reversal of the first rectifier element (M1) and / or the second rectifier element (M2).

The invention discloses a resonant power converter and a control method thereof. The resonant power converter comprises two bridge arms, a first resonant connection point and a second resonant connection point of the resonant power converter are connected with the two ends of a first side winding respectively, and at least one of the first bridge arm, the second bridge arm and a center tap of the first side winding is connected with an input circuit through an input inductor. The first bridge arm operates in three switching modes in the switching period, and the total operation time of the second switching mode and the third switching mode is equal to the operation time of the first switching mode. The second bridge arm operates in the same switching mode as the first bridge arm, but the phase difference between the driving signal of each switching tube and the corresponding signal of the first bridge arm is 180 degrees. When the first bridge arm operates in the first switching mode, the input voltage of the second side winding is a first voltage value; when the first bridge arm operates in the second switching mode or the third switching mode, the input voltage of the second side winding is a second voltage value.

The invention relates to a double inverter (1) comprising a first inverter (2.1) and a second inverter (2.2), each comprising three half-bridges made of semiconductor switches (S1 to S12), each with three phase connections, between which an electric machine (3) is connected, the machine having three stator windings (L1, L2, L3), wherein a switchable connection (4) is provided between the high-voltage potentials (HV+, HV-) of the two inverters (2.1, 2.2), the first of which is connected to a battery (5), wherein a disconnecting element (S13) is arranged in one of the two high-voltage potentials (HV+, HV-) of the connection (4) between the battery (5) and the second inverter (2.2) and / or between the two inverters (2.1, 2.2), wherein the battery (5) comprises two electrically series-connected partial batteries (5.1, 5.2).2) has a central tap which is connected via a unidirectionally or bidirectionally lockable switching element (S_Umladen) to a connection point of a switching function or switching device (7) through which three terminals of the stator windings (L1, L2, L3) of the electric drive machine (3) can be switched to a star point (8).

This invention discloses a light-emitting stitching driver, control system, and control method. The driver includes a voltage regulation unit, an inverter unit, and a control unit. The voltage regulation unit adopts a PWM-to-DAC feedback mechanism, whereby the PWM signal output by the microcontroller is filtered by RC and fed back to the FB pin of the DC-DC chip to achieve continuous voltage regulation. The inverter unit uses a center-tapped transformer and a dual MOSFET topology. The control unit outputs a 100kHz carrier SPWM signal, and the frequency step adjustment from 200Hz to 2.5kHz is achieved by changing the number of sampling points in the half-cycle of the sine wave. This invention simplifies the circuit structure, reduces costs, and realizes digital dimming and frequency modulation, making it suitable for automotive interior ambient lighting.

The invention relates to a motor vehicle with motor vehicle-to-grid functionality, comprising an electric machine, a high-voltage battery, an inverter, and a disconnect switch, wherein the high-voltage battery is connected to the inverter to supply the inverter with energy, and the inverter is connected to the electric machine and configured to supply the electric machine with energy, wherein the inverter is configured as a three-phase inverter, wherein the inverter comprises a first inverter circuit configured to supply the electric machine and a second inverter circuit configured to supply the electric machine, wherein the inverter is configured as a resonant inverter, and wherein the electric machine is configured as an open-end winding configuration with split input windings for each of the phases and a three-phase center tap, wherein the center tap is connected to a disconnect switch.

An integrated circuit (IC) for driving a Controller Area Network (CAN) bus is provided. The IC may include a push-pull transformer having a primary winding split into two halves with a center tap and a secondary winding split into two halves, an energy pump circuit coupled to the primary winding, the energy pump circuit including a first transistor and a second transistor alternately switching to drive the primary winding, at least two diodes coupled to the secondary winding to perform full-wave rectification of an alternating current (AC) voltage induced in the secondary winding, and a smoothing capacitor coupled to the secondary winding to filter the rectified voltage into a steady direct current (DC) output for driving the CAN bus.

The invention provides an insulation detection circuit and method, and relates to the technical field of underwater robot detection. The insulation detection circuit comprises a wide-fluctuation high-voltage bus insulation sampling part used for collecting the voltage of the underwater robot; the center tap light-operated MOS gating component is used for collecting voltage signals of different ends of the wide-fluctuation high-voltage bus insulation sampling component; the center tap voltage amplification part is used for processing the voltage signal; the MCU controller is used for gating the center tap light-operated MOS gating part so that the center tap light-operated MOS gating part can collect voltage signals of different ends, and according to the voltage signals processed by the center tap voltage amplification part, an insulation resistance value is calculated so as to detect the insulation state of the underwater robot. According to the invention, the unbalanced bridge resistance method is combined with the cooperation of the seven high-voltage non-inductive resistors and the gating circuit, so that the voltage signal change is accurately captured, and the problems of insufficient detection precision and difficulty in capturing tiny insulation change in the prior art are effectively solved.

The invention belongs to the field of wireless communication, and particularly provides an on-chip integrated electronic balance duplexer, so that the duplexer can simultaneously transmit and receive at the same frequency, and the limitation that a traditional duplexer needs to work at different frequency bands is eliminated. The electronic balance duplexer is composed of switches SW1-SW4, a transformer and an RC impedance tuning module. A primary coil of the transformer is connected with a differential signal output by the TX circuit, one end of a secondary coil of the transformer is connected with an antenna through a switch SW1, the other end of the secondary coil of the transformer is grounded through a switch SW4, and meanwhile, the grounding end of the secondary coil of the transformer is connected with an RC impedance tuning module; the center tap of the secondary coil of the transformer is connected with the input end of the RX circuit through the switch SW3, and meanwhile the input end of the RX circuit is connected with the antenna through the switch SW2. In conclusion, through impedance balance of the RC impedance tuning module and the antenna, the principle of TX signal cancellation is realized, so that TRX signals work at the same time and at the same frequency, the applicability is wide, and on-chip integration is easy to realize.

A monolithic integrated microwave circuit (MMIC) with integrated electrical overload protection, the MMIC comprising: a signal contact point (101) configured to receive a radio frequency (RF) signal; a first ground contact point (102); a balun (125) comprising a primary section (135) configured to receive the RF signal and a secondary section (136) configured to output a differential RF signal; an amplifier (21) configured to amplify the differential RF signal; and a first protective inductor (151) electrically connected between a center tap of the primary section (135) and the first ground contact point (102) and operating to protect the amplifier (21) against electrical overload.

Power supply circuit used in a photovoltaic power generation system, comprising a switch K1, a current limiting device, a capacitor C1, a switch K2, and a CCFL converter circuit, wherein one end of switch K1 is a positive input of the power supply circuit, and another end of switch K1 is connected to one end of the current limiting device, and another end of the current limiting device is connected to both one end of capacitor C1 and one end of switch K2, and another end of capacitor C1 is a negative input of the power supply circuit, and a positive input of the CCFL converter circuit is connected to another end of switch K2, and a negative input of the CCFL converter circuit is connected to the negative input of the power supply circuit.and a first output of the CCFL converter circuit is a first output of the power supply circuit, and a second output of the CCFL converter circuit is a second output of the power supply circuit; wherein switch K1 is switched off upstream of switch K2 when a photovoltaic string is activated, and the CCFL converter circuit is supplied with an operating voltage by means of capacitor C1; and wherein the CCFL converter circuit comprises at least a start-up circuit, an inductor L2, a capacitor C3, a triode TR1, a triode TR2, a transformer B, primary windings NP1 and NP2, feedback windings NB1 and NB2, and a secondary winding NB1, wherein the start-up circuit has at least two terminals,comprising a start-up input and a start-up output; wherein the start-up input is connected to the other end of switch K2 and the start-up output is connected to a center tap of the feedback windings NB1 and NB2; wherein the emitters of triodes TR1 and TR2 are connected to the other end of capacitor C1, and collectors are connected to terminals of the primary winding NP1 and NP2 respectively, and the collectors are also connected to both terminals of capacitor C3, and ground electrodes are connected to terminals of the feedback winding NB1 and NB2 respectively; wherein a center tap of the primary windings NP1 and NP2 is connected via inductor L2 to the other end of switch K2; wherein one end of the secondary winding NB1 is the first output of the CCFL converter circuit and another end of the secondary winding NB1 is the second output of the CCFL converter circuit.

Embodiments herein disclose an inductor-capacitor voltage-controlled oscillator VCO circuit. The LC-VCO circuit includes a center tapped inductor connected in parallel with a varactorless capacitor bank, where the LC tank circuit resonates to produce an oscillating voltage; and a control circuit connected to a varistor capacitance circuit that comprises a voltage-controlled transistor based variable resistor in series with at least one capacitor, the varistor capacitance circuit being connected in parallel with the LC tank circuit and to a negative trans-conductance circuit. The control circuit includes an error amplifier and a conversion circuit configured to generate an output control voltage based on an input phase locked loop (PLL) control voltage, the output control voltage controlling a value of a capacitance for the varistor capacitance circuit through the variable resistor.

The invention provides a power supply system, a vehicle and a power supply system control method, and the system comprises a full-bridge inverter switch, a first output half-bridge conversion bridge arm, a second output half-bridge conversion bridge arm, two output bus capacitors, a transformer, an output filter inductor, and an output filter capacitor. A secondary winding of the transformer is connected with the midpoint of the first output half-bridge conversion bridge arm and the midpoint of the second output half-bridge conversion bridge arm, the output bus capacitor is connected between the bridge arm high end and the bridge arm low end of the output half-bridge conversion bridge arm, and a center tap of the secondary winding of the transformer is connected with the first end of the output filter inductor. The second end of the output filter inductor is connected with the positive electrode of the output filter capacitor, and the lower end of the output half-bridge conversion bridge arm is connected with the negative electrode of the output filter capacitor. According to the scheme, the ripple current flowing through the output filter capacitor is almost zero, the type selection of the filter capacitor is easy, the number of the filter capacitors connected in parallel is small, meanwhile, the output ripple voltage is also almost zero, and the quality of the output voltage is very good.

A detection device for a position sensor and to a detection system comprising such a detection device. The detection device comprises, in some embodiments, at least one primary winding and a secondary winding circuit. The secondary winding circuit has a plurality of secondary windings which are inductively coupled to the at least one primary winding during operation of the detection device, and the plurality of secondary windings is designed as two sinusoidal coils, each having a center tap.

The present application relates to a kind of voltage of standard amplitude that can output, the flyback BUCK circuit, the flyback BUCK circuit includes flyback high-frequency transformer (1), the flyback high-frequency transformer (1) has at least two outputs;Two of the at least two outputs are formed by the center tap of the secondary winding of transformer First output (A) and second output (B);The output end of the first output (A) is equipped with the first voltage stabilizing module (21) that can make the output end maintain stable positive standard amplitude voltage, the output end of the second output (B) is equipped with the second voltage stabilizing module (22) that can make the output end maintain stable negative standard amplitude voltage.The circuit output is stable, simple structure.

The utility model discloses a 10 gigabit Ethernet lightning stroke protection isolation transformer. The 10 gigabit Ethernet lightning stroke protection isolation transformer comprises a packaging part; the substrate is arranged on the inner side of the packaging part, the substrate comprises a plurality of channels and at least one real grounding circuit, each channel comprises a common-mode noise suppression coil and an isolation transformer, an overvoltage protection unit is arranged between a center tap port of the isolation transformer and the real grounding circuit, and the overvoltage protection unit comprises an overvoltage protection circuit and an overvoltage protection circuit. And the input loss of the channel is not more than 1.5 dB when the frequency is 1 to 200 MHz, is not more than 2.0 db when the frequency is 200 to 400 MHz, and is not more than 3.0 db when the frequency is 400 to 500 MHz. According to the utility model, the anti-interference capability and lightning protection performance of the 10 gigabit Ethernet can be effectively improved, more stable and reliable high-speed transmission quality is provided, and the requirements of modern communication equipment for high efficiency and high reliability are met.

This invention provides an ultra-fast commutation square-wave AC welding power supply, comprising: a rectifier bridge circuit for rectifying AC to DC; a filter and voltage regulator circuit for eliminating high-order ripple and obtaining smooth DC; a full-bridge inverter circuit for converting DC to high-frequency AC; a high-frequency transformer for isolation and voltage reduction; a secondary full-bridge rectifier circuit for converting high-frequency AC to DC; a coupling inductor for coupling; a half-bridge inverter circuit for converting DC to AC square waves; and a constant voltage clamping circuit; the load is connected between the midpoint of the half-bridge inverter circuit and the center tap of the high-frequency transformer. This power supply enables faster commutation of square-wave AC current and energy recovery during the commutation process, thereby improving the stability of the AC welding process and the conversion efficiency of the square-wave AC welding power supply.