Abstract: The present invention provides a driving circuit for a driving hip. The driving circuit includes a bootstrap circuit with a bootstrap voltage terminal. A power terminal of a high-voltage driving circuit is connected to the bootstrap voltage terminal, and a ground terminal of the high-voltage driving circuit is connected to a regulating terminal. A high-side drive circuit includes a high-side pull-up circuit and a high-side pull-down circuit. The driving circuit includes: an auxiliary power terminal; a mirror current source an input terminal of the mirror current source being connected to the bootstrap voltage terminal; a first MOS transistor; a second MOS transistor an equivalent diode component, an output terminal of the second MOS transistor being connected to the regulating terminal through the equivalent diode component; and an equivalent resistance component, the gate of the first MOS transistor being connected to the regulating terminal through the equivalent resistance component.

Abstract: The present invention provides a driving circuit for a driving hip. The driving circuit includes a bootstrap circuit with a bootstrap voltage terminal. A power terminal of a high-voltage driving circuit is connected to the bootstrap voltage terminal, and a ground terminal of the high-voltage driving circuit is connected to a regulating terminal. A high-side drive circuit includes a high-side pull-up circuit and a high-side pull-down circuit. The driving circuit includes: an auxiliary power terminal; a mirror current source an input terminal of the mirror current source being connected to the bootstrap voltage terminal; a first MOS transistor; a second MOS transistor an equivalent diode component, an output terminal of the second MOS transistor being connected to the regulating terminal through the equivalent diode component; and an equivalent resistance component, the gate of the first MOS transistor being connected to the regulating terminal through the equivalent resistance component.

Abstract: Isolated circuit systems are provided. The systems include a primary side circuit and a secondary circuit, electrically isolated from each other. The primary side and secondary side circuits each utilize a direct current (DC) reference signal. The primary side circuit may use the DC reference signal in a modulation operation. The secondary side circuit may use the DC reference signal in a demodulation operation. The DC reference signal may be sent from the primary side circuit to the secondary side circuit, or from the secondary side circuit to the primary side circuit.

Abstract: Power isolators for providing electrical isolation between an input port and an output port that exhibit low electromagnetic interference (EMI) are described. The low EMI may be achieved by, for example, canceling out a common mode current across a transformer in the power isolator that may be converted into EMI. The power isolator may include at least one oscillator circuit that is configured to apply a first signal to a first transformer and a second, different signal to a second transformer. The first and second signals may be configured such that the common mode current generated in each of the first and second transformers has an opposite direction. Thus, the common mode currents in the first and second transformers may at least partially cancel out. As a result, the EMI exhibited by the power isolator may be reduced.

Abstract: Isolated circuit systems are provided. The systems include a primary side circuit and a secondary circuit, electrically isolated from each other. The primary side and secondary side circuits each utilize a direct current (DC) reference signal. The primary side circuit may use the DC reference signal in a modulation operation. The secondary side circuit may use the DC reference signal in a demodulation operation. The DC reference signal may be sent from the primary side circuit to the secondary side circuit, or from the secondary side circuit to the primary side circuit.

Abstract: Power isolators with multiple selectable feedback modes are described. The power isolators may transfer a power signal from a primary side to a second side. A feedback signal may be provided from the secondary side to the primary side to control generation of the power signal on the primary side. In this manner, the power signal provided to the secondary side may be maintained within desired levels. The feedback signal may be generated by feedback circuitry configurable to operate in different modes, such that the feedback signal may be of differing types depending on which feedback mode is implemented.

Abstract: Micro-scale planar-coil transformers including one or more shields are disclosed. The one or more shields can block most common-mode current from crossing from one side to another side of a transformer. Reduction of common-mode current crossing the transformer results in reduction of dipole radiation, which is the main component of electromagnetic interference (EMI) in some transformers.

Abstract: This invention provides an integrated chair frame motor transmission assembly for adjusting the position of a chair backrest bracket, including a bracket. A fixing part fixed to the chair frame is arranged at an upper end and a lower end of the bracket. A motor speed reducing module is fixed to the bracket, and one end of a screw rod is connected to the motor speed reducing module. The other end of the screw rod is connected to a fixing block, and the fixing block is fixed to the bracket. A sliding groove is formed in the bracket, and a sliding block is arranged corresponding to the sliding groove. The screw rod is matched with and connected to the sliding block and drives the sliding block to move back and forth along the sliding groove.

Abstract: Power isolators with multiple selectable feedback modes are described. The power isolators may transfer a power signal from a primary side to a second side. A feedback signal may be provided from the secondary side to the primary side to control generation of the power signal on the primary side. In this manner, the power signal provided to the secondary side may be maintained within desired levels. The feedback signal may be generated by feedback circuitry configurable to operate in different modes, such that the feedback signal may be of differing types depending on which feedback mode is implemented.

Abstract: Power isolators for providing electrical isolation between an input port and an output port that exhibit low electromagnetic interference (EMI) are described. The low EMI may be achieved by, for example, canceling out a common mode current across a transformer in the power isolator that may be converted into EMI. The power isolator may include at least one oscillator circuit that is configured to apply a first signal to a first transformer and a second, different signal to a second transformer. The first and second signals may be configured such that the common mode current generated in each of the first and second transformers has an opposite direction. Thus, the common mode currents in the first and second transformers may at least partially cancel out. As a result, the EMI exhibited by the power isolator may be reduced.

Abstract: This invention provides an integrated chair frame motor transmission assembly for adjusting the position of a chair backrest bracket, including a bracket. A fixing part fixed to the chair frame is arranged at an upper end and a lower end of the bracket. A motor speed reducing module is fixed to the bracket, and one end of a screw rod is connected to the motor speed reducing module. The other end of the screw rod is connected to a fixing block, and the fixing block is fixed to the bracket. A sliding groove is formed in the bracket, and a sliding block is arranged corresponding to the sliding groove. The screw rod is matched with and connected to the sliding block and drives the sliding block to move back and forth along the sliding groove.

Abstract: A power converter may include an amplifier that generates an error signal, a modulator that generates a modulated error signal, an isolator that generates an isolated modulated error signal, and a demodulator that generates an isolated error signal, which may be substantially proportional to the difference between the output signal and the reference signal, and a controller that controls a power stage to generate the output signal of the power converter.

Abstract: A power converter may include an amplifier that generates an error signal, a modulator that generates a modulated error signal, an isolator that generates an isolated modulated error signal, and a demodulator that generates an isolated error signal, which may be substantially proportional to the difference between the output signal and the reference signal, and a controller that controls a power stage to generate the output signal of the power converter.