216results about How to "Fast transient response" patented technology

A converter circuit and related technique for providing high power density power conversion includes a reconfigurable switched capacitor transformation stage coupled to a magnetic converter (or regulation) stage. The circuits and techniques achieve high performance over a wide input voltage range or a wide output voltage range. The converter can be used, for example, to power logic devices in portable battery operated devices.

A vertically packaged cellular power converter solves the problems associated with conventional designs and paves the way for a cellular circuit architecture with ultra-low interconnect resistance and inductance. The vertical packaging results in a power flow in the vertical direction (from the bottom to the top) with very short internal interconnects, thereby minimizing the associated conduction losses and permitting high conversion efficiency at high currents. The cellular architecture is ideally suited for generating multiple supply voltages.

A vertically packaged cellular power converter solves the problems associated with conventional designs and paves the way for a cellular circuit architecture with ultra-low interconnect resistance and inductance. The vertical packaging results in a power flow in the vertical direction (from the bottom to the top) with very short internal interconnects, thereby minimizing the associated conduction losses and permitting high conversion efficiency at high currents. The cellular architecture is ideally suited for generating multiple supply voltages.

A DC to DC converter has an inverter, an inductor, a voltage sensor, a comparator, a clock generator, a driver and an output capacitor. The inverter converts an input voltage into a square-wave voltage. The inductor is electrically connected to an output of the inverter. The voltage sensor is electrically connected to the inductor and derives a sense voltage. The comparator compares the sense voltage and a reference voltage. The clock generator generates a reference clock pulse. The driver is triggered by the reference clock pulse and switches the inverter according to an output of the comparator. The output capacitor is electrically connected between the voltage sensor and the ground.

The various embodiments and example provided herein are generally directed to novel multiphase resonant converters. In an embodiment, a multiphase resonant converter comprises N unit resonant converters having inputs and outputs connected in parallel, respectively. Each unit converter comprises an inverter, a LLC series resonant tank, and a rectifier. In a preferred embodiment, the inverters of the N unit converters are driven by N drive signals phase-shifted 2π / N degrees apart. During operation, the current of the multiphase converter is shared among the unit converters, resulting in a smaller current in each unit converter. The smaller current in each unit converter reduces conduction losses, thereby increasing the efficiency of the multiphase converter. In addition, the smaller current in each unit converter reduces the amount of stress placed on individual components of the converter allowing for the use of lower tolerance components. Further, the multiphase converter has automatic current sharing ability.

To provide a digital control switching power-supply device capable of suitably achieving fast transient response at the time of a sudden load change. In parallel with normal digital signal processing means that outputs a PWM pulse signal having a desired duty, transient variation detection means composed of a CR filter provided across an output inductor and a window comparator is provided in preparation for a sudden load change. If a sudden decrease in load is detected, a PWM pulse signal having a duty of 0% is forcedly output, and if a sudden increase in load is detected, a PWM pulse signal having a duty of 100% is forcedly output.

The present invention employs a resonant inductor, a resonant capacitor and a hybrid transformer using a Hybrid-switching method with three switches which results in two distinct switched-networks: one for ON-time interval and another for OFF-time interval. Resonant inductor is placed in series with the hybrid transformer primary to insure the continuity of primary and secondary currents at the switching transitions. The hybrid transformer converts both inductive and capacitive energy storage from the source to the load. The two-phase extension results in tenfold reduction of the output current ripple.Despite the presence of the resonant inductor current during the OFF-time interval, the output voltage is neither dependent on resonant component values nor on the load current but depends on duty ratio D and turns ratio n of the hybrid transformer only. Thus a simple regulation of output voltage is achieved using duty ratio D control.

A digital control system and method for use in switching type voltage regulators measures the rate of the change and the magnitude of the output voltage to change not only the pulse width but also the frequency of the pulses. A voltage regulator according to the present invention creates a more stable output voltage and responds more quickly to sudden changes in current load than prior analog and digitally controlled systems.

A high-speed PWM control apparatus with adaptive voltage position and a driving signal generating method thereof is provided. The present invention automatically detects a change in the loading and adjusts the voltage position instantaneously for stabilizing the voltage and reducing the loading output power consumption. The present invention does not require a clock signal to generate a driving signal and does not require an error amplifier to control the modulation. Therefore, the present invention has a fast transient response that responds to the change of the loading instantaneously and has a stabilizing effect. When the apparatus is on a continuous conduction mode (CCM), the switching frequency of the controller is still fixed even though the input voltage Vin and the output voltage Vout are changed. The electrical-magnetic noise disturbance is improved.

The invention discloses a low dropout linear regulator. Aiming at the problem of complicated structure of the existing low-dropout linear regulator, the LDO of the present invention includes an error amplifier, a feedback sampling network, a bias circuit and a slew rate enhancement circuit, and is characterized in that a part of the slew rate enhancement circuit is included in the error amplifier Among them, the error amplifier includes a first PMOS transistor, a second PMOS transistor, a first NMOS transistor, a second NMOS transistor, a third NMOS transistor, and a fourth NMOS transistor; wherein the first NMOS transistor and the second NMOS transistor serve as slew rate enhancement As a component of the circuit, the slew rate enhancing circuit further includes a first capacitor and a second capacitor. The voltage stabilizer of the present invention constitutes a slew rate enhancement circuit through two NMOS transistors and two capacitors, does not require too many additional auxiliary circuits, has a simple structure and low power consumption, and can be applied without reducing performance. Under low voltage, it has extremely fast transient response.

A regulated power supply having power factor correction control includes a multi-vector error amplifier. The multi-vector error amplifier provides an error signal that is used to regulate a switching mechanism of the power supply. The multi-vector error amplifier acts to provide a low distortion error signal during steady-state operation, while responding rapidly and smoothly to sudden load changes.

A non-electric down-hole formation pressure monitoring system utilizing a typical down-hole chemical injection system for pressure data acquisition used with surface computer integration to produce an accurate picture of formation pressure variations utilizing pressure differentials across a pressure balanced valve located adjacent the chemical injection orifice. Computer controlled manipulation of the injection pump pressure maintains a constant differential pressure across the pressure balance valve thus tracking the well formation pressure deviations. The surface computer monitors pump noise, plumbing noise due to vibration, etc., temperature, and fluid and / or gas coefficients, and compensates for any adverse effects that may affect the accuracy of the formation pressures. Down-hole pressure monitoring is achieved in chemical injection or dedicated pressure-monitoring mode with only minor surface adaptations to the well chemical injection pump skid.

A switched mode converter is disclosed that includes both voltage mode and current mode control. The switched mode converter also includes mode logic for switching between a voltage mode and a current mode. The converter includes current sensing circuitry for sensing the switcher current on the primary side of the transformer and the load current on the secondary side as well as voltage sensing circuitry for sensing the converter output voltage. When the load current is less than a predetermined value, the converter operates in a voltage mode. During the voltage mode, the output voltage of the voltage mode controller is used to control the duty cycle of a pulse width modulation (PWM) controller. When the load current is greater than a predetermined value, the converter operates in a current mode. In a current mode, the primary switcher current is used to control the PWM controller. As such, during a light load in which the converter is voltage controlled, there is no need for a minimum load to stabilize the control loop. In a current-mode, the control loop will have a relatively faster transient response and avoid flux imbalance in push-pull topology. As such, the converter provides the advantages of both known voltage controlled and current controlled switched mode converters. In addition, by the careful arrangement of the locations of a EMC filter, a primary heat sink, a secondary heat sink, a power transformer T1 and other power devices as well as a cooling fan, a smaller EMC filter can be used due to the primary heat sink performing a dual function of thermal management and additionally providing EMC shielding to prevent the noise, for example, the noise generated by the transformer, from reaching the filter. In addition, the primary heat sink is configured to face the air flow while the secondary heat sink is placed close to the fan with its fin direction the same as the direction of the air flow. As such, both the primary and the secondary heat sink get maximum air flow, allowing smaller heat sinks to be used in order to provide a reliable and cost-effective switched mode converter.

A method and apparatus to dynamically modify the internal compensation of a low drop-out (LDO) voltage regulator is presented. The process involves creating an additional equivalent series resistance (ESR) from an internal circuit. The additional ESR of the internal circuit is sufficient to ensure the DC output stability. This allows the ESR of the output capacitance to be reduced to zero if desired, for improved transient response.

The invention discloses a low dropout linear regulator with quick transient response and high stability. The low dropout linear regulator comprises a power adjusting pipe, an error amplifier circuit and an ESR resistor. The error amplifier circuit comprises a main operational amplifier circuit and a buffering drive circuit. The low dropout linear regulator further comprises a transient response improving circuit and a compensation network circuit. The low dropout linear regulator has the advantages that a compensation network is provided to guarantee that when load currents change, phase margin doe not change, and stability of the low dropout linear regulator is guaranteed; an induction capacitor is additionally arranged on the compensation network, so that change of poles can be quickly tracked, moment stability can be maintained when load current jump occurs, and oscillation of output voltages is prevented; a transient response improving circuit structure is designed to improve load transient response, it is guaranteed that output of the transient response improving circuit has quick transient response capacity when the load currents of the output end jump, and grain and the phase margin can not change greatly.

To provide a digital control switching power-supply device capable of suitably achieving fast transient response at the time of a sudden load change. In parallel with normal digital signal processing means that outputs a PWM pulse signal having a desired duty, transient variation detection means composed of a CR filter provided across an output inductor and a window comparator is provided in preparation for a sudden load change. If a sudden decrease in load is detected, a PWM pulse signal having a duty of 0% is forcedly output, and if a sudden increase in load is detected, a PWM pulse signal having a duty of 100% is forcedly output.

The invention discloses a digital LDO circuit with a fast transient response. The digital LDO circuit with the fast transient response comprises a clock-controlled comparator array, a controller, a power switching array, a sampling resistor network and an on-chip capacitor, wherein the controller is used for controlling the number of on-off power switches in the power switching array and then adjusting magnitude of output voltage; and when jumping changes of a load lead to large fluctuations of output voltage, the controller quickly restores the output voltage to a stable state which tends torated output voltage of the circuit by starting dichotomy adjustment. The digital LDO circuit has a high transient state response speed when facing the jumping changes of the output voltage due to different load changes, and in the transient state response, the output voltage is restored to a rated value through a nearly fixed fast adjustment period. Compared with other LDO circuits, the digital LDO circuit adopts a circuit structure of pure digital units, can work in the sub-1V low power supply voltage environment, and has the advantages of being low in static power consumption, high in integration level and fast in transient state response.

This invention relates to a method and system for fast retrieval of the sequence components from phase, frequency and amplitude varying signals and synchronization therewith, and the concept of a system on a chip for power signal processing. More specifically, it relates to a method and system where the sequence components of a three-phase power signal are extracted and filtered in real time using a multirate phase-locked loop and a dual infinite impulse response filter with fault detection and reinitialization.

In a hybrid electric vehicle, a motor may be downstream of an engine and transmission. This configuration can be exploited by using the motor to buffer and control torque changes between the engine and the wheels, thereby reducing driveline backlash and clunk.