摘要:
In one embodiment, a regulator circuit is provided. The regulator circuit includes a control circuit configured and arranged to adjust an oscillation frequency of a variable frequency oscillator in response to a feedback signal indicating the regulated output voltage. A charge pump is coupled to an output of the variable frequency oscillator and is configured to charge one or more energy storage elements in response to the output of the variable frequency oscillator. The regulator circuit includes a plurality of output stages, each having an input driven by the output of the charge pump and being configured to drive the regulated output voltage. Each output stage is selectably enabled or disabled in response to respective enable signal provided to the output regulator by an enable control circuit.
摘要:
Power control is facilitated. In accordance with one or more embodiments, power is supplied to power rails of an integrated circuit using a power control circuit including a power regulator and a reset circuit that is responsive to a supply voltage. The power regulator provides power to the power rails, based upon a control signal. The reset circuit controls the power regulator to provide power to the power rails independently of the control signal when the supply voltage is below an operational voltage level, and controls the power regulator to provide power to the power rails in response to the control signal when the supply voltage reaches the operational voltage level.
摘要:
Power supply is facilitated. In accordance with one or more embodiments, a power regulator circuit includes first and second regulators and a controller for controlling operation of the power regulator circuit in standby and normal operational modes. The first and second regulators respectively provide regulated power at main and standby power levels, the standby power level being lower than the main power level. For the standby mode, the controller operates the second regulator for supplying power to an integrated circuit at the standby power level. For transitioning to the normal mode, the controller turns the first regulator on while continuing to operate the second regulator for supplying power to the integrated circuit during a start-up period. After a start-up period (e.g., when the first regulator is up to full power), the controller operates the first regulator for supplying power for operating the processor in a high-frequency mode.
摘要:
Power supply is facilitated. In accordance with one or more embodiments, a power regulator circuit includes first and second regulators and a controller for controlling operation of the power regulator circuit in standby and normal operational modes. The first and second regulators respectively provide regulated power at main and standby power levels, the standby power level being lower than the main power level. For the standby mode, the controller operates the second regulator for supplying power to an integrated circuit at the standby power level. For transitioning to the normal mode, the controller turns the first regulator on while continuing to operate the second regulator for supplying power to the integrated circuit during a start-up period. After a start-up period (e.g., when the first regulator is up to full power), the controller operates the first regulator for supplying power for operating the processor in a high-frequency mode.
摘要:
A system for power regulation is provided. The system includes a plurality of regulator stages and a voltage boost circuit configured to provide a source voltage to a difference amplifier of each regulator stage. The difference amplifier of each regulator stage is configured to compare a feedback voltage to an output voltage of a reference generation circuit. Each regulator stage includes a plurality of output transistors driven by an output of the difference amplifier. The system includes a start-up circuit arranged and configured to power the voltage boost circuit the reference generation circuit while operation in a start up mode.
摘要:
A method for generating a reference voltage includes generating a proportional-to-absolute temperature (PTAT) voltage across a first pseudo resistor. The first pseudo resistor includes a transistor. The method also includes converting the PTAT voltage to a current based on a resistance of the first pseudo resistor. The method also includes mirroring the current using a current mirror circuit and converting the mirrored current to a converted PTAT voltage using a second pseudo resistor. The second pseudo resistor includes a transistor. The first pseudo resistor and the second pseudo resistor include equal transistor types. The method also includes generating a complementary-to-absolute temperature (CTAT) voltage, and summing the converted PTAT voltage and the CTAT voltage to produce the reference voltage. The resulting reference voltage is temperature independent.
摘要:
Power control is facilitated. In accordance with one or more embodiments, power is supplied to power rails of an integrated circuit using a power control circuit including a power regulator and a reset circuit that is responsive to a supply voltage. The power regulator provides power to the power rails, based upon a control signal. The reset circuit controls the power regulator to provide power to the power rails independently of the control signal when the supply voltage is below an operational voltage level, and controls the power regulator to provide power to the power rails in response to the control signal when the supply voltage reaches the operational voltage level.
摘要:
Methods, devices and circuits are provided for power-on-reset circuits with low static power consumption. One such circuit includes a detector that draws current from a supply voltage. The detector detects that the supply voltage has exceeded a trip-point voltage level and then disables current draw from the detector. The detector responds to an enable signal by enabling current draw from the detector. A pulse generator generates a reset signal in response the supply voltage transitioning from a voltage below the trip point voltage level to above the trip point voltage level. A monitor detects that the supply voltage has dropped and provides, in response thereto, the enable signal to the detector to enable current draw from the portion of the detector.
摘要:
Methods, devices and circuits are provided for power-on-reset circuits with low static power consumption. One such circuit includes a detector that draws current from a supply voltage. The detector detects that the supply voltage has exceeded a trip-point voltage level and then disables current draw from the detector. The detector responds to an enable signal by enabling current draw from the detector. A pulse generator generates a reset signal in response the supply voltage transitioning from a voltage below the trip point voltage level to above the trip point voltage level. A monitor detects that the supply voltage has dropped and provides, in response thereto, the enable signal to the detector to enable current draw from the portion of the detector.
摘要:
A system for power regulation is provided. The system includes a plurality of regulator stages and a voltage boost circuit configured to provide a source voltage to a difference amplifier of each regulator stage. The difference amplifier of each regulator stage is configured to compare a feedback voltage to an output voltage of a reference generation circuit. Each regulator stage includes a plurality of output transistors driven by an output of the difference amplifier. The system includes a start-up circuit arranged and configured to power the voltage boost circuit the reference generation circuit while operation in a start up mode.