| CPC G05F 1/595 (2013.01) [G01R 19/2506 (2013.01); G05F 1/462 (2013.01)] | 8 Claims |
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1. A voltage regulating apparatus comprising:
a voltage input module, configured to receive an input voltage;
a current determination module that is electrically connected to the voltage input module and configured to determine an adjustment current based on the input voltage and a load current;
a control module that is electrically connected to the current determination module and configured to output a control signal based on the adjustment current; and
a voltage output module that is electrically connected to the voltage input module, to the current determination module, and to the control module, the voltage output module being configured to output a target voltage based on the control signal and the input voltage,
wherein the current determination module comprises a current detection unit, a signal conversion unit, and a current determination unit,
wherein the current detection unit is configured to determine the load current and to obtain a detection voltage based on the load current,
wherein the signal conversion unit is electrically connected to the current detection unit and is configured to convert the detection voltage into a digital signal, and
wherein the current determination unit is electrically connected to the signal conversion unit and is configured to determine the adjustment current based on the digital signal and the input voltage,
wherein the current detection unit comprises a sixth transistor, a seventh transistor, a second operational amplifier, a second resistor, and a first capacitor,
wherein a gate of the sixth transistor is used to receive the control signal, a drain of the sixth transistor is electrically connected to the voltage input module, and a source of the sixth transistor is electrically connected to a positive input terminal of the second operational amplifier and a drain of the seventh transistor;
wherein a negative input terminal of the second operational amplifier is electrically connected to the voltage output module, an output terminal of the second operational amplifier is electrically connected to a gate of the seventh transistor, and a source of the seventh transistor is electrically connected to a first terminal of the second resistor and a first terminal of the first capacitor;
wherein a second terminal of the second resistor and a second terminal of the first capacitor are grounded; and
wherein the first terminal of the second resistor is used to output the detection voltage,
wherein the voltage output module comprises an eighth transistor, a ninth transistor, a tenth transistor, an eleventh transistor, a third operational amplifier, a third resistor, a fourth resistor, and a second capacitor,
wherein a gate of the eighth transistor is electrically connected to the gate of the sixth transistor, a gate of the tenth transistor, and the control module, and is used to receive the control signal;
wherein a drain of the eighth transistor is electrically connected to a drain of the ninth transistor, the drain of the sixth transistor, a drain of the tenth transistor, and the voltage input module;
wherein a source of the eighth transistor is electrically connected to a negative input terminal of the third operational amplifier, the negative input terminal of the second operational amplifier, a first terminal of the third resistor, and a first terminal of the second capacitor, a second terminal of the third resistor is electrically connected to the control module and a first terminal of the fourth resistor, a second terminal of the fourth resistor is grounded, and a second terminal of the second capacitor is grounded;
wherein a gate of the ninth transistor is electrically connected to the control module and is used to receive the control signal, and a source of the ninth transistor is grounded;
wherein a positive input terminal of the third operational amplifier is electrically connected to a source of the tenth transistor and a drain of the eleventh transistor, and an output terminal of the third operational amplifier is electrically connected a gate of the eleventh transistor;
wherein a source of the eleventh transistor is electrically connected to the current determination module and the control module; and
wherein the first terminal of the third resistor is used to output the target voltage.
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