Patent ID: 11916481
Assignee: FREMONT MICRO DEVICES CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. The Buck constant voltage driver according to claim 2, wherein the adding circuit comprises a second MOS tube, a third MOS tube, a fourth MOS tube, a fifth MOS tube, a second capacitor and a third capacitor, wherein control terminals of the second MOS tube and the fourth MOS tube are operable to receive a first control signal and are switched on and off simultaneously, wherein control terminals of the third MOS tube and the fifth MOS tube are operable to receive a second control signal and are switched on and off simultaneously, wherein the first control signal and the second control signal are complementary non-overlapping signals;
wherein an input terminal of the second MOS tube is connected with an output terminal of the superposition coefficient circuit, an output terminal of the second MOS tube is connected with an input terminal of the fourth MOS tube, and an output terminal of the fourth MOS tube outputs a compensated first reference voltage; an input terminal of the third MOS tube receives the preset first reference voltage, an output terminal of the third MOS tube is connected with an input terminal of the fifth MOS tube, and an output terminal of the fifth MOS tube is connected with the chip ground; wherein the second capacitor is connected between the output terminal of the second MOS tube and the output terminal of the third MOS tube, and the third capacitor is connected between the output terminal of the fourth MOS tube and the output terminal of the fifth MOS tube.