Power supply

Abstract

The invention discloses a power supply which comprises a millivolt power supply module (1), an adjustable power supply module (2), a diode D2 and a power amplifier module (3); the output end of the adjustable power supply module (2) is firstly connected with the output end of the millivolt power supply module (1) through the diode D2 and then connected with the input end of the power amplifier module (3); the output end of the adjustable power supply module (2) is connected with the anode of the diode D2; the output end of the millivolt power supply module (1) is connected with the cathode ofthe diode D2; and the output end of the power amplifier module (3) is used as the output end of the power supply. The power supply has the advantages of simple circuit, small volume and low cost, andis convenient to operate, does not need complex external circuits, and is particularly suitable for supplying power for a sensor.

Description

technical field [0001] The invention relates to a power supply. Background technique [0002] When supplying power to the sensor, there are often more requirements for the power supply. Many sensors (such as some sensors in engineering vehicles) require a start-up voltage of about 0.5V, a continuously adjustable voltage within a range of 5V, and a power supply with an output power of 5W. [0003] In the prior art, a millivolt power supply that can provide a voltage of 0.5V and an adjustable power supply that can provide a voltage range of 0-5V are generally used, and the two power supplies are controlled by a single-chip microcomputer, and the power supply is continuously switched to supply power to the sensor. . [0004] However, using the above method to supply power to the sensor requires two power supplies to supply power at the same time, and the two power supplies also need complex external circuits when connected, so the wiring is complicated, the volume is large, a...

AI Technical Summary

Problems solved by technology

[0004] However, using the above method to supply power to the sensor requires two power supplies to supply power at the same time, and the two power supplies also need complex external circuits when connected, so the wiring is complicated, the volume is large, and it needs to be controlled by a single-chip microcomputer for continuous power switching. So the operation is cumbersome, and the millivolt power supply is usually more expensive, so the cost is higher

Images