Calculator circuit structure for realizing solar cell power supply automatic switching

Abstract

The invention relates to a calculator circuit structure for realizing solar cell power supply automatic switching. The calculator circuit structure comprises: a voltage comparator, wherein a first input end of the voltage comparator is connected with a solar cell of a calculator, and a second input end is connected with a dry cell of the calculator; a power switch, used for selecting the solar cell or the dry cell to supply power to the calculator according to a comparison result output by the voltage comparator; and a voltage stabilizer, connected between the power supply output end of the power switch and the power input end of a load of the calculator. With the adoption of the calculator circuit structure for realizing solar cell power supply automatic switching, three functional modules of the voltage comparator, the power switch and the voltage stabilizer are combined together, so that the functions of voltage comparison, voltage source selection and voltage stabilization during dual-power input can be achieved; and a relatively stable working voltage can be provided for a circuit through the voltage stabilizer, so that the circuit can be better ensured to work stably. Therefore, the calculator circuit structure has a wider application range.

Description

technical field [0001] The invention relates to the technical field of power supply, in particular to the field of switching power supply between solar energy and batteries, and specifically refers to a calculator circuit structure for realizing automatic switching of solar battery power supply. Background technique [0002] In the calculator circuit of the prior art, the solar power supply or the battery is used for dual-battery power supply, and it is necessary to judge and select through an external diode connected to the circuit. The disadvantage of this is that a diode needs to be connected to the outside for battery selection, and the peripheral circuit is more complicated, which will increase the cost of man-hours and components when assembling the whole machine. [0003] Taking the specific peripheral application circuit diagram of a certain calculator circuit CS6027B product that has been mass-produced in the prior art as an example, the background technology is int...

AI Technical Summary

Problems solved by technology

The manufacturing process of germanium tubes is different from the manufacturing process of CMOS. If it is necessary to realize low turn-on diodes on the CMOS process, the process is complicated and difficult.

[0010] (2) When the whole machine is assembled, the peripheral germanium diodes need to be welded. The working voltage of the circuit obtained by the original application will change with the power supply voltage, and the germanium diodes have a certain voltage drop loss.

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