DC boost circuit

Abstract

The invention provides a DC boost circuit, which comprises an oscillator for converting a direct current into an alternating current and a rectifier for rectifying and filtering the alternating current output by the oscillator. The DC boost circuit is characterized in that: the oscillator comprises a triode T1, a triode T2, a boosting transformer B2, a current transformer B1 and a capacitor C2; an LC resonance circuit is composed of the capacitor C2 and a primary coil of the boosting transformer B2; a secondary of the current transformer B1 feeds a resonance current back to the triode T1 and the triode T2 so that the triode T1 and the triode T2 are switched on and off alternately to form oscillation, and a battery power supply with low voltage is converted into an alternating current; and a secondary coil of the boosting transformer B2 is connected with an input end of the rectifier. The DC boost circuit has the advantages that: the minimal converted battery voltage can be 1.5V, the single group of battery power supply can be converted into multiple groups of alternating currents for output, the voltage changing rates of the multiple groups of output alternating currents are consistent, the static operating current of the oscillator is only several microamps, and the conversion efficiency is high.

Description

technical field [0001] The invention relates to a direct current voltage boosting circuit, which is used for boosting low voltage direct current. Background technique [0002] In portable instruments, batteries are generally used as the working power supply of the instrument. The voltage of the battery is low, and the lowest nominal voltage of a single battery is only 1.5V. In addition, some instruments require multiple sets of working power, which requires the use of multiple batteries to meet the requirements. Due to the working requirements of the meter, the increase in the number of batteries not only increases the size of the meter, but also requires frequent replacement of the battery due to the inconsistent remaining power of the battery. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a DC booster circuit, which can convert a battery power source with a lower voltage into a DC power source with a higher v...

AI Technical Summary

Problems solved by technology

[0002] In portable instruments, batteries are generally used as the working power supply of the instrument. The voltage of the battery is low, and the lowest nominal voltage of a single battery is only 1.5V. In addition, some instruments require multiple sets of working power, which requires the use of multiple batteries to meet the requirements. Due to the working requirements of the meter, the increase in the number of batteries not only increases the volume of the meter, but also requires frequent battery replacement due to inconsistent remaining battery power.

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