Multipath output circuit

Abstract

The invention discloses a multiplexed output circuit which comprises a first switch, a start-up unit, a self-locking unit, a shutdown signal buffer cell and a shifting unit. The first switch is connected with the start-up unit, and then is spanned on the input end and the output end of the self-locking unit. The input of the self-locking is coupled with an electric power source while the output is coupled with a power supplying end of the shifting unit. One end of the shutdown signal buffer cell is coupled with a shutdown signal output end of the shifting unit while the other end is coupled with electrical power source. The conical point between the first switch and the start-up unit is coupled to a clock input end of the shifting unit. After the shifting unit receives a pulse every time at a clock output end of the shifting unit, the actual output of the shifting unit shifts one bit backwards. The circuit can realize one touch key and multiplexed output. Not only the switch of a function tap position is realized but also the thorough shutoff and open of the electric power source is realized. In addition, the one touch key causes that the appearance of products are more beautiful and the use is more convenient.

Description

technical field [0001] The invention relates to a multiplex output circuit. Background technique [0002] In the past, especially for battery-powered handheld devices, such as electric shavers, electric massagers, etc., to achieve multi-function or multi-gear switching, there are generally two methods: one is to use a mechanical multi-gear switch, the other One is to use a single-chip microcomputer to realize switching through one or more buttons. Using the first method is simple, but the problem is that the contact is oxidized, resulting in poor contact, and it is bulky and clumsy to use. Although the second method can achieve high intelligence, the cost is high, and it cannot achieve the purpose of high quality and low price. Moreover, to completely turn off the power supply, the battery must be removed or an additional mechanical switch must be added. SUMMARY OF THE INVENTION [0003] In order to overcome the above deficiencies, the present invention proposes a multi-...

AI Technical Summary

Problems solved by technology

It is simple to use the first method, but the problem is: contact oxidation leads to poor contact, and it is clumsy to use due to its large size

Although high intelligence can be achieved by using the second method, the cost is high, and the purpose of high quality and low price cannot be achieved. Moreover, to completely shut off the power supply, the battery must be removed or an additional mechanical switch must be added.

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