CN106712761A

CN106712761A - Electronic device on and off method

Info

Publication number: CN106712761A
Application number: CN201611134926.5A
Authority: CN
Inventors: 赵伟
Original assignee: Guangdong Hisense Broadband Technology Co Ltd
Current assignee: Guangdong Hisense Broadband Technology Co Ltd
Priority date: 2016-12-11
Filing date: 2016-12-11
Publication date: 2017-05-24
Anticipated expiration: 2036-12-11
Also published as: CN106712761B

Abstract

The present invention discloses an electronic device on and off method. The method comprises a Schmitt trigger, a button and a resistance device connected at the input end of the Schmitt trigger, and a D trigger connected at the output end of the Schmitt trigger. The clock end of the D trigger is connected with the output end of the Schmitt trigger. The negative output end of the D trigger is connected with the data input end of the D trigger. The resistance device comprises a resistor R1, a resistor R2 and a capacitor C1. The positive output end or negative output end of the D trigger each can be used as a control signal electronic device of a power supply. The on and off method enables a function of a single contact on and off power supply through a pure hardware circuit, and implements with a simple, basic device. The circuit structure is simple and low-cost, and reduces power consumption. The on and off method is low-cost, reliable, stable and safe, and has high quality.

Description

A kind of electronic equipment method of switching

Technical field

The present invention relates to the construction applications of a kind of electronic equipment, more particularly to the method for switching that a kind of single contact is switched.

Background technology

At present, electronic equipment, particularly hand-hold electronic equipments, often need single contact switch opening/close power supply.Typically Demand be：Length was started shooting by several seconds, it is necessary to be grown by several seconds again when shutting down.Common method is the method for using single-chip microcomputer standby, etc. Pressing for this button, and the time that timing is pressed are treated, after reaching duration, single-chip microcomputer output action opens or closes the power supply of big system. Single-chip microcomputer mini system powered stand-by operation always.

The method has shortcoming：1.A single-chip microcomputer is needed, but some device systems are simple, plus individual single-chip microcomputer increases multiple on the contrary Miscellaneous degree, limits the application of this method.2.Single-chip microcomputer is a small microsystem, under the influence of the factors such as extraneous interference, There is the job insecurity phenomenon such as program fleet.

The content of the invention

Shortcoming the invention aims to overcome above-mentioned prior art, there is provided a kind of electronic equipment method of switching, should Electronic equipment method completes the function of single contact Switching Power Supply using pure hardware circuit, using only simple basic device just It is achieved that therefore circuit structure is simple, cost is relatively low, can the amount of saving energy, and method of switching cost is relatively low, reliable, surely Fixed, safety, quality is high.

The technical solution adopted for the present invention to solve the technical problems is：A kind of electronic equipment method of switching, including apply close Special trigger, the button and capacitance resistance ware that are connected to Schmidt trigger input, the D for being connected to Schmidt trigger output end Trigger, the clock end of d type flip flop is connected with Schmidt trigger output end, the negative output terminal of d type flip flop and the number of d type flip flop It is connected according to input, capacitance resistance ware includes resistance R1, resistance R2 and electric capacity C1, the positive output end or negative output terminal of d type flip flop are equal Can be used as the control signal of power supply；The method of switching comprises the following steps：

（1）Button is pressed, power supply is charged by resistance R1 to electric capacity C1, make the voltage exported on electric capacity C1 be higher than Schmidt The forward threshold voltage of trigger, makes the output of Schmidt trigger be uprised by low；As the clock of d type flip flop, D triggerings are driven The input state of the data terminal of device passes to output end, and due to the connection of d type flip flop data input pin is negative output end, so D The positive output end of trigger and negative output end are all inverted, so that circuit power is from closing to opening, or from reaching pass；

(2) button unclamps, and power supply is not connected to capacitance resistance ware, and electric capacity C1 is by resistance R1 and R2 electric discharge, electric capacity C1 and Schmidt The voltage of trigger line can be gradually lowered to below the negative sense threshold value of Schmidt trigger, make Schmidt trigger be output as It is low.Button is pressed and how long just causes d type flip flop to export reversion, depending on the parameter and the value of supply voltage of R1 and C1.

Further, described step（1）Middle supply voltage is 3.3 volts, and d type flip flop forward threshold voltage is 1.65 volts, Button presses switch power supply after 3 seconds, and electric capacity C1 is 10 microfarads, and resistance R1 values are 435K, and resistance R2 values are 10K.

In sum, electronic equipment method of the invention completes the work(of single contact Switching Power Supply using pure hardware circuit Can, using only simple basic device it is achieved that therefore circuit structure is simple, cost is relatively low, can the amount of saving energy, and Method of switching cost is relatively low, reliable, and stabilization, safety, quality is high.

Brief description of the drawings

Fig. 1 is the connection block diagram of electronic equipment；

Fig. 2 is the circuit connection diagram of electronic equipment.

Specific embodiment

Embodiment 1

A kind of electronic equipment method of switching described by the present embodiment 1, as depicted in figs. 1 and 2, including Schmidt trigger 3, company The button 1 and capacitance resistance ware 2 that are connected to Schmidt trigger input are, the d type flip flop 4, D for being connected to Schmidt trigger output end The clock end of trigger is connected with Schmidt trigger output end, the negative output terminal of d type flip flop and the data input pin of d type flip flop It is connected, capacitance resistance ware includes resistance R1, resistance R2 and electric capacity C1, and the positive output end or negative output terminal of d type flip flop can be used as electricity The control signal in source；The method of switching comprises the following steps：

The step（1）Middle supply voltage is 3.3 volts, and d type flip flop forward threshold voltage is 1.65 volts, and button is opened after pressing 3 seconds Power supply, electric capacity C1 is 10 microfarads, and resistance R1 values are 435K, and resistance R2 values are 10K.

The above, is only presently preferred embodiments of the present invention, not makees any formal to structure of the invention Limitation.Every any simple modification, equivalent variations and modification made to above example according to technical spirit of the invention, Still fall within the range of technical scheme.

Claims

1. a kind of electronic equipment method of switching, it is characterised in that including Schmidt trigger, be connected to Schmidt trigger input The button and capacitance resistance ware at end, the d type flip flop for being connected to Schmidt trigger output end, the clock end of d type flip flop and Schmidt Trigger output end is connected, and the negative output terminal of d type flip flop is connected with the data input pin of d type flip flop, and capacitance resistance ware includes resistance R1, resistance R2 and electric capacity C1, the positive output end or negative output terminal of d type flip flop can be used as the control signals of power supply；The switch side Method comprises the following steps：

(2) button unclamps, and power supply is not connected to capacitance resistance ware, and electric capacity C1 is by resistance R1 and R2 electric discharge, electric capacity C1 and Schmidt The voltage of trigger line can be gradually lowered to below the negative sense threshold value of Schmidt trigger, make Schmidt trigger be output as It is low.

2. a kind of electronic equipment method of switching according to claim 1, it is characterised in that described step（1）Middle power supply Voltage is 3.3 volts, and d type flip flop forward threshold voltage is 1.65 volts, and button presses switch power supply after 3 seconds, and electric capacity C1 is 10 microfarads, resistance R1 values are 435K, and resistance R2 values are 10K.