CN204794941U

CN204794941U - Voltage selector

Info

Publication number: CN204794941U
Application number: CN201520484280.8U
Authority: CN
Inventors: 师杨勇
Original assignee: Echo (tianjin) Network Technology Co Ltd
Current assignee: Echo (tianjin) Network Technology Co Ltd
Priority date: 2015-07-07
Filing date: 2015-07-07
Publication date: 2015-11-18
Anticipated expiration: 2025-07-07

Abstract

The utility model belongs to the technical field of electronic circuit, especially, relate to a voltage selector, including input module, mains voltage selection circuit, comparison circuit, output module, input module includes input J1, input J2, input J3, mains voltage selection circuit includes field effect transistor Q1, field effect transistor Q2, field effect transistor Q3, field effect transistor Q4, field effect transistor Q5, field effect transistor Q6, field effect transistor Q7, field effect transistor Q8, comparison circuit includes comparison amplifier U1, feedback resistance R1, output module includes output J4. The utility model discloses whole process adopts a comparison amplifier's design, greatly the simplified circuit for used components and parts are than less, and then reduce holistic manufacturing cost and consumption.

Description

A kind of voltage selector

Technical field

The utility model belongs to electronic circuit technology field, particularly relates to a kind of voltage selector.

Background technology

The major function of voltage selector is from multiple existing voltage, select a required voltage to export, and under some workplace, the required voltage that wherein a part has been selected is not long-term existence, but just immediately produce when needing.But current voltage selector, adopts two comparators to compare, its circuit structure is complicated, and power consumption is high, and reliability is low.

Summary of the invention

The utility model provides a kind of voltage selector, and to solve voltage selector current in above-mentioned background technology, circuit structure is complicated, the problem that power consumption is high.

The technical problem that the utility model solves realizes by the following technical solutions: the utility model provides a kind of voltage selector, it is characterized in that: comprise input module, selection circuit for power voltage, comparison circuit, output module, described input module comprises input J1, input J2, input J3, described selection circuit for power voltage comprises field effect transistor Q1, field effect transistor Q2, field effect transistor Q3, field effect transistor Q4, field effect transistor Q5, field effect transistor Q6, field effect transistor Q7, field effect transistor Q8, described comparison circuit comprises comparison amplifier U1, feedback resistance R1, described output module comprises output J4, described input J1 connects the G pole of field effect transistor Q1, the D pole of described field effect transistor Q1 connects the S pole of field effect transistor Q2, its S pole connects the D pole of field effect transistor Q2, the G pole of described field effect transistor Q2 connects the S pole of field effect transistor Q8, and the D pole of described field effect transistor Q8 connects the G pole of field effect transistor Q4, the S pole of field effect transistor Q7, its G pole meets feedback resistance R1, the feedback end of comparison amplifier U1, the S pole of described field effect transistor Q4 connects the D pole of field effect transistor Q3, and its D pole connects the S pole of field effect transistor Q6, the D pole of field effect transistor Q5, the S pole of field effect transistor Q3, described input J2 connects the G pole of field effect transistor Q3, described input J3 connects the G pole of field effect transistor Q5, the S pole of described field effect transistor Q5 connects the D pole of field effect transistor Q6, the G pole of described field effect transistor Q6 connects the D pole of field effect transistor Q7, the G pole of described field effect transistor Q7 connects the input of comparison amplifier U1, the other end of the output termination feedback resistance R1 of described comparison amplifier U1, the positive pole of output J4, the minus earth of described output J4.

Described field effect transistor Q1-Q6 selects the transistor of N road ditch type.

Described field effect transistor Q7-Q8 selects the transistor of P road ditch type.

The beneficial effects of the utility model are:

1, the utility model utilizes the field effect transistor of multiple N roads ditch type and the field effect transistor of P road ditch type to form switching circuit, voltage is selected, compared by comparison amplifier again, finally exported by output J4, whole process, adopts the design of a comparison amplifier, greatly simplifies circuit, make components and parts used fewer, and then reduce overall manufacturing cost and power consumption.

2, the utility model utilizes the unipolarity of field effect transistor, the field effect transistor of multiple N roads ditch type and the field effect transistor of P road ditch type is adopted to form the design of switching circuit, greatly improve the accuracy that voltage is selected, its noise is little, low in energy consumption, dynamic range large, be easy to integrated.

3, the utility model adopts the design of the feedback circuit be made up of feedback resistance R1, and make voltage when selection, comparing, overall losses is little, can stablize and export the voltage identical with input voltage, avoid electric energy loss, saves energy.

4, structure of the present utility model is simple, and each parts are relatively more cheap, easy of integration, low cost of manufacture.

Accompanying drawing explanation

Fig. 1 is circuit theory diagrams of the present utility model.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described further:

Embodiment:

As shown in Figure 1, the present embodiment comprises: input module, selection circuit for power voltage, comparison circuit, output module, input module comprises input J1, input J2, input J3, selection circuit for power voltage comprises field effect transistor Q1, field effect transistor Q2, field effect transistor Q3, field effect transistor Q4, field effect transistor Q5, field effect transistor Q6, field effect transistor Q7, field effect transistor Q8, comparison circuit comprises comparison amplifier U1, feedback resistance R1, output module comprises output J4, input J1 connects the G pole of field effect transistor Q1, the D pole of field effect transistor Q1 connects the S pole of field effect transistor Q2, its S pole connects the D pole of field effect transistor Q2, the G pole of field effect transistor Q2 connects the S pole of field effect transistor Q8, and the D pole of field effect transistor Q8 connects the G pole of field effect transistor Q4, the S pole of field effect transistor Q7, its G pole meets feedback resistance R1, the feedback end of comparison amplifier U1, the S pole of field effect transistor Q4 connects the D pole of field effect transistor Q3, and its D pole connects the S pole of field effect transistor Q6, the D pole of field effect transistor Q5, the S pole of field effect transistor Q3, input J2 connects the G pole of field effect transistor Q3, input J3 connects the G pole of field effect transistor Q5, the S pole of field effect transistor Q5 connects the D pole of field effect transistor Q6, the G pole of field effect transistor Q6 connects the D pole of field effect transistor Q7, the G pole of field effect transistor Q7 connects the input of comparison amplifier U1, the other end of the output termination feedback resistance R1 of comparison amplifier U1, the positive pole of output J4, the minus earth of output J4.

Field effect transistor Q1-Q6 selects the transistor of N road ditch type.

Field effect transistor Q7-Q8 selects the transistor of P road ditch type.

The utility model utilizes the field effect transistor of multiple N roads ditch type and the field effect transistor of P road ditch type to form switching circuit, voltage is selected, compared by comparison amplifier again, finally exported by output J4, whole process, adopts the design of a comparison amplifier, greatly simplifies circuit, make components and parts used fewer, and then reduce overall manufacturing cost and power consumption; Utilize the unipolarity of field effect transistor, adopt the field effect transistor of multiple N roads ditch type and the field effect transistor of P road ditch type to form the design of switching circuit, greatly improve the accuracy that voltage is selected, its noise is little, low in energy consumption, dynamic range large, be easy to integrated; Adopt the design of the feedback circuit be made up of feedback resistance R1, make voltage when selection, comparing, overall losses is little, can stablize and export the voltage identical with input voltage, avoid electric energy loss, saves energy; Structure is simple, and each parts are relatively more cheap, easy of integration, low cost of manufacture.

Utilize technical scheme described in the utility model, or those skilled in the art being under the inspiration of technical solutions of the utility model, designing similar technical scheme, and reach above-mentioned technique effect, is all fall into protection range of the present utility model.

Claims

1. a voltage selector, is characterized in that: comprise input module, selection circuit for power voltage, comparison circuit, output module, described input module comprises input J1, input J2, input J3, described selection circuit for power voltage comprises field effect transistor Q1, field effect transistor Q2, field effect transistor Q3, field effect transistor Q4, field effect transistor Q5, field effect transistor Q6, field effect transistor Q7, field effect transistor Q8, described comparison circuit comprises comparison amplifier U1, feedback resistance R1, described output module comprises output J4, described input J1 connects the G pole of field effect transistor Q1, the D pole of described field effect transistor Q1 connects the S pole of field effect transistor Q2, its S pole connects the D pole of field effect transistor Q2, the G pole of described field effect transistor Q2 connects the S pole of field effect transistor Q8, and the D pole of described field effect transistor Q8 connects the G pole of field effect transistor Q4, the S pole of field effect transistor Q7, its G pole meets feedback resistance R1, the feedback end of comparison amplifier U1, the S pole of described field effect transistor Q4 connects the D pole of field effect transistor Q3, and its D pole connects the S pole of field effect transistor Q6, the D pole of field effect transistor Q5, the S pole of field effect transistor Q3, described input J2 connects the G pole of field effect transistor Q3, described input J3 connects the G pole of field effect transistor Q5, the S pole of described field effect transistor Q5 connects the D pole of field effect transistor Q6, the G pole of described field effect transistor Q6 connects the D pole of field effect transistor Q7, the G pole of described field effect transistor Q7 connects the input of comparison amplifier U1, the other end of the output termination feedback resistance R1 of described comparison amplifier U1, the positive pole of output J4, the minus earth of described output J4.

2. a kind of voltage selector according to claim 1, is characterized in that: described field effect transistor Q1-Q6 selects the transistor of N road ditch type.

3. a kind of voltage selector according to claim 1, is characterized in that: described field effect transistor Q7-Q8 selects the transistor of P road ditch type.