CN207543331U - A kind of energy-saving circuit - Google Patents

Abstract

A kind of energy-saving circuit of the utility model, including detection circuit, amplifying circuit and output circuit, the detection circuit connects amplifying circuit, the amplifying circuit is powered by VCC power supplys and connects the third foot of clamp diode, and the first foot and crus secunda of the clamp diode are grounded and connect respectively output circuit.The utility model beneficial effect：When detection circuit long-time（Such as 20 minutes）When detecting not audio signal, energy-saving circuit can be automatically controlled into standby mode, so as to fulfill energy saving.

Description

A kind of energy-saving circuit

Technical field

The utility model is related to sound technique field, specifically a kind of automatic detection audio signal, autostop it is energy saving Circuit.

Background technology

Sound equipment is multimedia equipment common in household, for playing specific sound, often in television set, various broadcastings Device, computer or mobile phone etc. link together use.With science and technology and the development of life, people will to the experience of multimedia amusement Ask also higher and higher.

In order to more energy saving, when stereo set long-time no audio signal, how to carry out automatic stand-by and realize it is energy saving, It is those skilled in the art's technical issues that need to address.

Utility model content

The purpose of this utility model is to provide one kind when stereo set long-time no audio signal, the section of automatic stand-by Can circuit, the technical issues of to solve in background technology.

To realize foregoing purpose, the utility model provides following technical solution：

A kind of energy-saving circuit, including detection circuit, amplifying circuit and output circuit, the detection circuit connection amplification electricity Road, the amplifying circuit are powered by VCC power supplys and connect the third foot of clamp diode, the first foot of the clamp diode and Crus secunda is grounded and connects respectively output circuit.

Further, the detection circuit is connect by capacitance one with the amplifying circuit, detection circuit one end connection sound Frequency signal AUDIO_ L and AUDIO_R, the other end are coupled by capacitance one with amplifying circuit.

Further, the amplifying circuit includes the first transistor and second transistor；

The base stage of the first transistor is connect with capacitance one, and collector is connect by resistance with VCC power supplys, and emitter leads to Cross resistance eutral grounding；

The base stage of the second transistor and the collector of the first transistor connect, and collector passes through resistance and VCC power supplys Connection, emitter can be preferable after being amplified using the first transistor and second transistor two-stage by resistance eutral grounding, amplifying circuit Driving output circuit, but do not limit two-stage amplification, the larger other electron component of amplification factor or use can also be used Equivalent effect circuit.

Further, the base stage of the first transistor is also grounded by capacitance two, and capacitance two can compensate first crystal Pipe, due to audio signal be dynamic alternating signal, when signal is weaker, capacitance two-way overdischarge compensates, when signal compared with Qiang Shi can be that capacitance two charges.

Further, the output circuit includes capacitance four and third transistor；

The base stage of the third transistor is connect with the crus secunda of the clamp diode, collector connection ERP_DET, hair Emitter grounding.When third transistor is connected, ERP_DET is grounded to form access, and postorder circuit normal work is beaten similar to switch It opens, when third transistor is ended, ERP_DET forms open circuit with ground, is closed similar to switch；

The capacitance four is tunable capacitor, and four anode of capacitance is connect with the crus secunda of the clamp diode, cathode Ground connection.

Further, capacitance three is in series between the amplifying circuit and clamp diode.Capacitance three can prevent direct current Electricity, and then when ensuring no audio signal, third transistor cut-off.

The utility model beneficial effect：When detection circuit long-time（Such as 20 minutes）It is energy saving when detecting not audio signal Circuit can be automatically controlled into standby mode, so as to fulfill energy saving.

Description of the drawings

Fig. 1：A kind of circuit diagram of energy-saving circuit.

Specific embodiment

The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out Clearly and completely describe.

Referring to Fig. 1, in the utility model embodiment, a kind of energy-saving circuit, including detection circuit 1, amplifying circuit 2 and defeated Go out circuit 4, the detection circuit 1 connects amplifying circuit 2, and the amplifying circuit 2 is powered by VCC power supplys and connects two pole of Q9 clampers The third foot of pipe 3, the first foot and crus secunda of the Q9 clamp diodes 3 are grounded and connect respectively output circuit 4.

Further, the detection circuit 1 is connect by C151 capacitances 1 with the amplifying circuit, detection circuit one end Audio signal AUDIO_ L and AUDIO_R are connected, the other end is coupled by C151 capacitances 1 with amplifying circuit.

Further, the amplifying circuit includes Q3 the first transistors 21 and Q8 second transistors 22；

The base stage of the Q3 the first transistors 21 is connect with C151 capacitances 1, and collector is connected by resistance and VCC power supplys It connects, emitter passes through resistance eutral grounding；

The base stage of the Q8 second transistors 22 is connect with the collector of Q3 the first transistors 21, collector by resistance with VCC power supplys connect, and emitter uses 22 two-stage of Q3 the first transistors 21 and Q8 second transistors by resistance eutral grounding, amplifying circuit It can preferably drive output circuit after amplification, but not limit two-stage amplification, larger other of amplification factor can also be used Electronic component uses equivalent effect circuit.

Further, the base stage of the Q3 the first transistors 21 is also grounded by C174 capacitances two, and C174 capacitances two can To compensate Q3 the first transistors 21, since audio signal is dynamic alternating signal, when signal is weaker, C174 capacitances two pass through Electric discharge compensates, and can be that C174 capacitances two charge when signal is stronger.

Further, the output circuit includes C175 capacitances 4 41 and Q10 third transistor 42；

The base stage of the Q10 third transistor 42 is connect with the crus secunda of the Q9 clamp diodes 3, collector connection ERP_DET, emitter ground connection.When Q10 third transistor 42 is connected, ERP_DET is grounded to form access, the normal work of postorder circuit Make, opened similar to switch, when Q10 third transistor 42 is ended, ERP_DET forms open circuit with ground, is closed similar to switch；

The C175 capacitances 4 41 are tunable capacitor, 4 41 anode of C175 capacitances and the Q9 clamp diodes 3 Crus secunda connects, cathode ground connection, adjustment C175 capacitances 4 41, can adjust the detection time of no audio signal, example, if automatically The standby stand-by period is 15 minutes, then when C175 capacitances 4 41 are tuned up, the automatic stand-by stand-by period can be more than 15 minutes, on the contrary It is as the same.

Further, C169 capacitances three are in series between the amplifying circuit 2 and Q9 clamp diodes 3.C169 capacitances three When can prevent direct current, and then ensure no audio signal, Q10 third transistor 42 is ended.

The utility model beneficial effect：When detection circuit long-time（Such as 20 minutes）It is energy saving when detecting not audio signal Circuit can be automatically controlled into standby mode, so as to fulfill energy saving.

When will detect audio signal, audio signal is amplified by Q3 the first transistors 21 and 22 two-stage of Q8 second transistors Afterwards, by the rectification of C169 capacitances three and Q9 clamp diodes 3, become direct current signal, and Q10 third transistor 42 is driven to lead It is logical；

During by can't detect audio signal for a long time, Q3 the first transistors 21 end, Q8 second transistors 22 are connected, and make VCC power supplys are close to zero, meanwhile, three further isolated DC signal of C169 capacitances, Q10 third transistor 42 is ended, so as to real Existing automatic stand-by.

ERP_DET is ERP Detection circuit（ERP detection circuits）Write a Chinese character in simplified form, be in the meaning of this patent：Inspection Survey the circuit detection control point for whether entering standby mode.

It is obvious to a person skilled in the art that the utility model is not limited to the details of foregoing example embodiment, and It is enough to realize that this practicality is new in other specific forms and in the case of the spirit or essential attributes without departing substantially from the utility model Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this practicality is new The range of type is limited by appended claims rather than preceding description, it is intended that by containing in the equivalent requirements of the claims is fallen All changes in justice and range are embraced therein.Any reference numeral in claim should not be considered as limitation Involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in each embodiment can also be properly combined, forms those skilled in the art The other embodiment being appreciated that.

Claims (6)

1. a kind of energy-saving circuit, including detection circuit, amplifying circuit and output circuit, it is characterised in that：The detection circuit connects Amplifying circuit is connect, the amplifying circuit is powered by VCC power supplys and connects the third foot of clamp diode, the clamp diode First foot and crus secunda are grounded and connect respectively output circuit.

2. a kind of energy-saving circuit according to claim 1, it is characterised in that：The detection circuit by capacitance one with it is described Amplifying circuit connects.

3. a kind of energy-saving circuit according to claim 1, it is characterised in that：The amplifying circuit include the first transistor and Second transistor；

The base stage of the first transistor is connect with capacitance one, and collector is connect by resistance with VCC power supplys, and emitter passes through electricity Resistance ground connection；

The base stage of the second transistor and the collector of the first transistor connect, and collector is connect by resistance with VCC power supplys, Emitter passes through resistance eutral grounding.

4. a kind of energy-saving circuit according to claim 3, it is characterised in that：The base stage of the first transistor also passes through electricity Hold two ground connection.

5. a kind of energy-saving circuit according to claim 1, it is characterised in that：The output circuit includes capacitance four and third Transistor；

The base stage of the third transistor is connect with the crus secunda of the clamp diode, collector connection ERP_DET, emitter Ground connection；

The capacitance four is tunable capacitor, and four anode of capacitance is connect with the crus secunda of the clamp diode, cathode ground connection.

6. a kind of energy-saving circuit according to claim 1, it is characterised in that：Between the amplifying circuit and clamp diode It is in series with capacitance three.