CN201928423U - Volume controlling device - Google Patents
Volume controlling device Download PDFInfo
- Publication number
- CN201928423U CN201928423U CN2010202638457U CN201020263845U CN201928423U CN 201928423 U CN201928423 U CN 201928423U CN 2010202638457 U CN2010202638457 U CN 2010202638457U CN 201020263845 U CN201020263845 U CN 201020263845U CN 201928423 U CN201928423 U CN 201928423U
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- volume control
- volume
- triode
- electric capacity
- signal
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Abstract
A volume controlling device comprises a single key, a key signal identification circuit, an electronic volume control unit and a power amplifier unit, wherein the single key can be used for executing the continuous pressing operation or transient pressing operation; the key signal identification circuit is used for identifying the types of the pressing operation executed by the single key, generating a corresponding volume control signal and outputting the volume control signal to the electronic volume control unit; and the electronic volume control unit and the power amplifier unit are connected to a loudspeaker unit. Further, the key signal identification circuit comprises a differential circuit, a driving triode Q1, an integrating circuit and a triode Q2; a collector electrode of the Q1 outputs a volume increasing signal; and a collector electrode of the Q2 outputs a volume decreasing signal. According to the device disclosed by the utility model, the volume can decrease or increase through continuously or transiently pressing the single key by a user.
Description
Technical field
The present invention relates to a kind of sound volume control device, relate in particular to an a kind of available button and realize the device that volume increases and reduces.
Background technology
Along with the raising of people's living standard, multimedia equipment is more and more universal.Huge numbers of families have been entered into as portable equipments such as television set, DVD, MP3, MID.These equipment all can relate to the control of volume, and usually in equipment, the control of volume mainly realizes in the following manner: 1, utilize mechanical potentiometer, the rotation by knob realizes the increase of volume or reduces; 2, the automatic identification control state of single-chip microcomputer is realized the increase of volume or is reduced by the electronic sound volume control unit; 3, by volume "+" or volume "-" by key control electronic sound volume control unit, realize the increase of volume or reduce.
At present, the consumer is more and more higher to the requirement of multimedia equipment, is convenient for carrying in order to make equipment, requires its volume littler, and weight is lighter, and structure is simpler, operates more humane.More than first kind of mode when realizing volume control, may bring the increase of equipment volume and the increase of weight, the second way tends to increase the design cost of equipment or circuit is complicated, and the third mode is low because of its cost, often be not designed the person and adopt, yet two buttons have occupied equipment larger area available action interface inevitably.
Summary of the invention
In order to address the above problem, the present invention proposes a kind of sound volume control device, can realize the increase and the minimizing of volume by a button.
The inventive system comprises the individual palpation key, can be used to carry out lasting button operation or of short duration button operation; A push button signalling identification circuit is used to discern the kind of the button operation that described individual palpation key carries out, and produces corresponding volume control signal, exports to the electronic sound volume control unit; Electronic sound volume control unit and power amplifier unit are connected to loudspeaker unit.
Further, described push button signalling identification circuit comprises: differential circuit, first drives triode, integrating circuit and second drives triode; Described first second collector electrode that drives triode that drives triode is exported first signal and secondary signal respectively.
Further, described differential circuit comprises first electric capacity and first resistance, and described first base stage that drives triode is connected between first electric capacity and first resistance.
Further, described integrating circuit comprises second resistance and second electric capacity, is connected two diodes between the base stage of described second electric capacity and the second driving triode; Be connected a diode between the collector electrode of described second electric capacity and the described first driving triode, described second resistance diode in parallel.
According to device of the present invention, the user only needs to continue push to described individual palpation key, and perhaps of short duration push can be realized reducing or increasing of volume.
Other features and advantages of the present invention will be set forth in the following description, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure and method in the specification of being write, claims and accompanying drawing.
Introduce preferred embodiment below in conjunction with accompanying drawing, the device that the present invention is proposed is described in detail.Should be noted that the purpose of accompanying drawing just is convenient to the explanation to the specific embodiment of the invention, is not a kind of unnecessary narration or limitation of the scope of the invention.
Description of drawings
Fig. 1 is the structure principle chart of apparatus of the present invention.
Fig. 2 is the circuit connection diagram of push button signalling identification circuit in apparatus of the present invention.
The sequential chart of push button signalling and output volume control signal when Fig. 3 works for apparatus of the present invention.
Embodiment
As shown in Figure 1, the inventive system comprises an individual palpation key AN who regulates volume, the A termination VCC of AN, the B end connects the push button signalling identification circuit.Push button signalling identification circuit output two-way volume control signal OUT1 and OUT2 give the electronic sound volume control unit, and connect power amplifier unit and loudspeaker unit.
Be the circuit connection diagram of push button signalling identification circuit in apparatus of the present invention as described in Figure 2.
The B of AN holds by ground connection behind the connection discharge resistance R3, and simultaneously, the B of AN end is by connection capacitor C 1 and resistance R 1 ground connection, and the base stage of triode Q1 is connected between C1 and the R1.The emitting stage ground connection of Q1, the collector electrode output volume increases signal OUT1.
The B end of AN is by connecting resistance R 2 and capacitor C 2 back ground connection.D1 is in parallel with R2.After C2 connects the positive pole of diode D2, be connected to the collector electrode of Q1.Simultaneously, after C2 connects the positive pole of diode D3 and D4 successively, be connected to the base stage of triode Q2.The grounded emitter of Q2, the collector electrode output volume reduces signal OUT2.
Sequential chart when being illustrated in figure 3 as apparatus of the present invention work.In the present embodiment, we to define the output signal low level effective.The time that T is pressed for button AN; At T0 constantly, AN is pressed; T0～T1, Q1 is in conducting state, T1=f (R1, C1); At T2 constantly, Q2 is switched on, and T2=f (R2, C2).
1, when T1＜T＜T2, be that volume increases process:
Step 11, in the T0 moment, AN is pressed;
Step 12, C1 is recharged and produces high level pulse, Q1 conducting, OUT1 output low level;
Step 13, in the T1 moment, high level pulse finishes, and Q1 ends, and the OUT1 upset is high level, and volume is finished once to be increased;
Step 14, elapsed time T, AN is upspring, and C1 discharges by R3, restPoses, to prepare to receive pulse signal next time.
2, when T＞T2, be the little process of volume down:
Step 21, in the T0 moment, AN is pressed, repeating step 11～step 13, C2 is by slowly charging (C2 and R2 are bigger) simultaneously;
Step 22, in the T2 moment, C2 is charged to and makes the C terminal voltage surpass 1.4V (according to D3, D4, Q2 type difference, conducting voltage changes to some extent), D3, D4 and Q2 conducting, OUT2 is output as low level, and promptly volume reduces.
Step 23, elapsed time T, AN is upspring, and C2 is by D1 and R3 discharge, and C1 discharges by R3, to restPose.
Need to prove: the time T that is pressed as AN is during less than T2, because C2 and R2 are bigger, the C2 charging interval is slower, and Q2 is in cut-off state always, and OUT2 is output as high level, and therefore, the volume down small-signal can not be triggered.
By above execution mode, we have realized controlling the increase of volume and reducing with singly-bound.Utilize device of the present invention, can reduce the multimedia equipment volume, effectively utilize panel space, make design more humane.The above only is a preferred implementation of the present invention; but not to be the limitation of the scope of the invention should be understood that for they; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, some improvements and modifications of having done also should be considered as within protection scope of the present invention.
Claims (4)
1. a sound volume control device comprises electronic sound volume control unit and power amplifier unit, is connected to loudspeaker unit, it is characterized in that, also comprises:
The individual palpation key can be used to carry out lasting button operation or of short duration button operation;
A push button signalling identification circuit is used to discern the kind of the button operation that described individual palpation key carries out, and produces corresponding volume control signal, exports to the electronic sound volume control unit.
2. device according to claim 1 is characterized in that, described push button signalling identification circuit comprises:
Differential circuit, first drives triode, integrating circuit and second drives triode; Described first second collector electrode that drives triode that drives triode is exported first signal and secondary signal respectively.
3. device according to claim 2 is characterized in that, described differential circuit comprises first electric capacity and first resistance, and described first base stage that drives triode is connected between first electric capacity and first resistance.
4. device according to claim 2 is characterized in that, described integrating circuit comprises second resistance and second electric capacity, is connected two diodes between the base stage of described second electric capacity and the second driving triode; Be connected a diode between the collector electrode of described second electric capacity and the described first driving triode, described second resistance diode in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202638457U CN201928423U (en) | 2010-07-20 | 2010-07-20 | Volume controlling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202638457U CN201928423U (en) | 2010-07-20 | 2010-07-20 | Volume controlling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201928423U true CN201928423U (en) | 2011-08-10 |
Family
ID=44432256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202638457U Expired - Lifetime CN201928423U (en) | 2010-07-20 | 2010-07-20 | Volume controlling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201928423U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019144620A1 (en) * | 2018-01-25 | 2019-08-01 | 郑州云海信息技术有限公司 | Novel discharge circuit and method therefor |
-
2010
- 2010-07-20 CN CN2010202638457U patent/CN201928423U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019144620A1 (en) * | 2018-01-25 | 2019-08-01 | 郑州云海信息技术有限公司 | Novel discharge circuit and method therefor |
| US11205949B2 (en) | 2018-01-25 | 2021-12-21 | Zhengzhou Yunhai Information Technology Co., Ltd. | Discharge circuit and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110810 |
|
| CX01 | Expiry of patent term |