CN2379976Y

CN2379976Y - Means for controlling sound volume of mobile telephone set

Info

Publication number: CN2379976Y
Application number: CN 99216534
Authority: CN
Inventors: 栾鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-07-09
Filing date: 1999-07-09
Publication date: 2000-05-24
Anticipated expiration: 2009-07-09

Abstract

The utility model relates to a means for controlling sound volume of mobile telephone set, comprising an induced circuit. The circuit is connected to an internal power supply circuit, then to a power amplification circuit and a loudspeaker; a checking and controlling circuit is connected between an induction controlling circuit and the internal power supply circuit. The mobile phone with the utility model can control efficiently the current work of the internal power supply when checking into telephone signals, to control the work of the sound volume. A call ended, the power amplification circuit returns to work, which ensures that the call is not disturbed. The means is good in shock resistance, easy in usage and very suitable for automobiles.

Description

The device of mobile phone control sound equipment power amplifier

The utility model relates to a kind of mobile phone control device, particularly relates to a kind of device of mobile phone control sound equipment power amplifier.

The mobile phone of Shi Yonging is not controlled the function of sound equipment in the market, therefore when personal handyphone when throwing into or get phone, can not quit work automatically, make personal handyphone be interfered when receiving phone, use personal handyphone to feel very inconvenient like this.

The purpose of this utility model is to overcome above-mentioned shortcoming, and a kind of device of mobile phone control sound equipment power amplifier is provided.

Control principle of the present utility model is, as shown in Figure 1, when personal handyphone and communication network conversation, near personal handyphone, will have very strong electromagnetic field, consequent electromagnetic wave signal, by the reception to this electromagnetic wave signal, control and processing and amplifying are come the power supply trigger end of control power amplifiers.Just often, trigger end is connected, and when personal handyphone received telephone signal, its inductive control circuit bypassed triggering signal S ripple conducting, i.e. triggering signal S short circuit over the ground.This machine interior power supply circuit quits work, and makes power amplifier non-transformer voltage and quits work.Behind end of conversation, inductive control circuit ends, and it is normal that triggering signal S recovers, the amplifier power supply circuit working, thereby power amplification circuit is resumed work, loud speaker is emitted sound.

The utility model is realized by following proposal.

The device of the utility model mobile phone control sound equipment power amplifier, comprise inductive control circuit, this circuit is connected to interior power supply circuit, is connected to power amplification circuit and loud speaker, is connected with the detection control circuit between inductive control circuit and interior power supply circuit.

The device of the utility model mobile phone control sound equipment power amplifier, wherein detect control circuit and comprise transistor Q3, this emitter is by voltage-stabiliser tube ZD1, and resistance R 13 is connected to transistor Q6 base stage, and transistor Q6 collector electrode is connected to transistor Q7 base stage after by resistance R 14, R15 dividing potential drop.

The advantage of the device of the utility model mobile phone control sound equipment power amplifier is: when personal handyphone was thrown into or got phone, this device will quit work automatically, made that the phone that receives is interference-free.When talk-through, this device recovers operate as normal again automatically.This function will make is driving to answer a call convenient, safety.Make when rest is listened to the music and also can not lose any one phone information.

This device has the advantages that high-fidelity is amplified, and dual track input, output make stereophonic effect stronger.High bass input can be given full play to the device amplification meticulousr to audio frequency, allows you enjoy the sensation of fever to the full, the balanced control of high bass, and you can arbitrarily control the size of left and right acoustic channels volume.Volume adjusting function with making you no longer be subjected to the restriction of volume, chooses suitable volume, and you control volume more convenient.Supper bass is selected to allow you understand the shaking power of music.Strong shock resistance can guarantee that this device can be not impaired because of concussion, and therefore, this device is fit to use on the automobile very much.

This device uses DV12V, operating voltage ± 15V, power output 120W, output impedance 4～8 Ω.

Further specify the course of work of the mobile phone control sound equipment power amplification device of this device below in conjunction with accompanying drawing.

Fig. 1 is the schematic diagram of the device of mobile phone control sound equipment power amplifier of the present utility model.

Fig. 2 is the manipulated or operated apparatus of mobile phone control sound equipment power amplifier of the present utility model.

AN is a reception antenna among Fig. 1, and S is a triggering signal, and Y is a loud speaker.Operation principle among Fig. 1 is narrated in front, no longer repeats at this.

Among Fig. 2, automobile storage battery+12V power supply is through key power control terminal (with circuit working after the positive pole connection).After the energized, power supply adds to capacitor C 7 by resistance R 10, and about 2 times in second, the C7 both end voltage rises to about 6.2V, and this voltage is through voltage-stabiliser tube ZD1, and resistance R 13 adds to transistor Q6 base stage, and the Q6 base stage obtains bias voltage, Q6 conducting.Through resistance R 14 and R15 dividing potential drop, transistor Q7 base stage obtains 10V left and right sides bias voltage, so the Q7 conducting, operating voltage is provided for ic chip 1, TL494, make TL494 work, output high frequency arteries and veins spare signal is through Q11, Q12, Q13, Q14 and high frequency transformer T38515, with boost in voltage, knot is fast to recover cloudy altogether, positive diode AKA after the KAK rectification, forms duplicate supply (VDD, VSS) and offers power amplification circuit altogether.

When mobile phone receives phone or externally dials phone and when connecting, around this personal handyphone, will produce very strong electromagnetic field, consequent electromagnetic wave signal, by reception to this electromagnetic wave signal, control and processing and amplifying, feasible signal after treatment can be finished the control to power circuit, and its control procedure is as follows:

AV is the local signal reception antenna, AN receives stronger electromagnetic wave, after diode D2 detection, be input to by transistor Q1 through capacitor C 4, Q2 and respective element R3 thereof, R4, C5, R5, the Q1 base stage of the inductive control circuit that R7 forms is amplified, signal after the amplification is coupled to transistor Q2 base stage (Q2 is a cut-off state) through capacitor C 5 when the C5 no signal is imported, make the Q2 conducting, after the Q2 conducting, make by transistor Q3, Q4, Q5, Q6, Q7 and R10, C7, R11, R12, ZD1, R13, R14, the base stage of the Q3 of the detection control circuit that R15 forms, the Q3 base voltage is descended, Q3 becomes conducting by ending, capacitor C 7 both end voltage descend rapidly, thereby cause transistor Q6 base voltage to descend rapidly, Q6 is become by conducting to be ended, this moment, resistance R 14 no currents passed through, the last no pressure drop of R14, make transistor Q7 base voltage rise to 12V, Q7 becomes and ends, so integrated package TL494 non-transformer voltage, and quit work, thereby cause Q11, Q12, Q13, the interior power supply circuit that Q14 and high frequency transformer T38515 form quits work no-output voltage VDD, VSS.Power amplification circuit loses power supply and quits work, thereby has realized the function of personal handyphone power amplification circuit automatic mute when calling or dial phone and conversation.Talk-through, because of losing stronger electromagnetic wave at antenna AN place, transistor Q2 ends, and it is normal that circuit thereafter recovers, the multiple operate as normal of power amplification circuit mobile phone.

The circuit and the function of this mobile phone control sound equipment power amplifier design voluntarily, develop, succeed in developing.At present, the effect that does not also have this function at home and abroad.Once put promise well on market, market potential is very big.

Claims

1, a kind of device of mobile phone control sound equipment power amplifier, comprise sensor circuit, this circuit is connected to interior power supply circuit, is connected to power amplification circuit and loud speaker, it is characterized in that, between inductive control circuit and interior power supply circuit, be connected with the detection control circuit.

2, the device of mobile phone control sound equipment power amplifier according to claim 1, it is characterized in that: detect control circuit and comprise transistor Q3, this emitter is by voltage-stabiliser tube ZD1, resistance R 13 is connected to transistor Q6 radix, and transistor Q6 collector electrode is connected to transistor Q7 base stage after by resistance R 14, R15 dividing potential drop.