CN201830322U

CN201830322U - High-volume mobile phone

Info

Publication number: CN201830322U
Application number: CN2010205874080U
Authority: CN
Inventors: 杨哲明; 丘力科
Original assignee: Primatronix Nanho Electronics Ltd
Current assignee: Primatronix Nanho Electronics Ltd
Priority date: 2010-11-02
Filing date: 2010-11-02
Publication date: 2011-05-11
Anticipated expiration: 2020-11-02

Abstract

The utility model discloses a high-volume mobile phone comprising a mobile phone chip, a power amplifying circuit, a receiver circuit, an audio output circuit and an output end simulating signal switch, wherein an audio signal port of the mobile phone chip is electrically connected with an input end of the power amplifying circuit, and a voice signal port is electrically connected with an input end of the receiver circuit; the output end simulating signal switch consists of an input channel and a first and a second output channels that can be communicated with the input channel in a time-sharing manner; an output end of the power amplifying circuit is electrically connected with the input channel of the output end simulating signal switch, an input end of the audio output circuit is eclectically connected with the first output channel, and the input end of the receiver circuit is electrically connected with the second output channel; and an audio differential signal can be output by the voice signal port or the audio signal port. Under the limited volume of the mobile phone, the amplifying of the voice differential signal can be realized, and the amplified voice can be played out through a receiver, therefore, the whistle generated under the action of feedback signals of a microphone circuit can not exist.

Description

A kind of louder volume mobile phone

Technical field

The utility model relates to field of mobile phones, relates in particular to the louder volume mobile phone that a kind of suitable old man uses.

Background technology

The mobile phone that designs for the old man is to realize enlarge font on the basis of conventional mobile phone basically in the market, increases functions such as screen font demonstration and increase volume.In conventional mobile phone, the audio signal of its chip for cell phone output mainly is the MP3 audio frequency, exports horn circuit to through power amplification circuit, and the voice signal and the audio signal of chip for cell phone output are obstructed, and it is directly inputted into the telephone receiver circuit.

It mainly is suitably to regulate by the adjustable resistance that is provided with in the telephone receiver circuit that present receipts speech amount is regulated, but its adjustable range is limited, the mobile phone that designs for the old man can be transformed into voice signal and carry out outer putting in the horn circuit, as publication number is that the Chinese patent application of CN 101217578A discloses a kind of mobile telephone special designed for old people, promptly is the further amplification that realizes volume by the dialogue sound that loudspeaker plays is amplified.But this volume mode of amplifying can't realize the 40dB volume basically and amplify, because in communication process, chip for cell phone can not be closed microphone circuit, it is usually said microphone circuit, therefore, will produce the serious phenomenon of uttering long and high-pitched sounds owing to the feedback effect of microphone circuit when the loudspeaker volume reaches 40db, this can influence speech quality to a great extent.So existing the elderly's mobile phone is all less than fundamentally solving the problem that the speech amount is amplified of receiving.

The utility model content

The purpose of this utility model is in order to address the above problem, a kind of louder volume mobile phone of exportable at least 40db volume to be provided.

The technical solution adopted in the utility model is: a kind of louder volume mobile phone comprises chip for cell phone, power amplification circuit, telephone receiver circuit and audio output circuit; The voice signal port of the output voice differential signal of described chip for cell phone is electrically connected with the input of telephone receiver circuit; Described louder volume mobile phone also comprises output analog signal switch, first and second output channels that described output analog signal switch comprises input channel and can be communicated with the input channel timesharing under the control of chip for cell phone; The output of described power amplification circuit is electrically connected with the input channel of output analog signal switch, and the input of described audio output circuit is electrically connected with first output channel, and the input of described telephone receiver circuit is electrically connected with second output channel; The output audio differential signal of described chip for cell phone or the audio signal port of voice differential signal are electrically connected with the input of power amplification circuit.

A kind of louder volume mobile phone comprises chip for cell phone, power amplification circuit, telephone receiver circuit and audio output circuit; The audio signal port of the output audio differential signal of described chip for cell phone is electrically connected with the input of power amplification circuit; Described louder volume mobile phone also comprises input analog signal switch and output analog signal switch;

First and second output channels that described input analog signal switch comprises input channel and can be communicated with the input channel timesharing of input analog signal switch under the control of chip for cell phone, the voice signal port of the output voice differential signal of described chip for cell phone is electrically connected with the input channel of input analog signal switch, first output channel of described input analog signal switch is electrically connected with the input of telephone receiver circuit, and second output channel of described input analog signal switch is electrically connected with the input of power amplification circuit;

First and second output channels that described output analog signal switch comprises input channel and can be communicated with the input channel timesharing of output analog signal switch under the control of chip for cell phone; The output of described power amplification circuit is electrically connected with the input channel of output analog signal switch, the input of described audio output circuit is electrically connected with first output channel of output analog signal switch, and the input of described telephone receiver circuit is electrically connected with second output channel of output analog signal switch.

The beneficial effects of the utility model are: under the limited volume of mobile phone, realize the amplification of voice differential signals (being mainly conversation signal), and the telephone receiver that passes through the telephone receiver circuit broadcasts the voice that amplify, like this, produce with regard to not being subjected to the effect of microphone circuit feedback signal and to utter long and high-pitched sounds, therefore, louder volume mobile phone of the present utility model and suitable old man thereof use.

Description of drawings

Fig. 1 is the frame principle figure of the utility model louder volume mobile phone;

Fig. 2 shows the part signal and the part signal that inputs in the chip for cell phone of chip for cell phone output among Fig. 1;

Fig. 3 shows power amplification circuit among Fig. 1;

Fig. 4 shows output analog signal switch among Fig. 1;

Fig. 5 shows the telephone receiver circuit that louder volume mobile phone of the present utility model is used;

Fig. 6 shows the audio output circuit that louder volume mobile phone of the present utility model is used.

Embodiment

As shown in Figure 1, louder volume mobile phone of the present utility model comprises chip for cell phone U1, the model of selecting for use in the present embodiment is MT6223, power amplification circuit, output analog signal switch U3, telephone receiver circuit and audio output circuit, wherein, the terminal output device of telephone receiver circuit is telephone receiver RE1, i.e. receiver, and the terminal output device of audio output circuit is loudspeaker SPK4.Chip for cell phone U1 is by its voice signal port VOICE_OUT output voice differential signal, by its audio signal port MP3_OUT output audio differential signal, under common talking state, the voice differential signal is directly inputted into telephone receiver circuit shown in Figure 5, exports corresponding voice by telephone receiver RE1; Under the state of earphone of not pegging graft, the audio frequency differential signal is handled by the audio output circuit that power amplification circuit shown in Figure 3 inputs to as shown in Figure 6, finally export corresponding audio frequency through loudspeaker SPK4, be mainly MP3, in this explanation, under the control of chip for cell phone U1, do not have signal and input to telephone receiver circuit and audio output circuit simultaneously, to avoid occurring the audio mixing phenomenon, usually, the priority of voice signal is higher than the priority of audio signal, promptly in communication process, chip for cell phone U1 can cut off the output of audio signal, and recovers the output of audio signal behind end of conversation.

In the utility model, by an output analog signal switch U3, can amplify the voice differential signal by the power amplification circuit that audio signal is amplified, and the voice amplified difference signal through amplifying inputed to the telephone receiver circuit, can realize the volume output of 40db at least like this, and can not occur uttering long and high-pitched sounds, because microphone circuit can recognize the voice by telephone receiver RE1 output hardly.

As shown in Figure 2, the voice signal port VOICE_OUT of chip for cell phone U1 comprises the first voice signal port AU_OUT0_N and the second voice signal port AU_OUT0_P, and the first voice signal SPKN0 and the second voice signal SPKP0 by the output of the first and second voice signal ports forms described voice differential signal respectively.The audio signal port MP3_OUT of chip for cell phone U1 comprises left channel audio signal port AU_MOUTL and right channel audio signal port AU_MOUTR, right channel audio signal and zero voltage signal (ground connection) by the output of right channel audio signal port, perhaps right channel audio signal and the left channel audio signal of exporting by R channel and left channel audio signal port respectively forms described audio frequency differential signal, generally speaking, audio signal by loudspeaker output is the former or the latter, and the audio signal of exporting by earphone is the latter.

As shown in Figure 4, this output analog signal switch U3 comprises two single-pole double-throw switch (SPDT)s, through the first amplifying signal VO+ of the difference amplifying signal of power amplification circuit output and first input end mouth COM1 that the second amplifying signal VO-inputs to first single-pole double-throw switch (SPDT) respectively and the second input port COM2 of second single-pole double-throw switch (SPDT).In the present embodiment, export the first audio amplification signal SPKP and the second audio amplification signal SPKN by first audio output port NO1 of first single-pole double-throw switch (SPDT) and the second audio output port NO2 of second single-pole double-throw switch (SPDT) respectively, the audio frequency amplified difference signal that this first audio amplification signal SPKP and the second audio amplification signal SPKN form inputs in as shown in Figure 6 the audio output circuit, and exports through loudspeaker SPK4; In addition, export the first voice amplifying signal RECP and the second voice amplifying signal RECN by first voice output port IN1 of first single-pole double-throw switch (SPDT) and the second voice output port IN2 of second single-pole double-throw switch (SPDT) respectively, the voice amplified difference signal that these first voice amplifying signal RECP and the second voice amplifying signal RECN form inputs in as shown in Figure 5 the telephone receiver circuit, and exports through telephone receiver RE1.The switch controlling signal GPIO20 of the switch enable port BPI_BUS6/GPIO20 output of chip for cell phone U1 inputs to first control end NC1 of first single-pole double-throw switch (SPDT) and the second control end NC2 of second single-pole double-throw switch (SPDT), to control the synchronous conducting of first and second single-pole double-throw switch (SPDT)s or to switch synchronously.As from the foregoing, this first input end mouth COM1 and the second input port COM2 form the input channel of output analog signal switch U3; First audio output port NO1 of first single-pole double-throw switch (SPDT) and the second audio output port NO2 of second single-pole double-throw switch (SPDT) are as first output channel of output analog signal switch U3; The second voice output port IN2 of the first voice output port IN1 of first single-pole double-throw switch (SPDT) and second single-pole double-throw switch (SPDT) is as second output channel of output analog signal switch U3.

Voltage VBAT inputs to the operating voltage input port of this output analog signal switch U3 through inductance L 413, and in addition, this operating voltage input VCC is through the parallel circuits ground connection of capacitor C 432 and C431.

In the present embodiment, the corresponding electrical connection of differential input end of left channel audio signal port AU_MOUTL and right channel audio signal port AU_MOUTR and power amplification circuit.

The differential input end of power amplification circuit is imported the audio frequency differential signal in the normal state, output analog signal switch U3 connects the first input end mouth COM1 and the first audio output port NO1 of first single-pole double-throw switch (SPDT) under the effect of switch controlling signal GPIO20, and the second input port COM2 of second single-pole double-throw switch (SPDT) and the second audio output port NO2, promptly by loudspeaker SPK4 output

In addition, as shown in Figure 3, in the present embodiment, by loudspeaker audio plays differential signal the time, chip for cell phone U1 can select not export left channel audio signal AU_MOUTL, forms this audio frequency differential signal between right channel audio signal AU_MOUTR and the zero voltage signal and make.When the user triggers louder volume output key SW1, chip for cell phone U1 with the voice differential signal by the channel switching that inputs to the telephone receiver circuit to the passage of the differential input end that inputs to power amplification circuit, at this, can make the voice differential signal by default program by chip for cell phone U1, the i.e. first voice signal SPKN0 and the second voice signal SPKP0, respectively by right channel audio signal port AU_MOUTR and left channel audio signal port AU_MOUTL output, perhaps realize being directly inputted into switching between telephone receiver circuit and the power amplification circuit by an input analog signal switch with two single-pole double-throw switch (SPDT)s, the input channel that promptly realizes input analog signal switch is communicated with the switching between its first output channel or second output channel.Meanwhile, output analog signal switch U3 connects the first input end mouth COM1 and the first voice output port IN1 of first single-pole double-throw switch (SPDT) under the effect of switch controlling signal GPIO20, and the second input port COM2 of second single-pole double-throw switch (SPDT) and the second voice output port IN2, promptly export by telephone receiver.

In the present embodiment, this telephone receiver circuit adopts circuit structure as shown in Figure 5, its input comprises that first and second receive the words differential input end, this first receipts words differential input end is electrically connected through the first input end of inductance L 406 with telephone receiver RE1, this second receipts words differential input end is electrically connected with second input of telephone receiver RE1 through inductance L 407, wherein, be electrically connected with capacitor C 421 between the first and second receipts words differential input ends; Potential point between capacitor C 421 and the inductance L 406 is through capacitor C 423 ground connection, and the potential point between capacitor C 421 and the inductance L 407 is through capacitor C 422 ground connection; The first input end of telephone receiver RE1 is through the parallel circuits ground connection of capacitor C 426 and rheostat T406, and second input of telephone receiver RE1 is through the parallel circuits ground connection of capacitor C 428 with rheostat T404; Be electrically connected with capacitor C 427 between the first input end of telephone receiver RE1 and second input.The first voice signal port AU_OUT0_N of chip for cell phone U1 and the second voice signal port AU_OUT0_P receive words differential input end and second with first of telephone receiver circuit respectively and receive the words differential input end and is electrically connected, and the first voice output port IN1 of the second voice output port IN2 of second single-pole double-throw switch (SPDT) and first single-pole double-throw switch (SPDT) also receives words differential input end and second with first of telephone receiver circuit respectively and receives and talk about differential input end and be electrically connected.

In the present embodiment, this audio output circuit adopts circuit structure as shown in Figure 6, its input comprises that first and second play input, this first broadcast input is electrically connected through the first input end of inductance L 404 with loudspeaker SPK4, and this second broadcast input is electrically connected with second input of loudspeaker SPK4 through inductance L 403; The first input end of loudspeaker SPK4 is through capacitor C 425 ground connection, and second input is through capacitor C 417 ground connection.Second audio output port NO2 of second single-pole double-throw switch (SPDT) and the first audio output port NO1 of first single-pole double-throw switch (SPDT) are electrically connected with first and second inputs of loudspeaker SPK4 respectively.

In the present embodiment, power amplification circuit adopts circuit structure as shown in Figure 3, it comprises power amplification chip U2, the close port SHUTDOWN of power amplification chip U2 is electrically connected with the amplification enable port SRCLKENAI/GPI031_23 of chip for cell phone U1, make it be controlled by the amplification control signal GPI031 of chip for cell phone U1 output, this close port SHUTDOWN is through pull down resistor R408 ground connection.Under the situation when chip for cell phone passes through the input channel of program converting speech differential signal, positive input port+IN of this power amplification chip U2 forms the positive input terminal of power amplification circuit in turn through inductance L 408, resistance R 420 and capacitor C 413, negative input end mouth-IN of power amplification chip U2 forms first negative input end of power amplification circuit in turn through inductance L 409, resistance R 410 and capacitor C 411, the positive input terminal of power amplification circuit and first negative input end form described differential input end; Positive input port+IN and negative input end mouth-IN are respectively by capacitor C 441 and capacitor C 437 ground connection; Bypass ports BYPASS is through capacitor C 424 ground connection, and is electrically connected with positive input port+IN through resistance R 444; The first output port VO1 of power amplification chip U2 exports the described first amplifying signal VO+ as first output of power amplification circuit through resistance R 423, and the second output port VO2 exports the described second amplifying signal VO-as second output of power amplification circuit through resistance R 422; The first output port VO1 is electrically connected with negative input end mouth-IN through the parallel circuits of resistance R 442 and capacitor C 436; The direct ground connection of ground port GND, operating voltage input port VDD input voltage VBAT is electrically connected with capacitor C 416 between operating voltage input port VDD and the ground.

In addition, when adopting the input channel of input analog signal switch transition voice differential signal, negative input end mouth-IN of power amplification chip U2 forms second negative input end of power amplification circuit in turn through inductance L 409, resistance R 421 and capacitor C 433, at this, the first voice signal port AU_OUT0_N of chip for cell phone U1 and the second voice signal port AU_OUT0_P are through the input corresponding electrical connection of this input analog signal switch with the differential input end and the telephone receiver circuit of power amplification circuit.The positive input terminal of power amplification circuit and second negative input end form another input.

As shown in Figure 1, louder volume mobile phone of the present utility model also comprises the GPS module U6 that is connected with gps antenna ANT, the transmit port TX of this chip for cell phone U1 sends Location Request to the receiving port GPS_RX of GPS module U6, and the transmit port GPS_TX of GPS module U6 sends locator data to the receiving port RX of chip for cell phone U1.This chip for cell phone U1 provides stable 3V voltage by pressurizer U5 for GPS module U6.Can be the old man by this GPS module U6 positional information is provided.

Moreover louder volume mobile phone of the present utility model has a key dial feature of existing mobile phone and emergent dial feature etc. equally, but also can dispose earphone interface circuit etc.

Being the utility model preferred embodiment only in sum, is not to be used for limiting practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all should belong to technology category of the present utility model.

Claims

1. a louder volume mobile phone comprises chip for cell phone, power amplification circuit, telephone receiver circuit and audio output circuit; The voice signal port of the output voice differential signal of described chip for cell phone is electrically connected with the input of telephone receiver circuit; It is characterized in that: described louder volume mobile phone also comprises output analog signal switch, first and second output channels that described output analog signal switch comprises input channel and can be communicated with the input channel timesharing under the control of chip for cell phone; The output of described power amplification circuit is electrically connected with the input channel of output analog signal switch, and the input of described audio output circuit is electrically connected with first output channel, and the input of described telephone receiver circuit is electrically connected with second output channel; The output audio differential signal of described chip for cell phone or the audio signal port of voice differential signal are electrically connected with the input of power amplification circuit.

2. a louder volume mobile phone comprises chip for cell phone, power amplification circuit, telephone receiver circuit and audio output circuit; The audio signal port of the output audio differential signal of described chip for cell phone is electrically connected with the input of power amplification circuit; It is characterized in that: described louder volume mobile phone also comprises input analog signal switch and output analog signal switch;