CN2413437Y

CN2413437Y - Full-functional earbag receiving stereo transmitting, receving device

Info

Publication number: CN2413437Y
Application number: CN99219028U
Authority: CN
Inventors: 陶成果
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-08-09
Filing date: 1999-08-09
Publication date: 2001-01-03
Anticipated expiration: 2009-08-09

Abstract

The utility model relates to a full-functional stereo emitting, receiving, recording and playing device receiving via ear packs, belonging to the radio class and composed of an emitter, an ear pack receiver, etc. Via switch conversion and online connection, circuits such as the emitter, etc. can convert sound and electric signals of playing, sound and other sound sources into stereo sound or monophonic FM and monophonic AM waves for emitting, and can be singly used for recording and playing and as an FM stereo radio microphone. Circuits for frequency conversion, FM, AM reception, etc. in two ear packs compose the ear pack receiver; via conversion, the circuits of the ear pack receiver can receive stereo FM wave, AM waves, FM stereo, AM broadcast and television sound emitted by the emitter, and has the functions of read follow, hearing aid and memory aid.

Description

Global function ear bag receives stereo transmitting, receving and recording-playing device

The utility model is under the jurisdiction of the portable sound equipment of including of radio class, and specifically global function ear bag receives stereo transmitting, receving and recording-playing device.

Portablely in the market include that the device of including of earphone forms mostly still is connected earphone with lead in the sound equipment with audio playback equipment, existence because of lead, carry, use extremely inconvenient, its function also is the magnetic tape record/play sound, also having the FMAM of setting up to receive, also is that monophony and volume are bigger, and the ear packet receiver of several wireless receivings is also arranged, and receive function singleness after need from other electroacoustic equipment, extracting signal of telecommunication forwarding by transponder again.Patent Office of the People's Republic of China is in No. 97222840.3 multifunctional wireless receiving system patented technologies of authorizing on March 11st, 99: the boxlike transmitter can only be launched tape playback and voice signal, and does not have independent recording playback and other function of using; The ear packet receiver also can only receive the frequency-modulated wave signal, has only hearing aid and does not have with reading function, and all be monophony.

It is little that the purpose of this utility model is to design a kind of volume, carry, easy to use, rational in infrastructure, low-grade location, circuit are simple, the recording playback sound of stereo form, frequency-modulated wave emission are received and the amplitude-modulated wave emission reception of monophony form, hearing aid, mnemonic(al), with reading and other the picking up of sound, the signal of telecommunication of sound source is incorporated into global function ear bag all over the body and receives stereo transmitting, receving and recording-playing device.

The technical solution of the utility model is: global function ear bag receives stereo transmitting, receving and recording-playing device and is made up of microcassette transmitter, ear packet receiver and amplitude modulation transponder.The microcassette transmitter circuitry comprises: stereo recording playback application circuit, f-m stereo acoustic emission application circuit reach by switch 5K ₃, 5K ₄The conversion switch circuit that constitutes and circuit output plughole 5-5, the power supply function switch 5K that holds concurrently ₅Deng.

Stereo recording playback application circuit comprises three parts: (1) by microphone 5-3, input jack 5-4, output capacitance 5C ₂, 5C ₃, filter capacitor 5C ₅, biasing resistor 5R ₅, 5R ₆Deng the pickup circuit of forming, electric capacity 5C ₂, 5C ₃Dual output end for the pickup circuit; (2) the dual track magnetic head 5-1, and its output is connected to and records/put change over switch 5K ₂On the relevant pin of middle recording playback connection; (3) stereo integrated circuit of recording and playbacking 5IC ₁And signal modulation, amplification, output and the recorded audio signals output circuit of peripheral cell formation, 2 pin of this integrated circuit, 27 pin are input, 5 pin, 24 pin are the output of its inner two-way preamplifier, 6 pin, 23 pin are the double input end of its inner attenuator, and 9 pin, 19 pin are the i.e. output of this application circuit of this integrated circuit.

F-m stereo acoustic emission application circuit comprises f-m stereo acoustic emission integrated circuit 5IC ₂And circuit and voltage stabilizing didoe 5D such as peripheral blender balance, mixed signal and pilot signal modulation, local oscillator, high frequency amplification ₁, the power supply function switch 5K that holds concurrently ₅Deng, electric capacity 5C ₂₀, 5C ₂₁Be the input of this application circuit, integrated circuit 5IC ₂7 pin are the output of this circuit.

The pickup circuit dual output end of the stereo recording playback application circuit in the microcassette transmitter circuitry, i.e. electric capacity 5C ₂, 5C ₃With dual track magnetic head 5-1 dual output end, promptly record/put change over switch 5K ₂In the public pin and the stereo integrated circuit of recording and playbacking 5IC of two recording playbacks connection ₁Be provided with pickup emission/recording playback dibit tetrad change over switch 5K between double input end 2 pin, 27 pin ₃With with reading/mnemonic(al) dibit duplex change over switch 5K ₄, stereo recording playback application circuit when tone playing state, change over switch 5K ₃Place the pickup transmitting site, by its two connections pin 5K _3-1, 5K _3-2Conversion, disconnect the dual output end of dual track magnetic head 5-1, promptly record/put change over switch 5K ₂In the public pin of two recording playbacks connection, with the dual output end of pickup circuit, i.e. electric capacity 5C ₂, 5C ₃Respectively with stereo integrated circuit of recording and playbacking 5IC ₁ Double input end 2 pin, 27 pin connect, simultaneously by change over switch 5K ₃Another connect pin 5K _3-3Disconnect motor power.

As this change over switch 5K ₃When the recording playback position, with reading/mnemonic(al) change over switch 5K ₄Place with reading location, connect pin to pickup emission/playback switch 5K by its right side singal ₃One connect pin 5K _3-2Conversion again, i.e. switch 5K ₄The next pin cut-off switch 5K ₃5K _3-2Connection interface channel, and realize to disconnect one road output of dual track magnetic head 5-1 is electric capacity 5C by its upper pin with one road output of pickup circuit ₃Be connected to stereo integrated circuit of recording and playbacking 5IC ₁Input 27 pin, another output of dual track magnetic head 5-1 is still by change over switch 5K ₃5K _3-1Connect pin and stereo integrated circuit of recording and playbacking 5IC ₁Another input 2 pin connect, with reading/mnemonic(al) change over switch 5K ₄Return when putting the mnemonic(al) position, recover switch 5K by its next pin ₃5K _3-2The connection interface channel; Change over switch 5K ₄The left side one is with reading indication.

In f-m stereo acoustic emission application circuit, its double input end, i.e. integrated circuit 5IC ₂1 pin, 18 pin are through coupling capacitance 5C ₂₀, 5C ₂₁Be connected to stereo integrated circuit of recording and playbacking 5IC respectively ₁Inner two-way preamplifier output 24 pin, 5 pin, and at one road output 5 pin and coupling capacitance 5C ₂₁Between line attachment output plughole 5-5.

Change over switch 5K ₃5K _3-3Connection is the power supply control of motor, 5K _3-4Connection is the switching conversion of machine inside trumpet.

Do not change between f-m stereo acoustic emission application circuit and the stereo recording playback application circuit, by mains switch 5K ₅The function of holding concurrently conversion.

By above structure as seen: pickup emission/playback switch 5K in the microcassette transmitter circuitry ₃In the recording playback position, with reading/mnemonic(al) change over switch 5K ₄When the mnemonic(al) position, be common headphones formula videocorder.Change over switch 5K is promptly recorded/put to videocorder in tone playing state ₂At playback position, with reading/mnemonic(al) change over switch 5K ₄Place with reading location, by change over switch 5K ₄Signal connects pin by switch 5K ₃5K _3-2Connection disconnects an output of dual track magnetic head 5-1, promptly records/put change over switch 5K ₂In recording playback connection public pin and insert an output of pickup circuit, i.e. electric capacity 5C ₃, realize that pickup signal and playback signal enter subordinate's circuit simultaneously, through L, R passage modulate respectively, amplification is after output plughole 5-6 drives two wired earphones, dichotic listening, the formation contrast effect is promptly with reading.Will be with reading/mnemonic(al) change over switch 5K ₄Return and place mnemonic(al) position, pickup emission/playback switch 5K ₃Place the pickup transmitting site, promptly have from song from the remind memory of listening.Circuit is given the power supply of f-m stereo acoustic emission application circuit at this state, just is pickup puberty, with change over switch 5K ₃Return and put the recording playback position, circuit promptly changes the playback emission over to, at this moment, owing to still have residual signal output in the stereo recording playback application circuit, can transmit by the wired earphone monitoring.

In the transmitter circuitry input jack 5-4 can by with being connected of special-purpose on line, the signal of telecommunication of other electroacoustic equipment output is imported this circuit, emission or directly listen to again after the corresponding conversion of change over switch by wired earphone or machine inside trumpet, circuit output plughole 5-5 can be made the amplitude-modulated wave signal source or import other electroacoustic equipment modulation treatment through the input of road audio signal after special-purpose on line is with the preposition amplification of this transmitter circuitry neutral body sound integrated circuit of recording and playbacking amplitude modulation transponder.

This transmitter can use separately for videocorder, wireless frequency modulation stereophone, transponder, have concurrently with read, remind memory.

The emission of amplitude-modulated wave is finished by the amplitude modulation transponder, and this transponder is by input jack 6-10, coupling capacitance 6C ₃₁, oscillator, biasing resistor 6R ₂₃, high frequency earthing electric capacity 6C ₃₂With formations such as voltage stabilizing didoe, filter capacitors, wherein oscillator is by triode 6BG ₁, oscillator coil 6B, variable capacitance 6C ₃₃With emitter resistance 6R ₂₄Form its input, i.e. triode 6BG ₁Base stage is through coupling capacitance 6C ₃₁Be connected with input jack 6-10.Through special-purpose on line by input jack through coupling capacitance 6C ₃₁The frequency of oscillation modulation back that the audio signal frequency of input and oscillator produce produces 530-1650KHz amplitude modulation carrier wave, to space radiation, realizes the emission of amplitude-modulated wave by oscillator coil 6B.

The special-purpose on line of two-way plug is that the twin-core of a two-way plug cord of twin-core that is provided with the decay adjuster and one one jack, double plug divides siding to form, and two each core of plug wire of twin-core establish one respectively by isolation resistance 9R ₄₇, 9R ₄₈, potentiometer 9W ₆, 9W ₇, filter capacitor 9C ₈₁, 9C ₈₂The decay adjuster of Gou Chenging respectively.

Ear packet receiver circuit comprise left Er Baonei the first time frequency changer circuit and the auris dextra bag in receiver circuit.

The frequency changer circuit first time that left side Er Baonei establishes is made up of mixing, local oscillator, three main circuits of frequency-selecting, wherein: by triode 8BG ₂, resistance 8R ₂₆, 8R ₂₇, 8R ₂₈, electric capacity 8C ₄₂Constitute mixting circuit, comprise by coil 8L ₁With electric capacity 8C ₃₆The untuned input circuit that constitutes, its output, i.e. electric capacity 8C ₃₆Meet triode 8BG ₂Base stage; By triode 8BG ₃, resistance 8R ₃₀, 8R ₃₁, 8R ₃₂,

electric capacity

8C ₄₇, 8C ₄₈Constitute local oscillation circuit, comprise variable capacitance diode 8V _C2With isolation capacitance 8C ₅₀Be parallel to coil 8L after the series connection ₉Two ends, variable capacitance diode 8V _C2Negative terminal is through isolation resistance 8R ₃₃Be connected to the potentiometer 8W that is connected across the power supply positive and negative electrode ₃In head and the local oscillator tuning circuit that constitutes, electric capacity 8C ₄₆Be the local oscillation circuit output, meet mixing triode 8BG ₂Base stage is in addition by coil 8L ₇, 8L ₈

Electric capacity

8C ₄₃, 8C ₄₄, 8C ₄₅, resistance 8R ₂₉Constitute the LC frequency selection circuit, mixting circuit output, i.e. triode 8BG ₂Collector electrode directly is connected with the frequency selection circuit input, wherein electric capacity 8C ₄₅Be the frequency selection circuit output, i.e. the output of frequency changer circuit.

The television audio signals frequency is received by antenna, through input circuit input mixting circuit, mix the new frequency of generation in the inner frequency of oscillation of this circuit with the local oscillation circuit input, and by mixting circuit output input frequency selection circuit, select 81MHz first IF-FRE, input FM reception application circuit carries out modulation treatment such as double conversion, and output.

The receiver circuit of establishing in the auris dextra bag comprises following six parallel circuits:

(1) the FM reception application circuit is by FM reception integrated circuit 8IC ₃And FM frequency range low end extension to the 80-108MHz FM reception application circuit of peripheral cell formation, coil 8L in the circuit ₁₀,

electric capacity

8C ₆₁, 8C ₆₂Form the untuned input circuit, its output capacitance 8C ₆₁Be connected to FM reception integrated circuit 8IC ₃Input 12 pin, by variable capacitance 8C ₅₅, electric capacity 8C ₅₆, coil 8L ₁₁Constitute the local oscillator tuning circuit, resistance 8R ₃₆, variable resistor 8R ₃₇And electric capacity 8C ₆₅Constitute low pass filter, electric capacity 8C ₆₅Be the output of this application circuit;

(2) amplitude modulation reception application circuit is by amplitude modulation receiving integrate circuit 8IC ₆With coil 8L ₁₂, variable capacitance 8C ₆₈The reception of forming is input circuit and biasing resistor 8R ₃₈, filter capacitor 8C ₆₉, voltage stabilizing didoe 8D ₂Etc. formation, the direct and amplitude modulation receiving integrate circuit 8IC of the output of input circuit ₆Input 2 pin connect, and its 3 pin is the output of this application circuit;

(3) the pickup circuit is by microphone 8-11 and by triode 8BG ₄, resistance 8R ₄₁, 8R ₄₂The preamplifier that constitutes is formed, resistance 8R ₄₀Be the biasing resistor of microphone, the microphone output is through coupling capacitance 8C ₇₀With the preamplifier input, i.e. triode 8BG ₄Base stage connects, and the pickup circuit output end is triode 8BG ₄Collector electrode;

(4) the stereo decoding application circuit is by stereo decoding integrated circuit 8IC ₄And by

electric capacity

8C ₇₄, 8C ₇₅, resistance 8R ₄₄The low pass filter of forming, variable resistor 8R ₄₅, resistance 8R ₄₆The voltage controlled oscillator of forming is adjusted circuit and filter capacitor 8C ₇₆Constitute electric capacity 8C ₇₁Be this application circuit input, integrated circuit 8IC ₄7 pin are stereo/monophony conversion, and 5 pin, 6 pin are the output of this application circuit;

(5) the double power amplifier circuit is by double power amplifier integrated circuit 8IC ₅And by

electric capacity

8C ₇₇, 8C ₇₈, potentiometer 8W ₅, 8W ₄Two input circuits that constitute are respectively formed, and its double input end is respectively

electric capacity

8C ₇₇, 8C ₇₈, double power amplifier integrated circuit 8IC ₅6 pin, 7 pin

meet output capacitance

8C ₈₀, 8C ₇₉I.e. this application circuit output;

(6) between above five circuit, be provided with by dibit ganged

switch

8K ₇, 8K ₈, three tetrad switch 8K ₉The conversion switch circuit of forming, i.e. the feature circuit of this receiver circuit:

At FM reception application circuit output, i.e. electric capacity 8C ₆₅Receive application circuit output, i.e. integrated circuit 8IC with amplitude modulation ₆The input of 3 pin and stereo decoding application circuit, i.e. electric capacity 8C ₇₁Between be provided with frequency modulation/amplitude modulation dibit duplex change over switch 8K ₈, its first line of a couplet is power source conversion, the second line of a couplet is a conversion of signals, this change over switch 8K ₈When the frequency modulation position, connect pin with FM reception application circuit output, i.e. electric capacity 8C by its signal ₆₅With stereo decoding application circuit input, i.e. electric capacity 8C ₇₁Connect this change over switch 8K ₈During the amplitude modulation position, the conversion by its signal connection pin receives the application circuit output with amplitude modulation, i.e. integrated circuit 8IC ₆3 pin and stereo decoding application circuit input, i.e. electric capacity 8C ₇₁Connect, at this change over switch 8K ₈In the time of conversion, disconnect the power supply of irrelevant circuit by its first line of a couplet pin.

At the dual output end of stereo decoding application circuit, i.e. integrated circuit 8IC ₄5 pin, 6 pin and pickup circuit output end are triode 8BG ₄The input of the dual input circuit of collector electrode and double power amplifier circuit, i.e.

electric capacity

8C ₇₇, 8C ₇₈Between be provided with radio reception/with reading/three tetrad change over switches of

hearing aid

8K ₉, 8 pins of its right-hand member relative two are conversion of signals, 8 pins of left end relative two are power source conversion.

Change over switch 8K ₉When the radio reception position, the dual output end of stereo decoding application circuit, i.e. integrated circuit 8IC ₄5 pin, 6 pin through the upper and lower relevant pin of this switch right-hand member respectively with the double input end of double power amplifier circuit, i.e.

electric capacity

8C ₇₈, 8C ₇₇Connect; Change over switch 8K ₉With reading location the time, the relevant pin of its right-hand member second line of a couplet disconnects an output of stereo decoding application circuit, i.e. integrated circuit 8IC ₄5 pin, with the pickup circuit output end, i.e. triode 8BG ₄An input of collector electrode and double power amplifier circuit, i.e. electric capacity 8C ₇₇Connect another output of stereo decoding application circuit, i.e. integrated circuit 8IC ₄6 pin still pass through relevant pin and another input of double power amplifier circuit, i.e. the electric capacity 8C of this switch right-hand member first line of a couplet ₇₈Connect; Change over switch 8K ₉When the hearing aid position, disconnect the dual output end of stereo decoding application circuit, i.e. integrated circuit 8IC by the relevant pin of its right-hand member upper and lower two ₄5 pin, 6 pin, and with the double input end of double power amplifier circuit, i.e.

electric capacity

8C ₇₇, 8C ₇₈Be connected to the output of pickup circuit after the parallel connection, i.e. triode 8BG ₄Collector electrode.

In radio reception/with reading/hearing aid change over switch 8K ₉In the time of the function conversion, its left end two is correlated with, and each pin will disconnect synchronously or the power supply of join dependency circuit.

As change over switch 8K ₈In the frequency modulation position, change over switch 8K ₉When the radio reception position, stir change over switch 8K ₇To the frequency changer circuit power supply, receiver circuit enters the television field frame accepting state, with switch 8K _7-1Join synchronous 8K _7-2Connect pin with stereo decoding integrated circuit 8IC ₄7 pin insert positive source; Disconnect the frequency changer circuit power supply, switch 8K _7-2Connect pin with stereo decoding integrated circuit 8IC ₄7 pin withdraw from positive source and insert amplitude modulation reception application circuit anode, and circuit changes the FM multiplex accepting state over to; Dial change over switch 8K ₈When the amplitude modulation position, circuit is the amplitude modulation accepting state, and stereo decoding integrated circuit 8IC ₄7 pin and amplitude modulation receive the application circuit anode and insert positive source simultaneously; As change over switch 8K ₉Place with reading location, through the conversion of switch pin, the double power amplifier circuit is just imported one tunnel received signal and one tunnel pickup signal, respectively through double power amplifier integrated circuit 8IC ₅Inner two-way amplifier 8IC _5-1, 8IC _5-2Amplify the multi-form monophonic signal of back output two-way, through

output capacitance

8C ₇₉, 8C ₈₀Drive two earphones,, form contrast effect, be with reading by dichotic listening; Change over switch 8K ₉Place the hearing aid position, its signal connects the two-way output that pin disconnects the stereo decoding application circuit, i.e. integrated circuit 8IC ₄5 pin, 6 pin divide two-way input double power amplifier circuit with pickup signal, amplify through two-way, and the identical monophonic signal of output two-way promptly has hearing aid effect, has concurrently from song from the remind memory of listening.At change over switch 8K ₉In the time of the function conversion, switch 8K ₉Power source conversion connection will disconnect synchronously or the power supply of join dependency circuit.

The set twin-core output plughole 8-12 of receiver circuit output, its twin-core meet the dual output electric capacity 8C of double power amplifier circuit respectively ₇₉, 8C ₈₀Output, can be connected by the input jack of special-purpose on line with transmitter input jack or amplitude modulation transponder input jack and other electroacoustic equipment.

As seen ear packet receiver circuit is through switch transition, can receive the frequency modulation monophony respectively and comprise signals such as television field frame, FM multiplex, amplitude modulation monophony and sound, and can export again, handle again by other electroacoustic equipment, simultaneously with read, hearing aid is held concurrently remind memory.

The utility model contrast prior art, progressive part is that function is complete, volume is little, carry, easy to use, owing to designed the FM multiplex radiating circuit that combines with stereo recording playback application circuit in the transmitter circuitry, be provided with conversion switch circuit between pickup circuit and the stereo playback circuitry, and circuit output plughole, the special-purpose on line of the two-way plug that is equipped with outside adding, make transmitter not merely can be converted into the emission of stereo fm ripple to tape playback and voice signal, and forwarding arranged, functional transcription, the voice signal of extraneous sound source, the signal of telecommunication of electroacoustic equipment, electroacoustic signal all can be converted into frequency-modulated wave emission or be recorded by recording circuit by this transmitter, circuit output plughole and amplitude modulation transponder that transmitter circuitry is arranged, all above-mentioned signals also all can be converted into the amplitude-modulated wave emission, and transmitter itself can be for videocorder, the wireless frequency modulation stereophone, transponder uses separately and has with reading, remind memory; The ear packet receiver is because in FM reception, amplitude modulation receives, stereo decoding, pickup, be provided with conversion switch circuit between five parallel circuits of double power amplifier, conversion through switching circuit, make this receiver remove the f-m stereo acoustical signal of reception this device transmitter and the emission of amplitude modulation transponder, outside the amplitude-modulated wave signal, the space belongs to public received signal for three kinds and all can receive, self also with match with received signal with reading function and the hearing aid remind memory of holding concurrently, the output plughole of himself can be recorded the signal that receives or emission again through special-purpose on line by transmitter circuitry, also can import other electroacoustic equipments and make relevant treatment, access because of the stereo decoding application circuit, every f-m stereo acoustical signal all can reflect in this device, reappear stereophonic effect, for the analog signal of sound, realized a complete set of function of circuit kit.

The explanation of accompanying drawing drawing:

Fig. 1 is the utility model ear packet receiver cross-sectional view;

Fig. 2 is the utility model microcassette transmitter stereoscopic schematic diagram;

Fig. 3 looks the part section structural representation for the utility model microcassette transmitter left side;

Fig. 4 is the utility model microcassette transmitter circuitry block diagram;

Fig. 5 is the utility model microcassette transmitter circuitry figure;

Fig. 6 is the utility model amplitude modulation repeater circuit figure;

Fig. 7 is the utility model ear packet receiver circuit block diagram;

Fig. 8 is the utility model ear packet receiver circuit diagram;

Fig. 9 is the special-purpose on line structural representation of the two-way plug of the utility model.

Wherein: antenna 1, trim-pot 2, earphone 3, battery compartment 4, frequency changer circuit mains switch 5, Electret condenser microphone 6, tuning capacitor 7, mains switch 8, volume potentiometer 9, earphone 10, volume potentiometer 11, change over switch 12, change over switch 13, with reading to indicate 14, change over switch 15, volume potentiometer 16, pickup emission and recording playback indication 17, change over switch 18, Electret condenser microphone 19 in the machine, radiating circuit power supply indication 20, radiating circuit mains switch 21, tranmitting frequency regulator potentiometer 22, transmitting antenna jack 23, input jack 24, output plughole 25, machine inside trumpet 26, circuit output plughole 27.

The utility model execution mode as shown in drawings.Wherein: Fig. 5 is microcassette transmitter circuitry figure, the core parts in this circuit: two integrated circuit 5IC ₁, 5IC ₂Select stereo integrated circuit of recording and playbacking LAG665F and f-m stereo acoustic emission integrated circuit BA1404F respectively for use from the translator speed-stabilizing circuit, their volumes are little, peripheral cell is few, operating voltage is low, integrated circuit LAG665F is L, R binary channels, its inner preamplifier output 5 pin, 24 pin externally are connected respectively with input 6 pin, 23 pin of back level attenuator, and this structure provides condition for the audio signal after its preposition amplification of extraction; Integrated circuit BA1404F has wide frequency range, circuit debugging characteristic of simple.

Change over switch 5K is promptly recorded/put to dual track magnetic head 5-1 output in stereo recording playback application circuit ₂In public pin and the dual output end of pickup circuit, i.e. the electric capacity 5C of two recording playbacks connection ₂, 5C ₃With stereo integrated circuit of recording and playbacking 5IC ₁ Double input end 2 pin, 27 pin between the dibit tetrad change over switch 5K that inserts ₃With to switch 5K ₃One connect pin 5K _3-2Zhuan Huan dibit duplex change over switch 5K again ₄In, 5K _3-1Join public pin and meet stereo integrated circuit of recording and playbacking 5IC ₁Input 2 pin, the output that its upper end divides pin to connect the pickup circuit, i.e. electric capacity 5C ₂, its lower end is divided pin to connect to record/put change over switch 5K ₂Recording playback is changed on one the public pin, i.e. dual track magnetic head 5-1 output; Switch 5K _3-2Join public pin and meet conversion switch 5K ₄Pin is divided, switch 5K in the lower end of right side singal conversion connection _3-2Another output of pin and pickup circuit, i.e. electric capacity 5C are divided in the connection upper end ₃Back in parallel and switch 5K ₄The upper end of signal connection divides pin to connect switch 5K _3-2Connection lower end pin connects records/puts change over switch 5K ₂Recording playback is changed on the public pin of another connection, i.e. dual track magnetic head 5-1 another output, switch 5K ₃Upper is the pickup emission, and the next is recording playback, the 5K of this switch _3-1, 5K _3-2Two is conversion of signals, 5K _3-3Connection is motor power control, 5K _3-4Connection is the break-make of machine inside trumpet 5-7; Switch 5K ₄The public pin of right side singal connection meets stereo integrated circuit of recording and playbacking 5IC ₁Another input 27 pin.This switch 5K ₄Right side singal connection is the function conversion, and it is upper for reading, and the next is mnemonic(al), switch 5K ₄The left side one is for reading indication, and its public pin connects power supply, and pin sending and receiving optical diode LED is divided in the upper end ₄

By the corresponding conversion of two switches, stereo recording playback application circuit itself is increased with reading and praising certainly from the remind memory of listening, be pickup signal and playback signal to be distinguished input ic 5IC simultaneously with reading function through the conversion of switch ₁L, R two passages carry out modulation treatment after output plughole 5-6 output, through test, because the two paths of signals content is identical, so the audio mixing that causes because of stereo crosstalk influences minimum.

F-m stereo acoustic emission application circuit is by coupling capacitance 5C ₂₀, 5C ₂₁Directly from stereo integrated circuit of recording and playbacking 5IC ₁24 pin, 5 pin extract audio signal after a part of preposition amplification, through 1 pin, 18 pin input ic 5IC ₂,, produce the stereo composite signal carrier wave, by this integrated circuit 5IC through this application circuit modulation treatment ₂The output of 7 pin is through electric capacity 5C ₀Emission.Adjust resistance 5R ₁₈The inductance value of resistance and local oscillator coil, high unwrapping wire circle can make the adjustable extent of the satisfied 75-108MHz of tranmitting frequency and make circuit working in optimum state; Regulator potentiometer 5W ₂Change variable capacitance diode 5V _C1Capacitance, get final product select transmit frequency and change local frequency.

As seen from Figure 5, record/put change over switch 5K ₂Toggle switch 5K at an arbitrary position ₃When the pickup transmitting site, switch 5K _3-3Connection all disconnects motor power, and motor stops, and the tape operation stops.If circuit is at the toggle switch 5K midway that records ₃In the pickup transmitting site, motor stop will influence recording carrying out, complete for guaranteeing to record, circuit is at recording state, change over switch 5K ₃Be locked in the recording playback position.

Because emission is not changed with recording playback, it is the audio signal after a part of preposition amplification of extraction from playback circuitry, and the residual signal in the stereo recording playback application circuit still carries out the routine modulation in this circuit, be the existing function of earphone-type videocorder, and because of playback or pickup and emission synchronous, so monitor function is arranged, signal is taken at prime, and it is adjustable to monitor volume.

Diode 5D among Fig. 5 ₁Be voltage stabilizing didoe, light-emitting diode 5LED ₁, 5LED ₂, 5LED ₃, 5LED ₄Be respectively the radiating circuit power supply, record and put (hold concurrently playback emission) and indicate with read states.

Fig. 6 is amplitude modulation repeater circuit figure, and this circuit is by input jack 6-10, coupling capacitance 6C ₃₁, oscillator and biasing resistor 6R ₂₃, high frequency earthing electric capacity 6C ₃₂And voltage stabilizing didoe 6DW, filter capacitor 6C ₃₄, 6C ₃₅Etc. formation, wherein jack 6-10 is through coupling capacitance 6C ₃₁Connect by triode 6BG ₁, oscillator coil 6B and emitter resistance 6R ₂₄, variable capacitance 6C ₃₃The input of the oscillator of forming, i.e. triode 6BG ₁Base stage.When audio signal through jack 6-10, coupling capacitance 6C ₃₁The input oscillator, the audio signal frequency modulation that the frequency of oscillation that is produced by oscillator promptly is transfused to and produce the amplitude modulation carrier wave of 530-1650KHz by oscillator coil 6B radiation, realizes the amplitude-modulated wave emission.Change variable capacitance 6C ₃₃Capacity can change tranmitting frequency.

Fig. 9 is the special-purpose on line structural representation of two-way plug: 9LX among the figure ₁Be two-way plug cord, plug 9-17 is provided with by partial pressure potential device 9W in the circuit for signal output for signal input, plug 9-18 ₆, 9W ₇, isolation resistance 9R ₄₇, 9R ₄₈, filter capacitor 9C ₈₁, 9C ₈₂The decay adjuster of Zu Chenging respectively is so that output signal voltage adapts to subordinate's circuit requirement; 9LX ₂Be dual track output on line, jack 9-19 plugs 9-17, and plug 9-20,9-21 can connect two output plugholes of dual track output respectively are with by this device reproduction of stereo effect.

Fig. 8 is the utility model ear packet receiver circuit diagram: its overall circuit by left Er Baonei with triode 8BG ₂, 8BG ₃Frequency changer circuit and reception antenna 8-15, earphone 8-13, the mains switch 8K first time for core ₇, in power supply 8-16 and the auris dextra bag by FM reception integrated circuit 8IC ₃, amplitude modulation receiving integrate circuit 8IC ₆, stereo decoding integrated circuit 8IC ₄, Electret condenser microphone 8-11 and triode 8BG ₄Deng and separately peripheral cell the FM reception application circuit, the amplitude modulation that constitute respectively receive application circuit, stereo decoding application circuit, pickup circuit and double power amplifier integrated circuit 8IC ₅Double power amplifier circuit and switch 8K that itself constitutes ₈, 8K ₉The conversion switch circuit, output plughole 8-12, earphone 8-14, the mains switch 8K that constitute ₁₀Form.

Left side Er Baonei circuit: as seen from Figure 8, the utility model still adopts existing double conversion technology to the reception of television field frame.In the circuit, by

electric capacity

8C ₃₇, 8C ₃₈, 8C ₃₉, 8C ₄₀, coil 8L ₂, 8L ₃, 8L ₄, 8L ₅The access of the filter circuit that constitutes also can be adopted tandem-type connection, i.e. coil 8L ₂ Electric capacity 8C ₃₇And interface meets electric capacity 8C ₃₆Output, electric capacity 8C ₄₀Meet triode 8BG ₂Base stage; By coil 8L ₆, electric capacity 8C ₄₁The intermediate frequency absorption circuit of forming is by coil 8L ₆Meet triode 8BG ₂Base stage can suppress the 81MHz intermediate frequency and disturb.The turning device that this circuit adopted is by variable capacitance diode 8V _C2Etc. formation, variable capacitance diode 8V _C2With electric capacity 8C ₅₀Be parallel to coil 8L after the series connection ₉Two ends, variable capacitance diode 8V _C2Negative terminal is through isolation resistance 8R ₃₃Be connected to the potentiometer 8W that is connected across the power supply positive and negative electrode ₃On the middle head.Reconcile potentiometer 8W ₃Change and be added in variable capacitance diode 8V _C2On voltage and change variable capacitance diode 8V _C2Capacitance, and then change the resonance frequency of its circuit, realize tuning purpose, promptly satisfied the condition that subordinate's circuit receives the V-band television field frame, again because the broadband untuned of mixer stage input circuit and the characteristics of tuning circuit continuously-tuning, and, produce first IF-FRE input subordinate circuit of 81MHz with a certain suitable harmonic wave input, mixing, the frequency-selecting of the signal carrier frequency of U band tv sound accompaniment, to receive the television field frame of U frequency range.

Core parts in the auris dextra bag inner receiver circuit: four integrated circuits have been selected TDA7021T (8IC3), CD7642 (8IC for use ₆), TDA7040T (8IC ₄) and TDA7050T (8IC ₅), and between the FM reception application circuit that constitutes with integrated circuit, microphone and triode and peripheral cell thereof, amplitude modulation reception application circuit, stereo decoding application circuit, pickup circuit and double power amplifier circuit, insert by dibit ganged switch 8K accordingly ₇, 8K ₈, three tetrad switch 8K ₉The conversion switch circuit of forming.In the switching circuit, switch 8K ₇8K _7-1Connection is changed 8K for the frequency changer circuit mains switch function of holding concurrently _7-2The public pin of connection is through resistance 8R ₄₃Meet stereo decoding integrated circuit 8IC ₄7 pin, left end divide pin to meet amplitude modulation reception application circuit anode, i.e. voltage stabilizing didoe 8D ₂Anode, right-hand member divide pin and switch 8K ₈Insert switch 8K after the public pin parallel connection of the first line of a couplet ₉The power source conversion connection of left end, switch 8K ₈The first line of a couplet is the power source conversion connection, and its left end divides pin to connect FM reception application circuit anode, and right-hand member divides pin to meet amplitude modulation reception application circuit anode, switch 8K ₈The second line of a couplet is a conversion of signals, and its public pin meets stereo decoding application circuit input, i.e. electric capacity 8C ₇₁, left end divides pin to meet FM reception application circuit output, i.e. electric capacity 8C ₆₅, right-hand member divides pin to meet amplitude modulation reception application circuit output, i.e. amplitude modulation receiving integrate circuit 8IC ₆3 pin, switch 8K ₉Left end two 8 pins up and down is a power source conversion, wherein goes up from left to right 1 pin, following 4 pin skies, meets mains switch 8K after last 2 pin, 4 pin, following 1 pin, the 3 pin parallel connections ₁₀, last 3 pin connect pickup circuit anode, and 2 pin meet switch 8K down ₈Public pin of the first line of a couplet and switch 8K _7-2The connection right-hand member divides pin and stereo decoding integrated circuit 8IC ₄Anode, i.e. its 4 pin, switch 8K ₉Right-hand member up and down two 8 pins is a conversion of signals, wherein goes up from left to right an input that connects the double power amplifier circuit after 1 pin, the 3 pin parallel connections, i.e. electric capacity 8C ₇₈, connect down another input of double power amplifier circuit after 2 pin, the 4 pin parallel connections, i.e. electric capacity 8C ₇₇, last 2 pin and following 1 pin meet stereo decoding integrated circuit 8IC respectively ₄6 pin, 5 pin, last 4 pin and down connect the pickup circuit output end after the 3 pin parallel connections, i.e. triode 81BG ₄Collector electrode.Through the different switching of above-mentioned switch, circuit just changes different operating states over to.

In the FM reception application circuit, coil 8L ₁₀With

electric capacity

8C ₆₁, 8C ₆₂Form the untuned input circuit, suitably select its parameter, can satisfy the receive frequency of low end extension to 80-108MHz scope, the selection of receive frequency is by tuning capacity 8C ₅₅Capacity, the frequency of oscillation that changes local oscillation circuit realizes.

Receive the suitable coil 8L that selects in the application circuit in amplitude modulation ₁₂Inductance value and tuning capacity 8C ₆₈Range of capacity can satisfy reception to 540-1600KHz scope amplitude-modulated wave, change tuning capacity 8C ₆₈The optionally connected receipts frequency of capacity.

In this receiver circuit, as change over switch 8K ₈Place the FM reception position, disconnect f-m stereo acoustical signal and FM stereophonic broadcast signal that the frequency changer circuit power supply can receive the emission of the utility model transmitter, through switch 8K ₈FM channel input stereo audio decoding application circuit, the output of decoding back is again through change over switch 8K ₉Radio reception passage input double power amplifier circuit, through two-way amplifier 8LC _5-1, 8LC _5-2Amplify back output stereophonic signal.

As seen from Figure 8, this receiver circuit is as change over switch 8K ₈Place the FM reception position, and frequency changer circuit when power supply, circuit just is in television field frame and fm broadcast signal while accepting state, in theory, because television audio signals first intermediate frequency (IF) Design is 81MHz, and fm broadcast signal frequency low side is 88MHz, the receive frequency that changes the FM reception application circuit can suppress the 81MHz frequency and normally receive FM broadcasting, but facts have proved, because circuit is simple, on a certain frequency, still can produce some interference, and the utility model transmitter tranmitting frequency cooperates with receiver with 81MHz also, be described as for this reason: disconnect the frequency changer circuit power supply.

Change over switch 8K ₈Place the amplitude modulation position, circuit receives the amplitude-modulated wave and the amplitude modulation broadcasting signal of this device amplitude modulation transponder emission, because of switch 8K _7-2Connection is with stereo decoding integrated circuit 8IC ₄7 pin and amplitude modulation receive the application circuit anode and insert positive source simultaneously, make this IC interior voltage controlled oscillator failure of oscillation, and this circuit is only done the identical monophonic signal of signalling channel output two-way, through change over switch 8K ₉Radio reception path input double power amplifier circuit.

Change over switch 8K ₈Place the frequency modulation position, by switch 8K _7-1Connect logical frequency changer circuit power supply, promptly import the FM reception application circuit by 81MHz first IF-FRE of frequency changer circuit output, through double conversion, the modulation of this circuit, the audio signal behind the output frequency discrimination is through electric capacity 8C ₇₁Input stereo audio decoding application circuit is because of switch 8K _7-2Connection is again with stereo decoding integrated circuit 8IC ₄7 pin insert positive source, still make this decoding circuit output two-way monophonic signal, through switch 8K ₉Radio reception passage input double power amplifier circuit.

Change over switch 8K ₉Place with reading location, its left end pin inserts power supply with pickup circuit anode, and the relevant pin of its right-hand member signal connection disconnects stereo decoding integrated circuit 8IC ₄Output 5 pin, insert the output of pickup circuit, i.e. triode 8BG ₄Collector electrode makes voice signal and radio reception signal simultaneously through switch 8K ₉Corresponding pin import the two-way amplifier of double power amplifier circuit respectively, after the amplification, the multi-form monophonic signal of output two-way drives two earphones, by dichotic listening, can form contrast effect, promptly with reading.

As switch 8K ₉When placing the hearing aid position, change over switch 8K ₉Left end two relevant pins disconnect other circuit powers and only supply with the pickup circuit, at this moment change over switch 8K ₉The two-way amplifier that the relevant pin of right-hand member signal connection divides two-way to import the double power amplifier circuit pickup signal amplifies the identical two-way monophonic signal of output, is hearing aid and holds concurrently from praising from the remind memory of listening.

Claims

1. global function ear bag receives stereo transmitting, receving and recording-playing device and is made up of microcassette transmitter, ear packet receiver and amplitude modulation transponder, and wherein: the microcassette transmitter circuitry comprises stereo recording playback application circuit, f-m stereo acoustic emission application circuit etc.; What the ear packet receiver comprises that left Er Baonei establishes first time established in frequency changer circuit and the auris dextra bag receives the receiver circuit that application circuit, stereo decoding application circuit, pickup circuit and double power amplifier circuit etc. constitute by FM frequency range low end extension to 80-108MHz FM reception application circuit, amplitude modulation, it is characterized in that: the pickup circuit dual output end of the stereo recording playback application circuit in the microcassette transmitter circuitry, i.e. electric capacity 5C ₂, 5C ₃With dual track magnetic head 5-1 dual output end, promptly record/put change over switch 5K ₂In the public pin and the stereo integrated circuit of recording and playbacking 5IC of two recording playbacks connection ₁Be provided with pickup emission/recording playback dibit tetrad change over switch 5K between double input end 2 pin, 27 pin ₃With with reading/mnemonic(al) dibit duplex change over switch 5K ₄, stereo recording playback application circuit when tone playing state, change over switch 5K ₃Place the pickup transmitting site, by its two connections pin 5K _3-1, 5K _3-2Conversion, disconnect the dual output end of dual track magnetic head 5-1, promptly record/put change over switch 5K ₂In the public pin of two recording playbacks connection, with the dual output end of pickup circuit, i.e. electric capacity 5C ₂, 5C ₃Respectively with stereo integrated circuit of recording and playbacking 5IC ₁Double input end 2 pin, 27 pin connect, simultaneously by change over switch 5K ₃Another connect pin 5K _3-3Disconnect motor power, as this change over switch 5K ₃When the recording playback position, with reading/mnemonic(al) change over switch 5K ₄Place with reading location, connect pin to pickup emission/playback switch 5K by its right side singal ₃One connect pin 5K _3-2Conversion again, i.e. switch 5K ₄The next pin cut-off switch 5K ₃5K _3-2Connection interface channel, and realize to disconnect one road output of dual track magnetic head 5-1, by the road output of its upper pin with the pickup circuit, i.e. electric capacity 5C ₃Be connected to stereo integrated circuit of recording and playbacking 5IC ₁Input 27 pin, another output of dual track magnetic head 5-1 is still by change over switch 5K ₃5K _3-1Connect pin and stereo integrated circuit of recording and playbacking 5IC ₁Another input 2 pin connect, with reading/mnemonic(al) change over switch 5K ₄Return when putting the mnemonic(al) position, recover switch 5K by its next pin ₃5K _3-2The connection interface channel; Change over switch 5K ₄The left side one is with reading indication; In f-m stereo acoustic emission application circuit, its double input end, i.e. integrated circuit 5IC ₂1 pin, 18 pin are through coupling capacitance 5C ₂₀, 5C ₂₁Be connected to stereo integrated circuit of recording and playbacking 5IC respectively ₁Inner two-way preamplifier output 24 pin, 5 pin, and at one road output 5 pin and coupling capacitance 5C ₂₁Between line attachment output plughole 5-5; Ear packet receiver circuit: at FM reception application circuit output, i.e. electric capacity 8C ₆₅Receive application circuit output, i.e. integrated circuit 8IC with amplitude modulation ₆The input of 3 pin and stereo decoding application circuit, i.e. electric capacity 8C ₇₁Between be provided with frequency modulation/amplitude modulation dibit duplex change over switch 8K ₈, its first line of a couplet is power source conversion, the second line of a couplet is a conversion of signals, this change over switch 8K ₈When the frequency modulation position, connect pin with FM reception application circuit output, i.e. electric capacity 8C by its signal ₆₅With stereo decoding application circuit input, i.e. electric capacity 8C ₇₁Connect this change over switch 8K ₈When the amplitude modulation position, the conversion by its signal connection pin receives the application circuit output with amplitude modulation, i.e. integrated circuit 8IC ₆3 pin and stereo decoding application circuit input, i.e. electric capacity 8C ₇₁Connect, at this change over switch 8K ₈In the time of conversion, disconnect the power supply of irrelevant circuit by its first line of a couplet pin; At the dual output end of stereo decoding application circuit, i.e. integrated circuit 8IC ₄5 pin, 6 pin and pickup circuit output end, i.e. triode 8BG ₄The input of the dual input circuit of collector electrode and double power amplifier circuit, i.e. electric capacity 8C ₇₇, 8C ₇₈Between be provided with radio reception/with reading/three tetrad change over switches of hearing aid 8K ₉, 8 pins of its right-hand member relative two are conversion of signals, 8 pins of left end relative two are power source conversion; Change over switch 8K ₉When the radio reception position, the dual output end of stereo decoding application circuit, i.e. integrated circuit 8IC ₄5 pin, 6 pin through the upper and lower relevant pin of this switch right-hand member respectively with the double input end of double power amplifier circuit, i.e. electric capacity 8C ₇₇, 8C ₇₈Connect; Change over switch 8K ₉With reading location the time, the relevant pin of its right-hand member second line of a couplet disconnects an output of stereo decoding application circuit, i.e. integrated circuit 8IC ₄5 pin, with the pickup circuit output end, i.e. triode 8BG ₄An input of collector electrode and double power amplifier circuit, i.e. electric capacity 8C ₇₇Connect another output of stereo decoding application circuit, i.e. integrated circuit 8IC ₄6 pin still pass through relevant pin and another input of double power amplifier circuit, i.e. the electric capacity 8C of this switch right-hand member first line of a couplet ₇₈Connect; Change over switch 8K ₉When the hearing aid position, disconnect the dual output end of stereo decoding application circuit, i.e. integrated circuit 8IC by the relevant pin of its right-hand member upper and lower two ₄5 pin, 6 pin, and with the double input end of double power amplifier circuit, i.e. electric capacity 8C ₇₇, 8C ₇₈Be connected to the output of pickup circuit after the parallel connection, i.e. triode 8BG ₄Collector electrode; In radio reception/with reading/hearing aid change over switch 8K ₉In the time of the function conversion, its left end two is correlated with, and each pin will disconnect synchronously or the power supply of join dependency circuit.

2, according to claim 1: global function ear bag receives stereo transmitting, receving and recording-playing device, and left Er Baonei establishes frequency changer circuit for the first time, it is characterized in that: frequency changer circuit adopts electric tuning, and tuning circuit is by variable capacitance diode 8V _C2With isolation capacitance 8C ₅₀Be parallel to coil 8L after the series connection ₉Two ends, variable capacitance diode 8V _C2Negative terminal is through isolation resistance 8R ₃₃Be connected to the potentiometer 8W that is connected across the power supply positive and negative electrode ₃Middle head and constitute.