CN2263420Y - Telephone selector - Google Patents

Abstract

The utility model relates to a telephone selector, which is characterized in that circuits are composed of four parts of a start and polarity protection circuit, a voltage regulator, a shutdown control circuit, a password signal pick-up pre-amplification circuit, a decoding and coding circuit, and an output circuit. The telephone selector can be realized in a mode that a circuit board is additionally arranged on a telephone set or the telephone selector is arranged in a small box and is connected in parallel to the telephone set. The utility model can cause a telephone receiver to emit ring until a prearranged password is additionally dialed after a phoning person finishes dialing a phone number; when the password is not dialed, only a signal lamp displays to distinguish incoming objects; the utility model can cause a host of the telephone set to selectively receive a telephone and can avoid interference in busy or rest.

Description

Phone Sai Laikete (selector)

The utility model relates to a kind of wire communication device, the make a phone call phone Sai Laikete (Selector is a selector) of object of particularly a kind of difference that is used on the telephone set.

Existing telephone set is as long as there is people's the tinkle of bells of making a phone call just to ring, owner during busy or rest, can bring and make nuisance calls, but if with line disconnection, then no matter how toots's number will not come in yet, phone has also lost the function of communication, and this is a contradiction.Solve this contradiction and need the phone selector (Selector) that to distinguish the object of making a phone call and carry out the demonstration of selectivity acousto-optic.

The purpose of this utility model provides a kind of automatically by the different objects of making a phone call, send the phone selector that unlike signal is selected for owner discriminatively, whether it inputs password and adopt different acousto-optic shows signal prompting owners automatically according to the people that makes a phone call is general calling people or special calling people, thereby avoid the interference of regular phone effectively, and don't influence the communication between owner and the kith and kin close friend.

The purpose of this utility model is achieved in that it is made of following several partial circuits:

A, startup and polar protective circuit: by K switch ₁, capacitor C ₁, electric bridge ZQ ₁, ZQ ₂, solid state relay SSR ₁Form; K switch ₁Input 1,2 answer the call respectively line M, L, output 3 passes through C ₁Meet ZQ ₁1, output 4 meets ZQ ₁2, ZQ ₁3,4 meet SSR respectively ₁1,2, constitute to start the loop thus; ZQ ₂1 connect K switch ₁Output 3, ZQ ₂2 pass through J ₁Normally-closed contact 2,1, SSR ₁Normally opened contact 3,4 after take back K switch ₁Output 4 constitutes polar protective circuit thus; ZQ behind polarity protection ₂3 be permanent anodal to the each several part circuit supply, be connected ZQ with follow-up each circuit ₂4 be that negative pole is connected with ground wire;

B, pressurizer and shutdown control circuit: by three terminal regulator IC ₂Microphone shuts down automatically and the time-delay automatic shutdown circuitry is formed with plucking; IC ₂Input 1 pin passes through L ₁With ZQ ₂Anodal 3 are connected, and output 3 meets follow-up each several part circuit anode, IC ₂2 pin ground connection;

Relay J ₁, triode Q ₁, Q ₂, resistance R ₂, R ₃, diode D ₁, D ₂Constitute and pluck the microphone automatic shutdown circuitry; Its circuit structure is Q ₁, Q ₂Grounded emitter, Q ₁Collection meet J by the utmost point ₁4, J ₁5 meet IC ₂1 pin, R ₂Be Q ₁Biasing resistor be again Q simultaneously ₂Load resistance, R ₂One termination IC ₂1 pin, the other end and Q ₁Base stage, Q ₂Collector electrode connect; D ₂, D ₁, R ₃Connect and compose Q ₂Biasing circuit, D ₂Negative pole meets IC ₂1 pin, D ₂Positive pole meets R ₃Back and Q ₂Base stage link to each other D ₁Positive pole meet D ₂, R ₃Node, D ₁Minus earth;

Time-base circuit IC ₁With R ₄, C ₂, C ₃, D ₃Constitute the time-delay automatic shutdown circuitry, IC ₁4,8 pin meet IC ₂3 pin, 1 pin ground connection meets C after 2,6 pin connect ₂, R ₄, C ₂Other end ground connection, R ₄Another termination IC ₂3 pin, IC ₁5 pin through C ₃Back ground connection, IC ₁Output 3 pin pass through D ₃With Q ₂Base stage is connected;

C, code signal pick up preposition amplification and decipher coding circuit

By inductance coil L ₁And resistance R ₁Be connected on ZQ after the parallel connection ₂3 pin and IC ₂1 pin between form impedance and pick up code signal, under no independent power supply situation by C ₄, R ₅, C ₅, R ₆, R ₇, Q ₃The pre-amplification circuit of forming amplifies code signal, and the code signal after the amplification passes through C ₆Transfer to decoding circuit;

Decoding circuit is by IC ₃With crystal oscillator ZX and resistance R ₈Constitute; Translate coding circuit by IC ₄And IC ₅, IC ₆And resistance R ₉, capacitor C ₇Constitute; Decoding circuit, translate coding circuit at three terminal regulator IC ₂Provide under the situation of power supply, code signal by pre-amplification circuit through C ₆Input decoding circuit decoding is sent into and is translated coding circuit and encode, latch, and distinguishes display circuit conveying control signal by preset coding requirements to the cipher control acousto-optic;

D, output circuit: be made up of ring-back sound equipment output circuit, sound and light show circuit and cipher control acousto-optic difference display circuit, three-circuit is by IC ₂Power supply is provided,

A, by musical film IC ₇Provide backward signalling, by R ₁₉And D ₁₀Form pressurizer and give musical film IC ₇The coupling power supply, R ₁₉One termination IC ₂3 pin, the other end and voltage stabilizing didoe D ₁₀Negative pole be connected to IC after connecting ₇3,4 pin, D ₁₀Positive pole, IC ₇1 pin ground connection, IC ₇2 pin be that signal output part is through C ₈After meet Q ₇Base stage; R ₁₈Be Q ₇Biasing resistor, R ₁₇Be the size of emitter current feedback resistance control output, Q ₇Collector electrode meet IC ₂3 pin, IC ₇The signal that sends passes through C ₈Enter Q ₇Base stage is given telephone line through the amplification rear feed and is made the other side who makes a phone call hear ringback tone;

B, sound and light show circuit are at IC ₂Power supply is direct-connected acousto-optic display element and circuit composition down;

C, cipher control acousto-optic difference display circuit are at IC ₂Power supply is made up of decipher coding circuit control signal output ends connection acousto-optic display element and circuit down, and the concrete form of this acousto-optic demonstration is different from the acousto-optic demonstration concrete form of b circuit.

The purpose of this utility model can also following manner realize:

1, in output circuit:

B, sound and light show circuit are the light display circuit, and it constitutes, the diode D that glows ₆Positive pole meet IC ₂3 pin, negative pole meets R ₁₁Back ground connection;

C, cipher control acousto-optic difference display circuit are the sound display circuit, and it constitutes: by R ₁₉, D ₁₀Form pressurizer and musical film IC ₇The coupling power supply, R ₁₉One termination IC ₂3 pin, the other end and voltage stabilizing didoe D ₁₀Negative pole and IC ₇3,4 pin connect D ₁₀Positive pole and IC ₇1 pin ground connection, IC ₇2 pin be signal output part and C ₈Be connected to Q after the connection ₇Base stage; Q ₇, R ₁₀, R ₁₇, C ₈Form audio amplification circuit, R ₁₈Be Q ₇Biasing resistor, R ₁₇Be emitter current feedback resistance, Q ₇Collector electrode meet IC ₂3 pin; D ₄, R ₁₅, Q ₆, R ₁₆, Y forms cipher control Stereo Switch circuit, Q ₆Base stage meet D ₄Positive pole and R ₁₅, D ₄Negative pole meet the code signal output I of decipher coding circuit, R ₁₅Other end ground connection; Q ₆Emitter pass through R ₁₆After meet Y, another termination Q of Y ₇Emitter, Q ₆Grounded collector; When code signal output I provides a negative potential, Q ₆Conducting, Y sends the tinkle of bells.

2, in output circuit:

C, cipher control acousto-optic difference display circuit also have the light display circuit of green light except that the sound display circuit, it is by D ₅, R ₁₀, D ₇, R ₁₂, Q ₄Form the diode D of green light ₇Positive pole meet IC ₂3 pin, negative pole meets R ₁₂Back and Q ₄Collector electrode link to each other Q ₄Grounded emitter, decipher coding circuit code signal output II inserts D ₅Negative pole, D ₅Positive pole and R ₁₀Ground connection after joining, Q ₄Base stage be connected on D ₅With R ₁₀On the node, when code signal, output II provides a high potential, passes through D ₅Make Q ₄Conducting, D ₇Green light shows.

3, in output circuit:

C, cipher control acousto-optic difference display circuit by the two-stage password respectively display circuit constitute, the level password display circuit be the light display circuit of display circuit and green light; Secondary password display circuit is the light display circuit of jaundice light, and it is by D ₉, R ₁₃, Q ₅, R ₁₄, D ₈Form the diode D of jaundice light ₈Positive pole meets IC ₂3 pin, negative pole polyphone R ₁₄After meet Q ₅Collector electrode, Q ₅Grounded emitter, the secondary code signal output III of decipher coding circuit meets D ₉Positive pole, D ₉Negative pole polyphone R ₁₃Back ground connection, Q ₅Base stage be connected on D ₉, R ₁₃Node on.

4, IC in the decoding circuit ₃Model is UM9203, or MCl45436 or YM9101; Translate IC in the coding circuit ₄Model is MC4514; IC ₅, IC ₆Model is CD4013.

The utlity model has following good effect: the owner that can make telephone set after the connection receiving when calling signal, can distinguish general calling object or special calling object (the close relative close friend of oneself) thus whether decision answers the call; As the owner of phone during busy or rest, the phone of making because of general calling object has only signal light to show is not had the tinkle of bells, thereby avoids effectively influencing groundwork or rest, reaches and exempts the purpose of making nuisance calls.

Elaborate below in conjunction with accompanying drawing:

Accompanying drawing is the utility model circuit structure diagram;

The utility model is based on so a kind of purpose and a kind of telephone set attachment device of designing, At additional this device of telephone set, in running order lower when this device, then can produce following merit Can: for general calling object, the enterprising traveling optical signal of telephone set shows (also can be to carry in a low voice Show), and for special calling object, then carrying out carrying out normal bell when optical signal shows The sound prompting shows by difference, gives the callee leeway to select, and avoids simultaneously general calling When the harassing and wrecking that object is unnecessary, especially busy owner or rest, certainly select not needing When being talked about, close this device and get final product. The difference of general calling object and special calling object, logical Cross owner and password is set and informs and oneself think and no matter when all need the people that oneself answers the call, special What the calling object can also be divided into according to significance level, therefore its method when the other side makes a phone call Also have any different, general calling object makes a phone call only to import normal telephone number, and special calling Object makes a phone call then to need to input the password that the telephone set owner informs behind the normal telephone number of being totally lost again (can be multidigit), it is aobvious that the different modes of making a phone call then presents different acousto-optics from recipient Show, make recipient not only can avoid general calling object to disturb but also can make own and close relative close friend maintenance The communication normal open.

For achieving the above object, circuit design should satisfy or possess following condition:

1, circuit and telephonic communication require to adapt, and can not affect the telephone set normal function;

2, when the calling party calls, this device should shift to an earlier date telephone set and connect and cut off phone Machine the tinkle of bells signal, after the signal of telecommunication entered this device, this device should send ring-back to the calling party immediately Signal makes the calling party receive nobody information of connecing of a other side, and does not think that the callee does not connect electricity Words;

3, time-delay shutdown, under the callee does not answer the call situation, automatic behind the continuity certain hour Shutdown;

4, when the callee plucked microphone and answers, this device was answered automatic shutdown;

5, when general calling object is called, the acousto-optic signal shows;

6, when code signal is failed, can pick up, and output one behind the coding of decoding, translate Control signal, it is aobvious to distinguish acousto-optic in the mode different from general calling object acousto-optic demonstration Show, as the calling object show red light, special calling increases and shows green light and the tinkle of bells that sounds, Important special object also can increase an amber light again and show.

This device can install a circuit board additional at the plain old telephone machine and realize, also can be loaded on separately one Individual etui is in parallel the use on telephone set, and this device is provided with switch, can realize with telephone set also Machine is connected and is torn office open and close.

Accompanying drawing provides the circuit structure diagram of an embodiment of the utility model.It can be divided into A, B, four parts of C, D.

A, start-up circuit and polar protective circuit: by K switch ₁, capacitor C ₁, electric bridge ZQ ₁, ZQ ₂With solid state relay SSR ₁Form.K switch ₁When placing on-position, this device is parallel to telephone set, and when the people made a phone call, the ring signal was through C ₁, ZQ ₁, SSR ₁Control end (1,2) forms loop, SSR ₁Load end (3,4) is connected, and electric current is through J ₁Normally closed touching close 1,2 and connect ZQ ₂, install other circuit part by ZQ2 to this and provide+direct current about 8V.

B, pressurizer and shutdown control circuit: by three terminal regulator IC ₂(7805) and pluck the microphone automatic shutdown circuitry and the time-delay automatic shutdown circuitry is formed.

Input 1 pin of three terminal regulator is+8V, through L ₁With ZQ ₁Anodal 3 join, and output 3 pin are+5V to connect follow-up each several part circuit, 2 pin ground connection.

Relay J ₁, triode Q ₁, Q ₂, resistance R ₂, R ₃, diode D ₁, D ₂Constitute and pluck microphone automatic shutdown circuitry, Q ₁, Q ₂Grounded emitter, Q ₁Collector electrode meets J ₁4, J ₁5 meet IC ₂1 pin, R ₂Be Q ₁Biasing resistor be again Q simultaneously ₂Load resistance.D ₂, D ₁, R ₃Connected mode constitute Q ₂Biasing circuit, select D ₂And R ₃Parameter cause Q by change in voltage can accomplish to pluck microphone the time ₂By Q ₁Saturation conduction, J ₁Action power dump and shutting down.

IC ₁Be 555 time-base circuits, it and R ₄, C ₂, C ₃, D ₃Constitute delay circuit, select R ₄And C ₂Parameter to make delay time be about 55 seconds, work as delay arrival time, IC ₁Output 3 pin become electronegative potential by high potential, and pass through D ₃Be added to Q ₂Base stage, make Q ₂End Q ₁Conducting, J ₁The action and shut down.

C, code signal pick up preposition amplification and decipher coding circuit:

By inductance coil L ₁And resistance R ₁Be connected on ZQ after the parallel connection ₂3 pin and IC ₂1 pin between form impedance and pick up code signal.Under no independent power supply situation by C ₄, R ₅, C ₅, R ₆, R ₇, Q ₃Form pre-amplification circuit code signal is amplified, the code signal after the amplification passes through C ₆Transfer to decoding circuit.

Decoding circuit is by IC ₃With crystal oscillator ZX and resistance R ₈Constitute.IC ₃Select for use UM9203 also can select MCl45436 or YM9101 for use.ZX and R ₈Be connected to IC ₃11,12 pin, IC ₃2,3,4,6,8 pin meet IC ₂3 pin, 10 pin ground connection, four data output 1,18,17,16 pin respectively with decoding circuit IC ₄(MC4514) address end 2,3,21,22 pin connect, to IC ₄Export four hexadecimal codes.

IC ₄And IC ₅, IC ₆(being CD4013) and resistance R ₉, capacitor C ₇Constitute and translate coding circuit.IC ₄1,24 pin meet IC ₂3 pin, 12,23 pin ground connection, other each pin are output.IC ₅, IC ₆6,7,8 pin ground connection, 14 pin meet IC ₂3 pin.IC ₅5 pin meet IC ₂3 pin, 1,9 pin connect.R ₉And C ₇Be the reset circuit of latch cicuit, R ₉And C ₇All and IC ₅, IC ₆4,10 pin link to each other R ₉Other end ground connection, C ₇Another termination IC ₂3 pin.

16 hexadecimal codes enter IC ₄After be interpreted into 16 decimal numbers and corresponding one by one output, with the positive pulse of the output output of decimal number correspondence as IC ₅, IC ₆Clock signal.IC ₅, IC ₆Aligning the potential data line carries out serial and latchs the purpose that has reached coding, IC ₅, IC ₆3,11 pin be input end of clock, according to the coding respectively with IC ₄Output be connected.The coding back is from IC ₆Three password positive pulse signals of 5 pin output, from IC ₆Four password positive pulse signals of 1 pin output.

D, output circuit: according to having or not ring-back sound equipment output circuit, sound and light show circuit (during no password) and cipher control acousto-optic after cipher control can be divided connection to distinguish three kinds of display circuits.Present embodiment provides following several physical circuit:

One of light display output circuit is by the diode D that glows ₆And resistance R ₁₁Form D ₆Positive pole meets IC ₂3 pin, negative pole passes through R ₁₁Ground connection.This circuit is controlled by start-up circuit, system's power supply after start-up circuit starts, D ₆The expression that glows has general calling object to call.

Light shows two of transmission of electricity road, by D ₅, R ₁₀, D ₇, R ₁₂, Q ₄The switching circuit control of forming.When circuit start and one-level (three) password input is arranged, this moment IC ₆5 pin provide high potential by output II, pass through D ₅Make Q ₄Conducting makes D ₇(green) is luminous, and expression has the special object of grasp one-level (three) password to phone.

Three of light display output circuit is by D ₉, R ₁₃, Q ₅, R ₁₄, D ₈The switching circuit control of forming.When circuit start and secondary (four) password input is arranged, IC ₆1 pin provide high potential by output III and pass through D ₉Make Q ₅Conducting makes D ₈(yellow) is luminous, and expression has the more importantly special object of grasp secondary (four) password to call.

Ring-back sound equipment output circuit is by R ₁₉And D ₁₀Form the 3V pressurizer and give musical film IC ₇Power supply, R ₁₉One termination IC ₂3 pin, the other end and voltage stabilizing didoe D ₁₀Negative pole be connected to IC after connecting ₇3,4 pin, IC ₇1 pin ground connection, IC ₇2 pin be signal output part and C ₈Negative pole is connected.Q ₇, R ₁₈, R ₁₇, C ₈(electrochemical capacitor) forms message output circuit, R ₁₈Be Q ₇Biasing resistor, R ₁₇Be the size of emitter current feedback resistance control output, Q ₇Collector electrode meet IC ₂3 pin.After this device start-up circuit starts, IC ₇Send backward signalling and pass through C ₈Enter Q ₇Base stage is given telephone line and is made the side of making a phone call hear the ringback tone of " pout--, toot--" through amplifying rear feed.D ₄, R ₁₅, Q ₆, R ₁₆, Y forms the sound control circuit of this device, it constitutes the complete sound display output circuit of this device together with above-mentioned ring-back sound equipment output circuit, after one-level (three), the input of secondary (four) password, IC ₆12 pin provide a negative potential by output I and pass through D ₄Make Q ₆Conducting, sounding component Y sends the tinkle of bells.The feature of this circuit is: circuit is once power supply, send backward signalling to telephone line immediately, and when one-level (three), the input of secondary (four) password, this device sounding component Y just sends sound, this sound with green glow (three passwords), gold-tinted (four passwords) constitutes acousto-optic display reminding owner has special object to call.

Claims (5)

1, a kind of phone Sai Laikete (selector) that carries out acousto-optic difference demonstration by the input password automatically, it is characterized in that: circuit is by constituting with the lower part:

A, startup and polar protective circuit: by K switch ₁, capacitor C ₁, electric bridge ZQ ₁, ZQ ₂, solid state relay SSR ₁Form; K switch ₁Input 1,2 answer the call respectively line M, L, output 3 passes through C ₁Meet ZQ ₁1, output 4 meets ZQ ₁2, ZQ ₁3,4 meet SSR respectively ₁1,2, constitute to start the loop thus; ZQ ₂1 connect K switch ₁Output 3, ZQ ₂2 pass through J ₁Normally-closed contact 2,1, SSR ₁Normally opened contact 3,4 after take back K switch ₁Output 4 constitutes polar protective circuit thus; ZQ behind polarity protection ₂3 be permanent anodal to the each several part circuit supply, be connected ZQ with follow-up each circuit ₂4 be that negative pole is connected with ground wire;

B, pressurizer and shutdown control circuit: by three terminal regulator IC ₂Microphone shuts down automatically and the time-delay automatic shutdown circuitry is formed with plucking; IC ₂Input 1 pin passes through L ₁With ZQ ₂Anodal 3 are connected, and output 3 meets follow-up each several part circuit anode, IC ₂2 pin ground connection;

Relay J ₁, triode Q ₁, Q ₂, resistance R ₂, R ₃, diode D ₁, D ₂Constitute and pluck the microphone automatic shutdown circuitry; Its circuit structure is Q ₁, Q ₂Grounded emitter, Q ₁Collection meet J by the utmost point ₁4, J ₁5 meet IC ₂1 pin, R ₂Be Q ₁Biasing resistor be again Q simultaneously ₂Load resistance, R ₂One termination IC ₂1 pin, the other end and Q ₁Base stage, Q ₂Collector electrode connect; D ₂, D ₁, R ₃Connect and compose Q ₂Biasing circuit, D ₂Negative pole meets IC ₂1 pin, D ₂Positive pole meets R ₃Back and Q ₂Base stage link to each other D ₁Positive pole meet D ₂, R ₃Node, D ₁Minus earth;

Time-base circuit IC ₁With R ₄, C ₂, C ₃, D ₃Constitute the time-delay automatic shutdown circuitry, IC ₁4,8 pin meet IC ₂3 pin, 1 pin ground connection meets C after 2,6 pin connect ₂, R ₄, C ₂Other end ground connection, R ₄Another termination IC ₂3 pin, IC ₁5 pin through C ₃Back ground connection, IC ₁Output 3 pin pass through D ₃With Q ₂Base stage is connected;

C, code signal pick up preposition amplification and decipher coding circuit

By inductance coil L ₁And resistance R ₁Be connected on ZQ after the parallel connection ₂3 pin and IC ₂1 pin between form impedance and pick up code signal, under no independent power supply situation by C ₄, R ₅, C ₅, R ₆, R ₇, Q ₃The pre-amplification circuit of forming amplifies code signal, and the code signal after the amplification passes through C ₆Transfer to decoding circuit;

Decoding circuit is by IC ₃With crystal oscillator ZX and resistance R ₈Constitute; Translate coding circuit by IC ₄And IC ₅, IC ₆And resistance R ₉, capacitor C ₄Constitute; Decoding circuit, translate coding circuit at three terminal regulator IC ₂Provide under the situation of power supply, code signal by pre-amplification circuit through C ₆Input decoding circuit decoding is sent into and is translated coding circuit and encode, latch, and distinguishes display circuit conveying control signal by preset coding requirements to the cipher control acousto-optic;

D, output circuit: be made up of ring-back sound equipment output circuit, sound and light show circuit and cipher control acousto-optic difference display circuit, three-circuit is by IC ₂Power supply is provided,

A, by musical film IC ₇Provide backward signalling, by R ₁₉And D ₁₀Form pressurizer and give musical film IC ₇The coupling power supply, R ₁₉One termination IC ₂3 pin, the other end and voltage stabilizing didoe D ₁₀Negative pole be connected to IC after connecting ₇3,4 pin, D ₁₀Positive pole, IC ₇1 pin ground connection, IC ₇2 pin be that signal output part is through C ₈After meet Q ₇Base stage; R ₁₈Be Q ₇Biasing resistor, R ₁₇Be the size of emitter current feedback resistance control output, Q ₇Collector electrode meet IC ₂3 pin, IC ₇The signal that sends passes through C ₈Enter Q ₇Base stage is given telephone line through the amplification rear feed and is made the other side who makes a phone call hear ringback tone;

B, sound and light show circuit are at IC ₂Power supply is direct-connected acousto-optic display element and circuit composition down;

C, cipher control acousto-optic difference display circuit are at IC ₂Power supply is made up of decipher coding circuit control signal output ends connection acousto-optic display element and circuit down, and the concrete form of this acousto-optic demonstration is different from the acousto-optic demonstration concrete form of b circuit.

2, phone Sai Laikete according to claim 1 (selector) is characterized in that: in output circuit:

B, sound and light show circuit are the light display circuit, and it constitutes, the diode D that glows ₆Positive pole meet IC ₂3 pin, negative pole meets R ₁₁Back ground connection;

C, cipher control acousto-optic difference display circuit are the sound display circuit, and it constitutes: by R ₁₉, D ₁₀Form pressurizer and musical film IC ₇The coupling power supply, R ₁₉One termination IC ₂3 pin, the other end and voltage stabilizing didoe D ₁₀Negative pole and IC ₇3,4 pin connect D ₁₀Positive pole and IC ₇1 pin ground connection, IC ₇2 pin be signal output part and C ₈Be connected to Q after the connection ₇Base stage; Q ₇, R ₁₈, R ₁₇, C ₈Form audio amplification circuit, R ₁₈Be Q ₇Biasing resistor, R ₁₇Be emitter current feedback resistance, Q ₇Collector electrode meet IC ₂3 pin; D ₄, R ₁₅, Q ₆, R ₁₆, Y forms cipher control Stereo Switch circuit, Q ₆Base stage meet D ₄Positive pole and R ₁₅, D ₄Negative pole meet the code signal output I of decipher coding circuit, R ₁₅Other end ground connection; Q ₆Emitter pass through R ₁₆After meet Y, another termination Q of Y ₇Emitter, Q ₆Grounded collector; When code signal output I provides a negative potential, Q ₆Conducting, Y sends the tinkle of bells.

3, phone Sai Laikete according to claim 2 (selector) is characterized in that: in output circuit:

C, cipher control acousto-optic difference display circuit also have the light display circuit of green light except that the sound display circuit, it is by D ₅, R ₁₀, D ₇, R ₁₂, Q ₄Form the diode D of green light ₇Positive pole meet IC ₂3 pin, negative pole meets R ₁₂Back and Q ₄Collector electrode link to each other Q ₄Grounded emitter, decipher coding circuit code signal output II inserts D ₅Negative pole, D ₅Positive pole and R ₁₀Ground connection after joining, Q ₄Base stage be connected on D ₅With R ₁₀On the node, when code signal, output II provides a high potential, passes through D ₅Make Q ₄Conducting, D ₇Green light shows.

4, phone Sai Laikete according to claim 3 (selector) is characterized in that: in output circuit:

C, cipher control acousto-optic difference display circuit by the two-stage password respectively display circuit constitute, the level password display circuit be the light display circuit of display circuit and green light; Secondary password display circuit is the light display circuit of jaundice light, and it is by D ₉, R ₁₃, Q ₅, R ₁₄, D ₈Form the diode D of jaundice light ₈Positive pole meets IC ₂3 pin, negative pole polyphone R ₁₄After meet Q ₅Collector electrode, Q ₅Grounded emitter, the secondary code signal output III of decipher coding circuit meets D ₉Positive pole, D ₉Negative pole polyphone R ₁₃Back ground connection, Q ₅Base stage be connected on D ₉, R ₁₃Node on.

5, phone Sai Laikete according to claim 1 (selector) is characterized in that: IC in the decoding circuit ₃Model is UM9203, or MC145436 or YM9101; Translate IC in the coding circuit ₄Model is MC4514; IC ₅, IC ₆Model is CD4013.

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