CN2907112Y

CN2907112Y - User interface circuit device

Info

Publication number: CN2907112Y
Application number: CN 200620059547
Authority: CN
Inventors: 徐国才
Original assignee: Individual
Current assignee: SHENZHEN KILO-X ELECTRONIC Co Ltd
Priority date: 2006-05-23
Filing date: 2006-05-23
Publication date: 2007-05-30
Anticipated expiration: 2016-05-23

Abstract

The utility model relates to a device of user interface circuit device, which is composed of a constant current source, an audio frequency two / four transfer circuit and a ring and reverse pole circuit connected with the audio frequency two / four transfer circuit. The ring and the reverse pole circuit is composed of a first electric switch, a second electric switch and a ring oscillator controlling the first electric switch and the second electric switch, the audio frequency two / four transfer circuit is connected with the first electric switch and the second electric switch, and the constant current source is connected with the first electric switch and the second electric switch. Because a new circuit design is adopted, and a semiconductor element is used to fulfill the ring and reverse pole function, the traditional relay is cancelled, the cost is low and the circuit is simple.

Description

The user interface circuit device

Technical field

The utility model relates to a kind of mechanics of communication, is meant a kind of user interface circuit device especially.

Background technology

User interface circuit is a kind of very important circuit unit in the current communication apparatus, the principle of traditional user interface circuit device as shown in Figure 2, the implementation of its ring is: external ringing-current source also adopts relay to switch; The implementation of antipole is: switch with a relay again.

Though this mode is classical, reliable, volume is big, the cost height is insurmountable contradiction.Because relay belongs to inductance component, it can't compare with semiconductor components and devices aspect volume and cost.

As the another kind of circuit that is disclosed for Chinese utility model patent ZL02271472.3 number, though it has adopted components and parts with low cost, because its structure limitation still has the following disadvantages:

Owing to when ring, need external square-wave signal source to make the user can feel succinct inadequately and convenient;

Owing to adopt direct coupling system between audio frequency two/four conversion and the feeding circuit, it is not too desirable causing its line longitudinal balance index, common-mode rejection ratio index, interference free performance; And, because it is high to adopt direct coupling system that the components and parts symmetry is required at this special occasions of user interface circuit, cause its implementation almost can only adopt the technology of this higher cost of thick film, offset components and parts cost that should be cheap.

The utility model content

Technical problem to be solved in the utility model is: a kind of user interface circuit device is provided, and its built-in ringing-current and antipole circuit, circuit is more succinct.

For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of user interface circuit device is provided, it comprises constant-current source, audio frequency two/four translation circuits and the ring and the antipole circuit that are connected with described audio frequency two/four translation circuits, described ring and antipole circuit comprise first electronic switch, second electronic switch and be used to control described first electronic switch, the ringing generator of second electronic switch, described audio frequency two/four translation circuits connect described first electronic switch and second electronic switch, and described constant-current source connects described first electronic switch and second electronic switch.

The beneficial effects of the utility model are: owing to adopted new circuit design, thereby finish ring and the antipole function has been cancelled traditional relay by semiconductor device comprehensively, owing to increased ringing current generator in the circuit, make circuit more succinct.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Description of drawings

Fig. 1 is the utility model user interface circuit manipulated or operated apparatus.

Fig. 2 is existing user interface circuit manipulated or operated apparatus.

Embodiment

As shown in Figure 1, the utility model provides a kind of user interface circuit device, be widely used in various telephone exchanges, dispatcher, sound card, access device (as VOIP) etc., it comprises ring and antipole circuit 1, off-hook detection circuit 2, two constant-

current sources

3,4, audio frequency two/four conversion 5 and transformer T, and described ring and antipole circuit comprise first electronic switch, second electronic switch and ringing generator.

Described first electronic switch is made of triode Q1, Q3, Q6, and described triode Q1 is the positive-negative-positive triode, and triode Q3 is a NPN type triode, and Q6 is a NPN type triode; The emission collection of described triode Q1 is connected to power supply VCC, and collector electrode is connected to the base stage of described triode Q3 by resistance R 5, and is connected to the base stage of triode Q6 by resistance R 8; The collector series connection constant-current source of described triode Q3 is exported by SHK after the off-hook index signal is taken a sample from above-mentioned constant-current source to RGND; The emission collection of described triode Q6 connects constant-current source, and collector electrode connects TEL2 interface signal end.

Described second electronic switch is made of triode Q2, Q4, Q5, and described triode Q2 is the positive-negative-positive triode, and triode Q4 is a NPN type triode, and triode Q5 is a NPN type triode; The emission collection of described triode Q2 meets power supply VCC, and the emission collection connects the base stage of triode Q4 by resistance R 6; The collector electrode of described triode Q4 meets off-hook index signal SHK after connecing series connection constant-current source and off-hook detection circuit, and the emitter of described triode Q4 connects the collector electrode of triode Q6; The base stage of described triode Q5 connects the collector electrode of triode Q2 by resistance R 7, and connects feed circuit by resistance R 9 and R12, and the emission collection connects feed circuit by resistance R 12, the emission collection of collector connecting transistor Q3, and connect TEL1 interface signal end.Connect between the emission collection of the collector electrode of described triode Q4 and triode Q6 described transformer T and capacitor C, described TEL1 interface signal end and TEL2 interface signal end are coupled to audio frequency two/four translation circuits by described transformer T, and audio frequency two/four translation circuits have four-wire interface VR, VX.

Described ringing generator is used for controlling above-mentioned first electronic switch and second electronic switch and makes it form push-pull relationship by forming with-not gate UB and UC, capacitor C 1 and C2, resistance R 1 and R2.A described input 4 with-not gate UB meets antipole control signal FR, and another input 5 connects capacitor C 1 back ground connection, and output 6 connects the base stage of triode Q1; Connect output 6 with-not gate UB with the input 9 of-not gate UC, another input 10 connects input 5 with-not gate UB by resistance R 2, R1, output 8 is connected to node between resistance R 1, the R2 by capacitor C 2, also connects the base stage of triode Q2 by resistance R 4.Describedly also connect the anode of diode D2 with the-input 5 of not gate UB, the negative electrode of described diode D2 meets power supply VCC; Described input 4 also connects the negative electrode of diode D1, and the anode of described diode D1 connects the output 3 with-not gate UA; A described input 2 with-not gate UA meets off-hook index signal SHK, and another input 1 meets ring control signal RC.This ringing generator by with-not gate UA, UB be controlled by ring control signal RC, antipole control signal FR, off-hook index signal SHK and finish ring dexterously, cut bell, feed, antipole function.Specifically describe as follows:

1, ring

Condition: SHK=1, RC=1, FR=1.

At this moment, the oscillator of forming with-not gate UB and UC, capacitor C 1 and C2, resistance R 1 and R2 respectively with-not gate UB the 6th pin and with-anti-phase each other 25HZ the square wave of not gate UC the 8th pin output.Suppose a certain moment and-not gate UB the 6th pin output high level, so with the just certain output low level of-not gate UC the 8th pin, by resistance R 3 and R4 control, make triode Q1 conducting, triode Q2 ends, thereby, triode Q3, Q6 conducting simultaneously, triode Q4, Q5 end simultaneously, TEL1 interface=RGND, TEL2 interface=VBAT; In like manner, suppose another constantly with-not gate UB the 6th pin output low level, with the just certain output high level of-not gate UC the 8th pin, by resistance R 3 and R4 control, triode Q1 ends so, triode Q2 conducting, thereby triode Q3, Q6 end simultaneously, triode Q4, Q5 conducting simultaneously, TEL1 interface=VBAT, TEL2 interface=RGND; So go round and begin again, the phone that is connected on TEL1 interface, TEL2 interface two ends outward just can ring.

2, cut bell

Condition: as long as also have only TEL1 interface, the external receiver off-book in TEL2 interface two ends, SHK=0.

At this moment, because with-not gate UA nand function and diode D1 clamping action, with the oscillator failure of oscillations that-not gate UB and UC, capacitor C 1 and C2, resistance R 1 and R2 form, TEL1 interface and TEL2 interface will be fixed on RGND or VBAT, promptly cut bell.

3, feed

Condition: RC=0.

At this moment, because with-not gate UA nand function and diode D1 clamping action, RC=0 is equal to SHK=0.In other words, with the oscillator failure of oscillations that-not gate UB and UC, capacitor C 1 and C2, resistance R 1 and R2 form, TEL1 interface and TEL2 interface will be fixed on RGND or VBAT.It is feed.

4, antipole

Condition: RC=0 or SHK=0.

At this moment, must be feed condition.When FR=0 or FR=1, polarity of voltage can be just in time reverse between TEL1 interface, the TEL2 interface, i.e. antipole.

The off-hook detection circuit is finished normal dislodging machine testing function, and it can also can use transistor with photoelectric device, and the utility model does not launch to describe because of having no special requirements and improving.

Constant-current source circuit provides low impedance path to DC feedback, and audio signal is played buffer action.Generally the transistor circuit by classics constitutes, and the utility model does not launch to describe because of having no special requirements and improving.

Audio frequency two/four translation circuits are finished the mutual conversion of two wires and four lines, are commonly called as hybrid circuit.The utility model lay special stress on is finished coupling with transformer T and capacitor C, adopts traditional or existing mature technology get final product as for the hybrid circuit internal structure, because of having no special requirements and improving, does not launch description.

Claims

1, a kind of user interface circuit device, it comprises constant-current source, audio frequency two/four translation circuits and the ring and the antipole circuit that are connected with described audio frequency two/four translation circuits, it is characterized in that: described ring and antipole circuit comprise first electronic switch, second electronic switch and are used to control the ringing generator of described first electronic switch, second electronic switch, described audio frequency two/four translation circuits connect described first electronic switch and second electronic switch, and described constant-current source connects described first electronic switch and second electronic switch.

2, user interface circuit device as claimed in claim 1, it is characterized in that: described first electronic switch is made of triode Q1, Q3, Q6, the emission collection of described triode Q1 is connected to power supply, collector electrode is connected to the base stage of described triode Q3 by a resistance R 5, and is connected to the base stage of triode Q6 by resistance R 8; The collector series connection constant-current source of described triode Q3 is to RGND, and the off-hook index signal is taken a sample the back by SHK output from above-mentioned constant-current source, and the collector electrode of described triode Q3 also connects two/four translation circuits; The emission collection of described triode Q6 connects constant-current source.

3, user interface circuit device as claimed in claim 2 is characterized in that: described triode Q1 is the positive-negative-positive triode, and triode Q3 is a NPN type triode, and Q6 is a NPN type triode.

4, user interface circuit device as claimed in claim 3 is characterized in that: described second electronic switch is made of triode Q2, Q4, Q5, and the emission collection of described triode Q2 connects power supply, and the emission collection connects the base stage of triode Q4 by resistance R 6; The collector electrode of described triode Q4 connects the off-hook index signal after connecing the series connection constant-current source, and the collector electrode of described triode Q4 also connects described two/four translation circuits, and the emitter of described triode Q4 connects the collector electrode of triode Q6; The base stage of described triode Q5 connects the collector electrode of triode Q2 by resistance R 7, and the emission collection connects constant-current source and two/four translation circuits, the emission collection of collector connecting transistor Q3.

5, user interface circuit device as claimed in claim 4, it is characterized in that: described ringing generator is by forming with-not gate UB and UC, capacitor C 1 and C2, resistance R 1 and R2, being used for controlling above-mentioned first electronic switch and second electronic switch makes it form push-pull relationship, described first input end with-not gate UB meets antipole control signal FR, the second input termination capacitor C, 1 back ground connection, the base stage of output termination triode Q1; Connect output with-not gate UB with the first input end of-not gate UC, second input connects second input with-not gate UB by resistance R 2, R1, output is connected to node between resistance R 1, the R2 by capacitor C 2, also connects the base stage of triode Q2 by resistance R 4.Describedly also connect the anode of diode D2 with-second input of not gate UB, the negative electrode of described diode D2 connects power supply; Described first input end also connects the negative electrode of diode D1, and the anode of described diode D1 connects the output with-not gate UA; Described first input end with-not gate UA connects the off-hook index signal, the second input termination ring control signal.

6, as claim 4 or 5 described user interface circuit devices, it is characterized in that: the described transformer of connecting between the emission collection of the collector electrode of described triode Q4 and triode Q6, and be coupled to described two/four translation circuits by described transformer T.

7, user interface circuit device as claimed in claim 6 is characterized in that: the capacitor C of connecting between the emission collection of described transformer and described triode Q6.