CN2190838Y

CN2190838Y - Improved radio telephone set

Info

Publication number: CN2190838Y
Application number: CN93211981U
Authority: CN
Inventors: 林保雍
Original assignee: SHENNAO ENTERPRISES DEVELOPMENT Co Ltd
Current assignee: SHENNAO ENTERPRISES DEVELOPMENT Co Ltd
Priority date: 1993-05-06
Filing date: 1993-05-06
Publication date: 1995-03-01
Anticipated expiration: 2003-05-06

Abstract

The utility model relates to an improved radio telephone set which comprises a main telephone and an accessorial telephone, wherein, the main telephone is provided with a guide signal detection unit which is matched with a buffer and a decoding unit to transmit an accessorial telephone signal together with the cipher to a machine opening and closing signal control unit to control an office line control unit; the main telephone is also provided with a ringing detection unit or a calling switch; the ringing detection unit and the calling switch are respectively connected with a call generating unit to make the call generating unit send an oscillation signal, and the signal frequency is selected by a call selecting unit. The accessorial telephone makes a machine opening index signal sent continuously through an index signal generating circuit and controls the broken line through a broken-line control circuit.

Description

Improved radio telephone set

The utility model is about radiophone, is meant a kind of radiophone that improves mechanical stability against short circuit and can prevent to produce interference and misoperation especially.

Radiophone partly need not to use lead owing to its handset, thereby greatly increases the mobility of its use.Recently more because of it has multiple function, thereby make the use of radiophone more extensive.

But the existing radio phone has multiple shortcoming, for example, and the less stable of machine tool its start index signal when start.When the handset desire is done the interior lines intercommunication, then often have and pipe without reason or produce the cross-talk phenomenon with outside line.And no matter machine tool or handset are called out or when the bell of coming is arranged transmitting, and more regular meeting has to produce and disturbs and shortcoming such as misoperation.

Therefore, main purpose of the present utility model is to provide a kind of improved radiophone.It is made of a machine tool and a handset, and this machine tool is by index signal testing circuit, buffer and a decoding circuit, makes the handset use of must could starting shooting when transmitting the password identical with machine tool, thereby can prevent robber group; And handset and machine tool all use selectable three different frequencies, and the interference of the jingle bell without reason can prevent non-own phone the time; And the dynamo-electric words of group can't be put through or when needing start dialing again, then controlled by a broken string control circuit.

A kind of modified form radiophone comprises a machine tool and a handset, and this handset movably is set up on the pedestal of machine tool shell, wherein,

Described machine tool comprises:

The receive path part;

The transmission channel part;

Operation, control and power unit;

Described handset comprises:

The receive path part;

The transmission channel part;

Operation, control and power unit;

It is characterized in that,

Described machine tool also comprises:

Index signal detecting unit, buffer unit, pulse dialing control unit, jingle bell detecting unit, decoding unit, switching on and shutting down signaling control unit, exchange line control unit, calling selected cell, challenge switch unit, calling generation unit, they are connected with the correlation unit of described transmission channel part, receive path part and operation, control and power unit, and also corresponding each other connection;

Described handset also comprises:

Jingle bell generation unit, jingle bell amplifying unit, low-voltage detecting unit, calling selected cell, broken string control unit, coding unit and index signal generation unit; They are connected with the correlation unit of power unit with described transmission channel part, receive path part and operation control, and also corresponding each other connection;

Described machine tool is by described index signal detecting unit and described buffer and will deliver to described decoding unit together with the handset starting-up signal that password transmits; Described decoding unit is delivered to described switching on and shutting down signaling control unit with signal, to control described exchange line control unit, thereby make described index signal detecting unit can send a signal to described pulse dialing control unit, thereby obtain anti-phase output, so that provide default relay voltage, make exchange line keep connecting; Send into voltage to described switching on and shutting down signaling control unit simultaneously and become a lock-in circuit; The described jingle bell detecting unit and the described challenge switch unit of this machine tool are connected to described calling generation unit, make this calling generation unit send oscillator signal, and its signal frequency is then selected from a class frequency by described calling selected cell; The audio signal that described handset selects the fm demodulation circuit by the second mixing fm demodulation unit in the described receive path part to detect by described calling selected cell, thereby and produce jingle bell by described jingle bell generation unit; In this handset in addition by described low-voltage detecting unit to control an indicator light so that pilot cell voltage; This handset is also launched so that start and index signal are lasting by described index signal generation unit, and pass through described broken string control unit with the control broken string, thereby when the cancel key on the hand keypad, a pulse be can send to described coding unit, shutdown and start again realized by described index signal generation unit.

Other purposes of the present utility model, characteristics and effect will cooperate the detailed description of the following drawings embodiment and be understood, as shown in the figure:

Fig. 1 is a machine tool embodiment block diagram of the present utility model.

Fig. 2 a-2d is the circuit diagram of Fig. 1.

Fig. 3 is a handset embodiment block diagram of the present utility model.

Fig. 4 a-4d is the circuit diagram of Fig. 3.

See also Fig. 1 and 2 a-2d, the circuit diagram among the latter is corresponding with the machine tool circuit block diagram of Fig. 1.Similar with the machine tool of general radiophone, machine tool of the present utility model comprises: (one) is as receive path part: band-pass filter unit 101, radio frequency amplifying unit 102(Q101) (annotate: each circuit unit numbering (as, numbering 102 herein) in Fig. 2 a-2d, be corresponding with Fig. 1, parantheses after the numbering and content thereof (as, (Q101) herein) represent the concrete electronic device of this circuit unit in Fig. 2 a-2b, assembly or parts etc., for example, represent transistor with Q, represent integrated package with IC, represent switch with SW, or the like), mixing unit 103(Q102), intermediate frequency filtering unit 104(FL101), the second mixing fm demodulation unit 105(X101, IC101), emitter follower unit 106(Q103), band stop filter unit 107(L104), audio amplification unit 108(Q112, Q113), local oscillations unit 110(Q104, X102); (2) as transmission channel part: the sound amplifying unit 126(Q111 of office), low pass filter unit 127, power amplification unit 128(Q114), frequency tripling amplifying unit 129(Q115), oscillating unit 130(Q116, X103), modulating unit 131(D111); (3) as operation, control and power unit: external power source input unit 109(JK101), band-pass filter unit 112(IC102A, T108), exchange line switch fabric unit 113(OP101, OP102), power supply voltage regulation unit 114(IC105), emission power control unit 115(Q109, Q110), battery 119 etc.The general work process of these circuit all is known, and their interconnected relationship has been represented fully aware ofly in Fig. 1 and Fig. 2 a-2d and detailed, therefore repeat no more, below mainly be described in detail in the machine tool and realize relevant circuit and its process of working of the utility model purpose.

Machine tool of the present utility model also includes: index signal detecting unit 111(IC103), buffer unit 116(IC102B, Q105), pulse dialing control unit 117(IC102C, Q106, Q108), jingle bell detecting unit 118(IC106), decoding unit 120(IC104), switching on and shutting down signaling control unit 121(IC102D), exchange line control unit 122(Q107, RL), call out selected cell 123(SW101), challenge switch unit (SW201), call out generation unit 125(IC102E, IC102F).Their annexations in the machine tool circuit as shown in the figure.When sending a signal to machine tool when the handset start, the IC circuit 103(of the index signal detecting unit 111 of machine tool sees also the lower right of Fig. 2 a) when to detect index signal be identical, its terminal 8(PIN8) becomes the LOW(low level), thereby IC102B(Fig. 2 c of controller buffer unit 116) make it anti-phase, and control Q105 makes its conducting, but this moment is because of there being password to transmit simultaneously, so the terminal 4(PIN4 of the IC circuit 104 of decoding unit 120) receive password, when password is identical, send out a Hi(high level by its terminal 5 (PIN5)) signal is to IC circuit 102D(Fig. 2 c of switching on and shutting down signaling control unit 121), this circuit output is anti-phase, thereby the Q107 of the circuit of control office line traffic control unit 122 makes it conducting, while is at the terminal 8(PIN8 of the IC circuit 103 of index signal detecting unit 111) locate, process R127 and D101 transmit signals to IC circuit 102C(Fig. 2 c of pulse dialing control unit 117), make its anti-phase and output Hi(high level), thereby control the Q106 of this unit 117, the Q108 conducting, and the relay R L voltage of supply exchange line control unit 122, exchange line is connected.The D103 of pulse dialing control unit 117 send the IC circuit 102D of voltage to switching on and shutting down signaling control unit 121 again, make it become a lock-in circuit, relay R L continues to connect, and signal is delivered to the circuit of emission power control unit 115 by the D105 of switching on and shutting down signaling control unit 121.

When coming the bell signal, the IC circuit 106 of control jingle bell detecting unit 118, making the D112 negative pole is the LOW(low level), or to make the D112 negative pole by the push-button switch SW201 of challenge switch unit 124 be the LOW(low level), this moment is by the IC circuit 102E that calls out generation unit 125, the circuit that F forms produces oscillator signal, frequency of oscillation is selected wherein one group by the circuit of calling out selected cell 123 and toggle switch SW101, and adjust each variable resistance VR105,106 or 107 to make frequency be 700 hertz, 850 hertz or 1000 hertz, thus output signal is delivered to emission modulating stage (that is: modulating unit 131).

See also Fig. 3 and 4a-4d, the circuit diagram among the latter is corresponding with the handset circuit block diagram of Fig. 3.Similar with the handset of general radiophone, handset of the present utility model comprises: (one) is as the receive path part: band-pass filter unit 301, radio frequency amplifying unit 302(Q101), mixing unit 303(Q102), intermediate frequency filtering unit 304(FL103), local oscillations unit 308(Q105, X101), the second mixing fm demodulation unit 305(X102, IC102) and audio amplification unit 311(IC103); (2) as transmission channel part: microphone amplifying unit 321(Q112), modulating unit 326(D107), oscillating unit 325(Q111, X104), frequency tripling amplifying unit 324(Q110), power amplification unit 323(Q109), low pass filter unit 322; (3) as operation, control and power unit: keyboard 312, battery 309, power switch unit 314(SW102), external power source input unit 315(JK201), single-tone/pulse dialing unit 316(IC105), control dialing unit 318(Q107) etc.The general work process of these circuit all is known, and their interconnected relationship has been represented fully aware ofly among Fig. 3 and Fig. 4 a-4d and detailed, therefore repeat no more, below mainly be described in detail in the handset and realize the relevant circuit and the course of work thereof of the utility model purpose.Handset of the present utility model also comprises: call out selected cell 310(SW101), jingle bell generation unit 306(IC101), jingle bell amplifying unit 307(Q103, Q104), low-voltage detecting unit 313(Q201, Q202, D202), broken string control unit 317(Q106), coding unit 319(IC104), index signal generation unit 320(Q108).Their annexations in handset as shown in the figure.During the handset standby, pressing CALL(when main frame calls out) during key, can send 700 hertz, frequency (selecting) among 850 hertz or the 1000 hertz of threes by switch, be sent to handset, after handset receives, fm demodulation IC circuit 102 audio detection signals by the second mixing fm demodulation unit 305, its circuit and toggle switch SW101 that calls out selected cell 310 selects 700 hertz, a frequency in 850 hertz or 1000 hertz, when it and machine tool Frequency Synchronization, control the IC circuit 101 generation jingle bells of jingle bell generation unit 306 by the IC102 of said units 305, the frequency that is produced is that the frequency multiplexed signal of 400 hertz and 20 hertz is through after synthetic, be sent to the circuit Q103 of jingle bell amplifying unit 307, Q104 makes audio frequency and amplifies, and delivers to loudspeaker SPK then.

Be provided with a low-voltage detecting unit 313 in the handset in addition, its circuit is made up of Q201, Q202, D202, and when cell voltage was sufficient, so Q201 conducting, and not conducting of Q202 were not conducting of D202.When cell voltage is lower than about 4.6V, not conducting of Q201, and the Q202 base voltage rises, thereby conducting, D202 minus earth, D202 have current flowing, thereby bright lamp, thus the pilot cell undertension.

Handset is when usual conversation, the circuit D108 of its index signal generation unit 320 makes the start index signal continue emission, press CANCEL(and cancel when going up by keyboard (being keyboard unit 312)) during key, the not conducting of circuit Q106 of broken string control unit 317, its collector electrode can't transmit the Q108 of voltage to index signal generation unit 320, thereby index signal generation circuit can't vibrate, the machine tool aphalangia draws signal and broken string, when hand is pressed the CANCEL(cancellation) when key is decontroled, the Q106 conducting of said units 317, collector electrode is sent the terminal 4(PIN4 of a pulse to the IC circuit 104 of coding unit 319), IC104 vibration this moment, by terminal 5(PIN5) send out the emitter of password to the Q108 of index signal generation unit 320, the control index signal produces circuit oscillation, and transmit signals to emission modulating stage (that is: modulating unit 326), realize shutdown and start again.

The utility model is when start, and handset need transmit the password identical with machine tool just can enter use, if the password difference of composite aircraft, the use of promptly can't starting shooting is dialled and can prevent to steal, and this is one of its advantage.In addition, handset and machine tool all use one of alternative three kinds of different frequencies, thereby can prevent jingle bell and the formed interference of non-own phone without reason.And the dynamo-electric words of group can't be put through or will dial again the time, then only need the CANCEL(cancellation on the keypad) the key dialing of can starting shooting again, need not to switch TALK(talks)/ON(opens)/OFF(closes) key, thereby can reduce province's switching on and shutting down time and required operation effectively, really be a quite practical modified form radiophone.

Claims

1, a kind of modified form radiophone comprises a machine tool and a handset, and this handset movably is set up on the pedestal of machine tool shell, wherein,

Described machine tool comprises:

Receive path part (101-108,110);

Transmission channel part (126-131);

Operation, control and power unit (109,112-115,119);

Described handset comprises:

Receive path part (301-305,308,311);

Transmission channel part (321-326);

Operation, control and power unit (309,312,314-316,318);

It is characterized in that,

Described machine tool also comprises:

Index signal detecting unit (111), buffer unit (116), pulse dialing control unit (117), jingle bell detecting unit (118), decoding unit (120), switching on and shutting down signaling control unit (121), exchange line control unit (122), call out selected cell (123), challenge switch unit (124), call out generation unit (125), they with described transmission channel part, receive path partly and the correlation unit of operation, control and power unit be connected and also corresponding each other connection;

Described handset also comprises:

Jingle bell generation unit (306), jingle bell amplifying unit (307), low-voltage detecting unit (313), calling selected cell (310) broken string control unit (317), coding unit (319) and index signal generation unit (320); They are connected with the correlation unit of described transmission channel part, receive path part and operation, control and power unit, and also corresponding each other connection;

Described machine tool is by described index signal detecting unit (111) and described buffer (116) and will deliver to described decoding unit (120) together with the handset starting-up signal that password transmits; Described decoding unit (120) is delivered to described switching on and shutting down signaling control unit (121) with signal, to control described exchange line control unit (122), thereby make described index signal detecting unit (111) can send a signal to described pulse dialing control circuit unit (117), thereby obtain anti-phase output, so that provide default relay voltage, make exchange line keep connecting; Send into voltage to described switching on and shutting down signaling control unit (121) simultaneously and become a lock-in circuit; The described jingle bell detecting unit (118) and the described challenge switch unit (124) of this machine tool are connected to described calling generation unit (125), make this calling generation unit (125) send oscillator signal, its signal frequency is then selected from a class frequency by described calling selected cell (123); The audio signal that described handset selects the fm demodulation circuit by the second mixing fm demodulation unit (305) in the described receive path part to detect by described calling selected cell (310), and by described jingle bell generation unit (306) thus produce jingle bell; In this handset in addition by described low-voltage detecting unit (313) to control an indicator light so that pilot cell voltage; This handset is also launched so that start and index signal are lasting by described index signal generation unit (320), and pass through described broken string control unit (317) with the control broken string, thereby when the cancel key on the hand keypad, a pulse be can send to described coding unit (319), shutdown and start again realized by described index signal generation unit (320).

2, modified form radiophone as claimed in claim 1 is characterized in that, wherein the output frequency of oscillation of handset and machine tool can be selected among 700 hertz, 850 hertz or 1000 hertz of threes.

3, modified form radiophone according to claim 1 is characterized in that, wherein the jingle bell that produces of the jingle bell generation unit of handset is the multiple frequency composite signal of 400 hertz and 20 hertz.