CN2121775U - Telephone automatic answer-back unit without magnetic tape - Google Patents

Abstract

The utility model discloses an automatic answering device of a telephone without a tape, which uses the synthesis technique of digital voice to replace the original magnetic recording method in an answering device of the telephone. When a ringing signal of the telephone is input and the automatic answering device of a telephone without a tape judges the calling is not answered, a speech synthesizer for leaving word of the called subscriber does the D/A conversion of the leaving word which is stored in a DRAM in advance and sends the leaving word to outside lines. Subsequently, a speech synthesizer for the leaving word of a calling subscriber samples the speech signals of the leaving word which is sent from the outside lines and makes the digital signals which is converted stored into the DRAM. After the D/A conversion reverted, the leaving word can be reproduced.

Description

Telephone automatic answer-back unit without magnetic tape

The utility model relates to a kind of phone automatic answering device, is applicable in the various telephone communication systems.

Phone automatic answering device of the prior art mainly is made of magnetic instrumentation tape, ring detection and control circuit.Be characterized in all must finishing the storage of speech signal by return to zero.

No. 90204517.2 patent that Patent Office of the People's Republic of China (PRC) has been authorized, i.e. " phone is recorded automatically, message leaving device ", its basic principle is with the phone interface arrangement of recording automatically, leave a message, and plain old telephone and recorder in the grafting are finished the function of telegraphone.Because of magnetic recording method need just exist the wearing and tearing of magnetic head, tape by the precision optical machinery device, mechanical aging, motor life is than problems such as the phone life-span itself are short, and needs frequent rewinding, troublesome poeration during repeat playing.

The purpose of this utility model is to provide a kind of phone automatic answering device that can overcome above-mentioned shortcoming, and it need just can not finish automatic answer function by magnetic instrumentation tape.

The utility model is achieved in that with the tape deck of sound-compound-circuit as speech signal in the message.Before the automatic-answering back device, utilize microphone will receive words side's message and send into speech processor, realize the sampling of voice signal, and the digital signal that converts to is deposited among the DRAM.When bell flowing detecting circuit judges that nobody answers the call, upwards the predicate audio processor sends the playback signal, then speech processor carries out the D/A conversion to the information among the DRAM of being stored in, and sequence circuit control switch circuit is connected switch simultaneously, and in advance message is sent on the external call line.After receipts words side message had sent, sequential control circuit triggers awarded words side's sound-compound-circuit, the work fixed length time, and utilize binary counter to encode, the other side is left a message fragmented storage in DRAM.Playback time carries out the digital signal of fragmented storage in DRAM the D/A conversion, equally through amplifying circuit, loudspeaker reproduction.

Owing to adopt the digital speech synthetic technology in the above-mentioned solution, finish the processing and the storage of voice, so compared following advantage: 1) adopt all electronic circuit with other telegraphone, need not be by the mechanical recording part, the functional reliability height, simple to operate, volume is little.2) because of its volume is little, in light weight, thus telegraphone become in the phone of easily packing into, and do not have electronic section mutually the pin down problem longer than the mechanical part life-span; Also can be used as the functional unit of phone, the change plain old telephone is telegraphone.3) receive words side's message content because of using DRAM as memory element, can upgrading at any time, in time inform and receive words people's whereabouts and next air time,, reduce unnecessary searching and holding time so that in time get in touch.4) playback time, message once arbitrarily in the middle of need not rewinding can listening to repeatedly.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 is an electrical principle block diagram of the present utility model.

Fig. 2 is the external structure of the utility model first embodiment.

Fig. 3 is the circuit theory schematic diagram of Fig. 2 embodiment.

Fig. 4 is the external structure of another embodiment of the utility model.

Fig. 1 illustrates electrical principle block diagram of the present utility model.Import as telephone ring signal, bell flowing detecting circuit is judged when nobody answers the call, trigger and receive words side's message sound-compound-circuit, the receipts words people message that VODER will be stored among the DRAM in advance carries out the D/A conversion, give sequential control circuit one signal simultaneously, through the sequential time-delay, connect switching circuit, the realization automatic off-hook also will be received words people message and deliver to outside line by A, B line.The triggering and the operating time of words side's message sound-compound-circuit awarded in sequence circuit control, awarding words people sound enters in the VODER through A, B line and switching circuit, time is realized automatic hand-up to back sequence circuit stopcock, awards words side's message VODER and enters tone playing state.In addition, sequence circuit also gives counting circuit with count pulse, and its binary system output realizes segment encoding to VODER.

In the outside connection layout of first embodiment shown in Figure 2, the input of the signal of phone automatic answering device 2 A, B terminate at the wiring of telephone set 1 and close.2 as 1 functional part, and outside 220V AC power is introduced by C.When receipts words people leaves a message, can be by record button D, this moment, relay indicating light I was bright, after having recorded, made this device enter the automatic-answering back device wait state with reset key E, digital demonstration H demonstration " 0 ".The H counting shows " 1 " after the automatic-answering back device, after repeatedly replying, receives words and can reproduce any words side's message of once awarding by options button F and playback button G.

Fig. 3 is the circuit theory schematic diagram of Fig. 2 embodiment.Wherein C1, D1-D4, R1, C2, IC1, R2, C3, C4, IC2 form ring detecting circuit, bell signal is added to photoelectric coupling circuit IC1 through rectification, the filtering of C1, D1-D4, R1, C2, the output of IC1 triggers IC2, the monostable circuit that IC2 is made up of the NE555 time-base circuit, its time-delay output enters the trigger end 3 of IC3, and IC3 is as the speech processor of receiving words side's message.This moment IC3 operating state display end 4, give sequential control circuit one triggering signal of forming by IC4 and inverter, NAND gate.The delay circuit that IC4 is made up of time-base circuit NE555, its delay time can be by regulating R3 control, the output of delay circuit is entered the input 6 of switching circuit by 5 ends of IC4, R4, R5, T1 amplifies the rear drive relay J with this signal, then the normally opened contact J1 of J connects, receive of the amplification of words people message through amplifier IC5 and triode T2, enter A, the B line, sequential control circuit is given and is awarded words side message VODER IC6 a series of control signals simultaneously, the recording playback state of IC6 is provided with and holds 8 to be the recording wait state at this moment, starting input 7 is received the work commencing signal, awards words people message through R6, R7, C5 enters the voice signal input 10 of IC6, carries out digital recording.After timing arrived, sequential control circuit was to stopping to hold 9 to send stop pulse, and the J in the switching circuit discharges simultaneously, and J1 disconnects, and 8 ends recover the playback wait state.IC7 is a tetrad counter, behind the recording end-of-job, sequence circuit is given count pulse of 11 ends of IC7, then the output of IC7 driving decoder H shows as the calling number of times, the output of IC7 is simultaneously selected coding control 11-14 end as the section of IC6, switch D, E, F, G be connected on respectively recording control end 15, the IC6 of IC3 reset terminal 16, IC7 11, IC6 7.IC8, IC9 are respectively IC3, IC6 corresponding D RAM.Microphone enters the phonetic entry end 17 of IC3 by the amplification of amplifier IC10, the voice output of IC8 through power discharging IC 11(here usefulness be LM386) drive loud speaker.

According to above-mentioned principle, external structure of the present utility model also can be by shown in Figure 4, and it is integrated to be about to ringing circuit, speaking circuit and automatic recording circuit.A, the B line of answering the call among Fig. 4, the external 220V AC power of C, D, E, F, G, H, I are respectively and receive that words people record button, reset key, options button, playback button, talk times show, the operating state indication, and K is the plain old telephone button.

Certainly, external structure of the present utility model is not limited to above two kinds of forms, can also be other similar type.

Claims (4)

1, a kind of phone automatic answering device, it comprises: casing, ring detecting circuit, sequential control circuit, switching circuit, it is characterized in that: it also comprises receives words side and awards words side's message sound-compound-circuit, its circuit constitutes: the holding wire A on the phone, the B line is connected to ring detecting circuit, the output of this circuit links to each other with receipts words side message sound-compound-circuit, this sound-compound-circuit connects with switching circuit and sequential control circuit respectively again, the former and A, the B line links to each other, the latter and switching circuit and award words side message sound-compound-circuit and connect are respectively awarded the words side sound-compound-circuit of leaving a message and are linked to each other with switching circuit again.

2, phone automatic answering device according to claim 1 is characterized in that: receiving the words side sound-compound-circuit of leaving a message is to be made of the chipspeech with ring triggering function and corresponding DRAM thereof and peripheral circuit.

3, phone automatic answering device according to claim 1 is characterized in that: award words side message sound-compound-circuit and be by having segmentation or suspending the chipspeech of recording and reproducing function and corresponding DRAM and peripheral circuit constitute.

4, phone automatic answering device according to claim 1 is characterized in that: be provided with the 220V AC Power supply socket on its casing and telephone signal line A, B introduce socket.

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