CN2183059Y - Arrangement for recording message forabsent telephone subscriber - Google Patents

Arrangement for recording message forabsent telephone subscriber Download PDF

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CN2183059Y
CN2183059Y CN 93202362 CN93202362U CN2183059Y CN 2183059 Y CN2183059 Y CN 2183059Y CN 93202362 CN93202362 CN 93202362 CN 93202362 U CN93202362 U CN 93202362U CN 2183059 Y CN2183059 Y CN 2183059Y
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曾广兴
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Abstract

The utility model relates to a solid state voice recording and playing and message leaving device for a telephone set, which is composed of a solid state voice recording and playing integrated circuit, a random access memory, an impulse or double audio frequency demodulator, a voice recording and playing control circuit, a ringing detection circuit, an electronic switch and a voice power amplification circuit. After connected with the existing general telephone set, the utility model can realize all the functions of recording voice and inquiring by hands of the existing voice recording telephone set, a host can immediately change the massage left by the host through the telephone at a different place and a guest can also automatically inquire the message left by the host through a telephone. Thus, the utility model provides great convenience for the guest to know the information of the host of the telephone in time and the host of the telephone to know the information of the guest who calls the host in time.

Description

Arrangement for recording message forabsent telephone subscriber
The utility model relates to the solid-state message just recorded device of a kind of novel telephone set without audio tape, it can allow the guest inquire about leave a message back message of owner automatically with phone, can allow owner inquire guest message with phone again in the strange land, or in the strange land with the message of phone change oneself.
Ordinary telephone set has four kinds of dialing disc type telephone set, push-button telephone, common dtelegraphone and multi-functional dtelegraphones, and the first two plants telephone set can only carry out general conversation; The third dtelegraphone (as the domestic product of seeing on the market) has the employing audio tape, also have and adopt solid-state recording playback sound integrated circuit, though can record and inquire about, but must when going home, owner just can inquire the content of message just recorded with manual operation, perhaps the phone owner has been away from home and has wanted to change the message of being in before going out, and is then powerless at all; And the 4th kind of multi-functional dtelegraphone (as the product of Japan of seeing on the market) is though available phone inquiry and change message, but use audio tape, must carry out rewinding or forward (FWD) to tape, wait for that the regular hour just can finish the work of inquiry and change message, and there is mechanical wear, influences the life-span of telephone set.
The purpose of this utility model is that a kind of solid-state recording playback sound of the telephone set message leaving device that can inquire about automatically immediately and leave a message without audio tape will be provided, its the existing traditional recording and all functions of manual queries, (strange land is meant can't be with the place of this telephone set of manual operation in the strange land can to allow the owner of this telephone set again, automatically inquire guest's message immediately with phone down together), or change oneself message immediately with phone, also can allow the guest inquire about owner message automatically, and not have mechanical wear and popularize easily with phone.
The utility model as shown in Figure 2, detect phone (U1) by ring, solid-state recording playback sound integrated circuit (U3), electronic switch (U2), pulse or double-tone be demodulator (U6) frequently, automatically record playback control circuit (U7), random access memory (RAM) (U4, U5), manually record playback control circuit (U8), speech iput circuit (U10) and voice power amplifier (U9) are formed, wherein ring detecting circuit (U1) is connected with the playback pin of solid-state recording playback sound integrated circuit (U3), electronic switch (U2) control end is connected with the control pin (CTL) of solid-state recording playback sound integrated circuit (U3), the output pin (FILO) of solid-state recording playback sound integrated circuit (U3) and microphone pin are connected with the output pin of electronic switch (U2), electronic switch (U2), pulse or double-tone be demodulator (U6) frequently, automatically after record playback control circuit (U7) connects successively, press certain way and random access memory (RAM) (U4, U5) control line connects, random access memory (RAM) (U4, U5) address wire, control line, the address wire of data wire difference correspondence and solid-state recording playback sound integrated circuit (U3), control line is connected with data wire, manually recording playback sound integrated circuit (U8) is by playback button, record button, stop key is formed, each key respectively with the playback pin of solid-state recording playback sound integrated phone (U3), the recording pin, stopping pin connecting, speech iput circuit (U10) is connected with the microphone pin of solid-state recording playback sound integrated circuit (U3), and voice power amplifier (U9) is connected with the output pin (FILO) of solid-state recording playback sound integrated circuit (U3).Telephone wire L1, L2 with telephone set during use are connected with this device, but then form the leave word call machine, this telephone set can be at local (propping up the place of this telephone set of operation but this locality is meant hand, down together) and this telephone set of strange land difference control operation, and its principle division is as follows; 1, the local manual operation of telephone set owner: if press " recording " key in the manual record playback control circuit (U8), then trigger solid-state recording playback sound IC, record, owner's message is existed among owner's section of message RAM; " owner leave a message inquiry " key is then chosen owner's section of message and is triggered solid-state recording playback sound IC if press, and makes it to be tone playing state, and output signal can be heard the message sound of oneself after amplification; " guest leave a message inquiry " key if press, then (setting guest's section of message during design is 1~16 section by the corresponding guest of the manual record playback control circuit gating section of message, every section 8~64 seconds), and trigger solid-state recording playback sound IC, make it to be tone playing state, then guest's message sound of this section output immediately after amplifying.So just, telephone set owner local operation message, the function of manually inquiring about guest's message immediately and inquiring about self message have immediately been realized.2, strange land phone operation; (1) owner strange land phone operation; After putting through this dtelegraphone number, if wait for above 12 seconds.Then solid-state recording playback sound IC will be triggered automatically, output strobe, connect speech channel, at this moment owner is by a certain key of telephone set (being made as the # key), then the pulse of this key or dtmf signal are in speech channel is sent to this dtelegraphone, decoded output one control signal makes solid-state recording playback sound IC be in wait state.If owner wants to leave a message again by phone, then can be by another key of telephone set (being made as the * key), the pulse of this key or dtmf signal make solid-state recording playback sound IC recording state as the recording control signal after deciphering, and the RAM of the gating owner section of message, at this moment can leave a message again immediately facing to the phone speech.If owner wants to inquire the message of having recorded the guest on this dtelegraphone at home immediately automatically by phone, then can after connecting speech channel, press the # key, make solid-state recording playback sound IC be in wait state, (establish by a numerical key again by n, then can inquire about n section guest message), making solid-state recording playback sound IC after decoding is tone playing state, and the gating n section guest section of message RAM, at this moment the guest of n section message will be reset out immediately, and be sent on the phone ear tube that is just using in the owner location by putting the road.Realized so just leaving a message immediately with phone in the owner strange land and inquired about guest's two functions of leaving a message immediately automatically with phone.(2) guest strange land phone operation; Put through this dtelegraphone number of owner, if owner stays out, solid-state recording playback sound IC is automatically by the conversation road after 12 seconds, making solid-state recording playback sound IC by automatic record playback control circuit is tone playing state, and the gating owner section of message, then will be reset immediately with the message of phone operation in the owner message or the strange land of leaving, and deliver in guest's phone ear tube.If the guest thinks message, then after hearing out owner's message, because solid-state recording playback sound IC sends one " toot " sound, making solid-state recording playback sound IC by automatic recording playback sound control system phone is recording state, and the 1st section guest's section of message RAM of gating when the gating guest section of message RAM(leaves a message as the 1st guest in order, the 2nd section guest's section of message RAM of gating when then the 2nd guest leaves a message), at this moment the guest can be with the record of message sound in guest's section of message RAM of correspondent section facing to the microphone speech.So just, finished the guest and inquired about two functions in addition that owner leaves a message, the guest uses telephone message automatically with phone.
The utility model not only has the traditional dtelegraphone recording and all functions of manual queries, can allow the telephone set owner inquire guest's message immediately automatically with phone again in the strange land, or change oneself message immediately with phone, also can allow simultaneously the guest pass through phone and inquire about owner's message automatically, information and the timely information of understanding the guest that calls of telephone set owner of in time understanding the telephone set owner for the guest provide great convenience.In addition, this message just recorded device is without audio tape, thereby do not have mechanical wear, and adopts universal elements, and cost is lower, is beneficial to popularize.
Fig. 1 is the structured flowchart that the utility model is connected with telephone set, and A1 is the telephone set of no announcement record function, and A2 is solid-state recording playback sound message leaving device, and L1, L2 are telephone wire; Fig. 2 is the block diagram of solid-state recording playback sound message leaving device; Fig. 3 is solid-state recording playback sound message leaving device circuit structure diagram.
Describe details and working condition in detail below in conjunction with Fig. 1, Fig. 2 and Fig. 3 according to the concrete device that the utility model proposes.
Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof, and this example is demodulated into example frequently with 3 sections messages and inquiry and double-tone, and wherein 1 section is owner's section of message, and 2 sections are guest's section of message.
A1 among Fig. 1 is corresponding to the block diagram A1 among Fig. 3.Among Fig. 2, U1 is a ring detecting circuit, U2 is an electronic switch, and U3 is a solid-state recording playback sound integrated circuit (IC), and U4 is owner's section of message random access memory (RAM) (RAM), U5 is guest's section of message random access memory (RAM) (RAM), U6 is pulse or double-tone frequency (DTMF) demodulator, and U7 records playback control circuit automatically, and U8 manually records playback control circuit, U9 is the voice power amplifier, and U10 is a voice signal input phone.
Among Fig. 3, the rectification circuit that C1, R1, D1~D4 form, C2, D5, R2, T1 form ring detecting circuit (corresponding to the U1 among Fig. 2) and wherein are connected with the T1 control end after C1, R1, rectification circuit, the R2 serial connection; The rectification circuit that D6~D9 forms, T2, R8, R9, monostable whole IC circuit 10-1 form electronic switch (corresponding to the U2 among Fig. 2), wherein the output of monostable circuit IC10-1 is connected with triode T2 control end, the clock end of monostable circuit is connected with the control end (CTL) of solid-state recording playback sound integrated circuit (U3), the T2 input is connected with rectification circuit, and output is connected with the output pin (FIL0) of solid-state recording playback sound integrated circuit (U3). IC1 is a solid-state recording playback sound integrated circuit (corresponding to the U3 among Fig. 2), and it can select the integrated circuit of models such as UM5100, UM5101, UM93510A/B, SR460, YYH402, YYH16, YYH40 for use, and this example is to adopt YYH402; IC6, IC7(62256) for leaving a message, owner uses random access memory (RAM) (corresponding to the U4 among Fig. 2); IC2~IC5(62256) leave a message with random access memory (RAM) (corresponding to the U5 among Fig. 2) for the guest; IC12(MT8870) being DTMF demodulation IC, IC13(CD4515) is 4~16 line decoders, and IC12, IC13 and peripheral cell thereof are formed DTMF demodulator (corresponding to the U6 among Fig. 2); With door, not gate and OR circuit G1~G9, monostable circuit IC8-1(2) (CD4013), IC9-1(2) (CD4013), IC11(CD4017), IC14-1(2) (CD4066), IC15-1(CD4066) etc. then form record playback control circuit (corresponding to the U7 among Fig. 2) automatically; Button PLAY, REC, STOP, SELECT1, SELECT2 etc. form manually record playback control circuit (corresponding to the U8 among Fig. 2), microphone MIC, R4, C3, R5 form speech iput circuit (U10 in the corresponding diagram 2), and IC16, C6, loud speaker SP compose in series voice power amplifier (corresponding to the U9 among Fig. 2).During use, the telephone wire L1 of telephone set is connected with the input of the rectification circuit of the rectification circuit of ring detecting circuit (U1) and electronic switch (U2) respectively, L2 is connected with the output of last two rectification circuits, then can realize and being connected of telephone set.
This leave word call machine can be recorded altogether--put 3 sections voice signals (being numbered 0,1,2), wherein the 0th section internal memory provided by IC6, IC7, leave the telephone set owner use of leaving a message for, and the 1st section internal memory provided by IC4, IC5, the 2nd section internal memory provided by IC2, IC3, and these 2 sections internal memories are left guest's use of leaving a message for.This telephone set also has 6 kinds of functions except can conversing normally, convenient for introducing principle, it is as follows at first to introduce these 6 kinds of function operations rules:
(1) the local manually message of telephone set owner: by the button REC(Fig. 3 on this device), can record down this telephone set owner's message.
(2) the telephone set owner leaves a message immediately with phone in the strange land: owner puts through this dtelegraphone number in the strange land with phone, wait for about 12 seconds, then this dtelegraphone is connected automatically, at this moment by " # " key, again by " * " key, owner can realize that facing to the microphone speech owner strange land leaves a message immediately with phone.
(3) guest inquires about owner's message automatically with phone: the guest puts through this dtelegraphone number with phone, after if owner stays out and then waits for 12 seconds, automatically connect speech channel, and send owner's message of the 0th section to guest, the 0th section will be sent one " toot " after having put.
(4) guest uses telephone message: the guest puts through this dtelegraphone number with phone, if owner stays out, automatically connect speech channel after then waiting for 12 seconds, began to leave a message about 16 seconds after hearing out owner's section of message (the 0th section) and hearing one " toot " sound, at this moment guest's message will be by record in the RAM of the 1st section or the 2nd section.
(5) owner this locality is manually inquired about guest's message immediately: by the button SELECT1(Fig. 3 on this dtelegraphone), then can inquire about the message that the guest is stored in the 1st section, press SELECT2(Fig. 3) key, then can inquire about the message that the guest is stored in the 2nd section.
(6) guest's message is inquired about immediately automatically with phone in the owner strange land: this telephone set owner puts through this dtelegraphone number in the strange land with phone, speech channel is connected automatically after waiting for about 12 seconds, at this moment by " # ", again by " 1 " key, then the 1st section guest message sends owner to immediately by speech channel; If again by " 2 " key, then the 2nd section guest message sends owner to immediately by speech channel.
Describe the circuit working principle in detail according to the aforesaid operations rules below:
IC8-1, IC8-2, IC9-1, IC9-2, IC10-1, IC10-2 all form monostable circuit among Fig. 3, and the pulse duration of its output Q1, Q2, Q3, Q4, Q5, Q6 is by the numerical value decision of external resistance capacitance.The effect of diode D11, D12, D13 and capacitor C 23, C24 is manually to control button and automatic control circuit is kept apart, and does not disturb mutually.Through and door G1, G9, not gate G2, G3 and or the logic control circuit of door G4, G5, G6, G7, G8 can to get the logical expression of the recording playback sound control system signal PLAY of gating signal K0, K1, K2 and the IC1 of analog switch IC14-1, IC14-2, IC15-1, REC, STOP as follows:
K0=
Figure 932023622_IMG2
Figure 932023622_IMG3
---K0 is the 0th a section gating signal,
High level is effective.
K1=Q1+Q3---K1 is the 1st a section gating signal,
High level is effective.
K2=Q2+Q4---K2 is the 2nd a section gating signal,
High level has friendship.
PLAY=Q1+Q2---PLAY is an IC1 playback triggering signal, and high level is effective.
REC=S ' 11+Q3+Q4---REC is an IC1 recording triggering signal, and high level is effective.
STOP=S ' 12---and STOP is the IC1 stop signal, and low level is effective.
S ' 11 is the signal of output S11 behind C22, R22 of IC13 in the formula, and S ' 12 is the signal of output S12 behind C21, R21 of IC13.
The detailed operation principle divides two kinds of situations to describe:
One, normal talking situation
Ring if owner is in, and hung in 12 seconds, then connect speech channel, telephone set (the block diagram A1 among Fig. 3 or Fig. 1) with no announcement record function carries out normal talking, and message leaving device (the block diagram A2 among Fig. 1) can not be triggered, and is in wait state.
Two, the situation of inquiring about immediately and leaving a message
1, the local manually message of telephone set owner
Owner presses the REC button among Fig. 3, REC=1 then, in addition since this moment IC8-1(2), IC9-1(2) each output signal Q1, Q2, Q3, Q4 be 0, so K0=1, K1=0, K2=0, PLAY=0, thereby the 0th section of gating only, IC1 is triggered and is set at recording state, and at this moment owner is facing to microphone MIC speech, sound is delivered to IC1 through the C3 coupling and through R5, handle and output by IC1, sound is promptly existed among the RAM of IC6, IC7, about 16 seconds of message time.
2, the telephone set owner leaves a message immediately with phone in the strange land
If owner has been away from home and has wanted to change the message of having recorded before it is gone out at the 0th section, then can put through the telephone number of family in the strange land with phone, send bell signal by telephone wire, this signal is exported a negative pulse at the collector electrode of T1 behind ring detecting circuit, the PLAY1 end of IC1 is delivered in this pulse.Because the characteristic of IC1 is: if the PLAY1 end connected the low level time above 12 seconds, then will trigger the IC1 playback automatically, and the CTL of IC1 end output high level, so nobody answers the call if wait surpasses 12 seconds, then will trigger IC1 automatically, at this moment CTL holds the high level of sending to export an about negative pulse of 60 seconds (reason that is designed to 60 seconds is to carry out Help by Phone or message in order there to be time enough to connect speech channel) through the monostable circuit of IC10-1 at the Q5 end, at this moment T2 conducting, speech channel is connected, owner is by " # " key, then the dtmf signal of " # " key is through speech channel L1, L2, D6~D9, T2, R11 delivers to IC12, in the DTMF demodulator circuit that IC13 forms, at the S12 of IC13 end output high level, through C21, R21, produce a transient state negative pulse behind the G3 and deliver to the STOP end of IC1, make IC1 be in wait state.Owner is again by " * " key, the S11=1 of IC13 then, and making the REC transient state behind C22 is 1, trigger IC1 and begin recording, and output Q1, Q2, Q3, the Q4 of each monostable trigger-action circuit are 0, thus K0=1, K1=0, K2=0, the 0th section RAM gating, owner is facing to the phone speech, and sound is input among the IC1 through speech channel L1, L2, D6~D9, T2, C4, R5, the signal of will leaving a message after IC1 handles is stored in the 0th section RAM(IC6, IC7 again) in, about 16 seconds of message time.To make T2 end automatic hand-up behind 60 seconds monostable end-of-pulsings of IC10-1 output.The automatic hand-up process of following function herewith will repeat no more.
3, the guest inquires about owner's message automatically with phone
The guest puts through owner's telephone number, if owner stays out, wait for that then surpassing 12 seconds will trigger IC1 automatically, making IC1 is tone playing state, since K0=1, K1=0, K2=0, so at this moment the owner's message with the 0th section RAM sends the guest to from the FLIO end output of IC1 and through R7, C5, C19, T2, D6~D9, speech channel L1, L2, put the back in the KTO of IC1 end output one " toot " acoustical signal, send the guest to through C20, T2, D6~D9 and L1, L2.
4, the guest uses telephone message
The guest puts through owner's telephone number, repeat above-mentioned process at the 3rd, when the guest hears out owner message and hears that one " toots " acoustical signal will export the positive pulse of about 0.7 second pulsewidth and deliver to IC11(CD4017 after the shaping of IC10-2 monostable trigger-action circuit) the clock end CP of decade counter, and IC11 has passed through C13 when starting shooting, R19 automatically resets, and makes X0=1, X1=0, X2=0 will be so after receiving this pulse, will count once, become X0=0, X1=1, X2=0, the positive transition of X1 will trigger the monostable trigger-action circuit of IC9-1, in gating positive pulse of about 16 seconds of its output Q3 output, at this moment Q3=1, thereby K0=0, K1=1, K2=0, PLAY=0, REC=1, the 1st section RAM of gating, be recording state, at this moment will there be the 1st section RAM(IC4 in guest's message, IC5) in.When second guest telephoned in, the process that triggers IC1 was the same, when sending " toot " sound, trigger IC11, make X0=0, X1=0, X2=1, and X2 meets reset terminal R through D10, so IC11 is reset immediately, makes X0=1, X1=0, X2=0, the positive transition of X0 makes the output Q4 of the monostable trigger-action circuit of IC9-2 export about 16 seconds gating positive pulse, at this moment a Q4=1, thereby K0=0, K1=0, K2=1, PLAY=0, REC=1, the 2nd section RAM of gating is recording state, and second guest's message will exist the 2nd section RAM(IC2, IC3) in.Repeat said process when also having the guest to call, old message is replaced by newer message.
5, owner this locality is manually inquired about guest's message immediately
When owner presses manual queries button SELECT1, trigger IC8-1, in monostable pulse of about 16 seconds of Q1 output, at this moment Q1=1, so K0=0, K1=1, K2=0, PLAY=1, REC=0, the 1st section RAM of gating is tone playing state, the 1st section message will be reset, and output signal is sounded by loud speaker SP after IC16 amplifies.When owner presses manual queries button SELECT2, trigger IC8-2 in monostable pulse of about 16 seconds of Q2 output, so Q2=1 at this moment is K0=0, K1=0, K2=1, PLAY=1, REC=0, the 2nd section RAM of gating is tone playing state, and at this moment the 2nd section message is released by SP.
6, guest's message is inquired about immediately automatically with phone in the owner strange land
Owner puts through the telephone number of family with phone in the strange land, wait for surpassing and to trigger IC1 automatically after 12 seconds, automatically connect speech channel, at this moment owner is by " # " key, then the dtmf signal of " # " key through speech channel and D6~D9, T2, R11, be added in the demodulator circuit of IC12, IC13, make the output S12=1 of IC13, the STOP of IC1 is triggered, get back to wait state by C21, R21, G3.Owner then by " 1 " key, then makes the S1=1 of IC13 if want to inquire about guest's message of the 1st section after demodulation, trigger IC8-1 through C24, R24 and make its Q1 export about 16 a seconds monostable pulse, i.e. so Q1=1 is K0=0, K1=1, K2=0, PLAY=1, REC=0, the 1st section of gating, be tone playing state, IC1 exports leave a message signal and deliver on speech channel L1, the L2 through R7, C5, C19, T2, D6~D9 of the 1st section guest immediately, makes owner can hear guest's the 1st section message immediately.If owner thinks to inquire about guest's message of the 2nd section immediately,, make the S2=1 of IC13 then by " 2 " key, trigger IC8-2 through C23, R23, make Q2 export about 16 seconds monostable pulse, i.e. a Q2=1, so K0=0, K1=0, K2=1, PLAY=1, REC=0, the 2nd section of gating is tone playing state, remaining process is the same, and at this moment owner can hear guest's the 2nd section message immediately.

Claims (9)

1, the solid-state recording playback sound of a kind of telephone set stays mixer, it is characterized in that detecting phone (U1) by ring, solid-state recording playback sound integrated circuit (U3), electronic switch (U2), pulse or double-tone be demodulator (U6) frequently, automatically record playback control circuit (U7), random access memory (RAM) (U4, U5), manually record playback control circuit (U8), speech iput circuit (U10) and voice power amplifier (U9) are formed, wherein ring detecting circuit (U1) is connected with the playback pin of solid-state recording playback sound integrated circuit (U3), electronic switch (U2) control end is connected with the control pin (CTL) of solid-state recording playback sound integrated circuit (U3), the output pin (FILO) of solid-state recording playback sound integrated circuit (U3) and microphone pin are connected with the output pin of electronic switch (U2), electronic switch (U2), pulse or double-tone be demodulator (U6) frequently, automatically after record playback control circuit (U7) connects successively, press certain way and random access memory (RAM) (U4, U5) control line connects, random access memory (RAM) (U4, U5) address wire, control line, the address wire of data wire difference correspondence and solid-state recording playback sound integrated circuit (U3), control line is connected with data wire, manually record playback control circuit (U8) is by playback button, record button, stop key is formed, each key respectively with the playback pin of solid-state recording playback sound integrated phone (U3), the recording pin, stopping pin connecting, speech iput circuit (U10) is connected with the microphone pin of solid-state recording playback sound integrated circuit (U3), and language power amplifier (U9) is connected with the output pin (FILO) of solid-state recording playback sound integrated circuit (U3).
2, the mixer that stays according to claim 1 is characterized in that above-mentioned solid-state recording playback sound integrated circuit (U3) can select the integrated circuit of UM5100, UM5101, UM93510A/B, SR460, YYH402, YYH16, YYH40, T6668, LH-250, TC8830F model for use.
3, the mixer that stays according to claim 1, it is characterized in that above-mentioned random access memory (RAM) comprises owner's section of message memory (U4) and guest's section of message memory (U5), wherein owner's section of message memory (U4) is 1~4 section, guest's section of message memory (U5) is 1~16 section, and every recording playback period is 8~64 seconds.
4, the mixer that stays according to claim 1, it is characterized in that rectification circuit, C2, D5, R2, main pole pipe T1 that above-mentioned ring detecting circuit (U1) is made up of C1, R1, D1~D4 form, wherein C1, R1, rectification circuit, R2 serial connection back are connected with the T1 control end.
5, message leaving device according to claim 1, it is characterized in that rectification circuit, triode T2, monostable circuit IC10-1 that above-mentioned electronic switch (U2) is made up of D6~D9 form, wherein the output of monostable circuit IC10-1 is connected with the T2 control end, its clock end is connected with the control pin (CTL) of solid-state recording playback sound integrated circuit (U3), the T2 input is connected with rectification circuit, and output is connected with the output pin (FIL0) of solid-state recording playback sound integrated circuit (U3).Be connected with pulse or double-tone frequency demodulator (U6) input pin simultaneously.
6, the mixer that stays according to claim 1 is characterized in that above-mentioned double-tone frequency demodulator (U6) is composed in series by demodulator IC12 and decoder IC13.
7, the mixer that stays according to claim 1 is characterized in that above-mentioned automatic record playback control circuit (U7) comprises logic control circuit and several analog switches of being made up of several and door, not gate and OR circuit and several monostable circuits.
8, the mixer that stays according to claim 1 is characterized in that above-mentioned speech iput circuit (U10), is made up of microphone MIC, R4, C3, R5, wherein MIC, C3, R5 serial connection.
9, message leaving device according to claim 1 is characterized in that above-mentioned voice power amplifier (U9) is formed by power amplification circuit IC16, C6, loud speaker SP serial connection.
CN 93202362 1993-02-01 1993-02-01 Arrangement for recording message forabsent telephone subscriber Expired - Fee Related CN2183059Y (en)

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CN 93202362 CN2183059Y (en) 1993-02-01 1993-02-01 Arrangement for recording message forabsent telephone subscriber

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Application Number Priority Date Filing Date Title
CN 93202362 CN2183059Y (en) 1993-02-01 1993-02-01 Arrangement for recording message forabsent telephone subscriber

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CN2183059Y true CN2183059Y (en) 1994-11-16

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