CN2205984Y - Language studying function extender for magnetic tape reproducer - Google Patents

Abstract

The utility model relates to a language studying function extender for a magnetic tape player, which uses a logic control circuit to simultaneously control a solid language recording-playing circuit and the circumscribed power switch circuit of the magnetic tape player. Therefore, the solid language recording-playing circuit realizes the automatic recording and playing. Simultaneously, a signal selective circuit controls the solid language recording-playing circuit to select to record magnetic tape playing information or microphone pick-up information. The utility model has the advantages of simple structure, reliable performance and varied functions and is suitable to be matched with various magnetic tape players. The language studying function extender for the magnetic tape extender is a good auxiliary tool for improving the language learning efficiency.

Description

Language studying function extender for magnetic tape reproducer

The utility model relates to a kind of multifunctional language learning servicing unit, and refering in particular to is a kind of magnetic tape sound reproducer function of language learning extender.

At present, great majority are big, middle school student are the raising foreign language listening and speaking ability, generally all learn foreign languages by magnetic tape sound reproducer, but because due to the magnetic tape sound reproducer structure, generally do not possess with reading and contrast sound-recording function, therefore, it only can improve user's hearing, and troublesome poeration in using, the user more and more feels its inconvenience in actual use.

The purpose of this utility model is to overcome the deficiency of prior art and provides a kind of simple in structure, and dependable performance is easy to operate, possesses repetition simultaneously, with the magnetic tape sound reproducer function of language learning extender of reading, record, relatively wait multiple function outward.

The utility model is to adopt following proposal to realize, control solid language playback circuitry and external magnetic tape sound reproducer power switch circuit simultaneously by logic system control circuit, make solid language playback circuitry realize record, playback automatically, simultaneously, select to record tape playback information or microphone pickup information by signal selecting circuit control solid language playback circuitry, with the realization repetition that the utility model was possessed, with reading comparing function.

Specific embodiments of the present utility model describes in detail below in conjunction with accompanying drawing:

Accompanying drawing 1 is the utility model electricity functional-block diagram;

Accompanying drawing 2,3 is the utility model electrical schematic diagram;

See accompanying drawing 1,2,3, the utility model is by logic control circuit 1, solid audio record circuit 2, and magnetic tape sound reproducer power switch circuit 3, Information Selection circuit 4, microphone amplifying circuit 5, filter amplification circuit 6 is formed.The output of described logic control circuit 1 connects solid language playback circuitry 2 respectively, magnetic tape sound reproducer power switch 3, the input of signal selecting circuit 4, the output one tunnel of signal selecting circuit 4 connects solid language playback circuitry 2, and another road connects filter amplification circuit 6, and the output of solid audio record circuit 2 connects the input end of filter amplification circuit 6, the output of microphone amplifying circuit 5 connects the input of signal selecting circuit 4, and logic control circuit 1 is by switch P 1-P4, trigger Q1-Q4, and resistance R 15-R18 forms, solid language playback circuitry 2 is by ic chip 1, IC2, resistance R 1, R2, capacitor C 1-C4, C10, C11, diode D1, D2 forms, tape player-recorder power switch circuit 3 is by resistance R 14, triode T1, and magnetic tape sound reproducer power interface J2 forms, signal selecting circuit 4 is made up of electronic switch K1-K3, microphone amplifying circuit 5 is by microphone MIC, resistance R 12, R13, capacitor C 13-C15, operational amplifier A X forms, and filter amplification circuit 6 is by operational amplifier A 1-A3, resistance R 3-R11, capacitor C 5-C9, C12, potentiometer W, ic chip 3, IC4, switch S 1, loudspeaker SP, magnetic tape sound reproducer earphone interface J1 forms.

In the utility model, the model of ic chip 1 is LH--250, and the model of IC2 is DRAM41256, and the model of IC3 is 7805, and the model of IC4 is LM386.

Principle of work of the present utility model and using method are sketched in following:

1, repeat: press switch P 4, trigger Q4 puts 1, and all the other triggers are all put O.R/W is that high level makes ic chip 1 be in the playback attitude, and the content of giving in the first typing ic chip 2 is sent into amplifier A1 by 26 pin and 29 pin of ic chip 1 after D/A changes, and promotes the loudspeaker sounding through A2 by LM386.This moment electronic switch K1, K2 all turn-offs, extraneous signal does not enter A2, A3.The PC end is controlled triode T1 shutoff for low level, makes outside cassette player outage and stops sound reproduction.

2, tape playback: trigger P1, Q1 puts 1, and all the other triggers are then put O.K1 and PC end is high level, makes electronic switch K1 and triode T1 conducting respectively, makes outside cassette player begin playback (the PLAY key gave earlier and pressing this moment), and earphone outputs to J1 and sends into A2 and A3 after by K1.The A2 output signal promotes the loudspeaker sounding by ic chip 4; This moment, R/W was a low level, and ic chip 1 is in the endless track sound recording state, and the A3 output signal enters ic chip 1 and records.Therefore the time, Q2 puts O turn-offs K2, guarantees to have only tape signal to enter, afterwards if press repeat key, on the tape of then resetting by this key content of 16 seconds before.

3, with reading, recording outward: trigger P2 and make Q2 put 1, all the other put O.R/W is that low level makes ic chip 1 be in the endless track sound recording state, and Q2 is that high level is connected K2, and microphone signal is sent into A2 and A3.But because K3 connects noise elimination end 14 pin of W1 and ic chip 1, loudspeaker noise elimination, signal are only sent into ic chip 1 recording.Here it is outer recording function, if after the tape playback by this key, and with reading the last content of tape (in 8 seconds), content that can tape is last about 8 seconds and then with reading content typing successively storer.Immediately by both sound of resetting, the user can correct the sound of oneself afterwards.Here it is with reading function.

4, relatively: trigger P3, make Q3 put 1, all the other triggers are put O, and R/W is a low level, and ic chip 1 is in the endless track sound recording state.K1, PC are high level and make K1 and T1 conducting respectively, the tape playback, and signal enters A2 and A3, and K2 connects simultaneously, and microphone signal enters ic chip simultaneously by K2 and tape signal and carries out sound mixing.The user wore earphone and followed tape to read aloud together this moment, then both can be mixed typing ic chip 1 simultaneously, if trigger playback key P4 with the typing content playback again, the reader just hears the difference of oneself pronunciation and original pronunciation.

In sum, the utlity model has simple in structure, dependable performance, diverse in function, be used with magnetic tape sound reproducer, can realize repetition easily, with reading the tape playback, outer record, relatively waiting function of language learning, be suitable for and the supporting use of all kinds of magnetic tape sound reproducers, is a kind of good aid that improves language learning efficiency.

Claims (2)

1, magnetic tape sound reproducer function of language learning extender, comprise logic control circuit 1, solid language playback circuitry 2, magnetic tape sound reproducer power switch circuit 3, signal selecting circuit 4, microphone amplifying circuit 5, filter amplification circuit 6, the output one tunnel of signal selecting circuit 4 connects solid language recording playback electricity 2, and another road connects filtering and amplifies 6, and the output of solid language playback circuitry 2 connects the input end of filter amplification circuit 6, the output of microphone amplifying circuit 5 connects the input of signal selecting circuit 4, solid language playback circuitry 2, magnetic tape sound reproducer power switch 3, the input of signal selecting circuit 4 are controlled in the output that it is characterized in that logic control circuit 1 respectively.

2, magnetic tape sound reproducer function of language learning extender according to claim 1 is characterized in that logic control circuit 1 by switch P 1-P4, trigger Q1-Q4, resistance R 15-R18 forms, and solid language playback circuitry 2 is by ic chip 1, IC2, resistance R 1, R2, capacitor C 1-C4, C10, C11, diode D1, D2 forms, and tape player-recorder power switch 3 is by resistance R 14, triode T1, magnetic tape sound reproducer power interface J2 forms, and signal selecting circuit 4 is made up of K switch 1-K3, and microphone amplifying circuit 5 is by microphone MIC, resistance R 12, R13, capacitor C 13-C15, operational amplifier A 4 is formed, and filter amplification circuit 6 is by operational amplifier A 1-A3, resistance R 3-R11, capacitor C 5-C9, C12, potentiometer W, ic chip 3, IC4, switch S 1, loudspeaker SP, magnetic tape sound reproducer earphone interface J1 forms.

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