CN2363344Y - Follow reading sound controller for speech repeatedly reading apparatus - Google Patents

Abstract

The utility model relates to a follow reading sound controlling device of a language repeater. The follow reading sound controlling device is provided with a signal output channel I from an A/D and a D/A converters to an audio amplification isolation circuit, and a signal output channel II which is outputted from a transmitter amplification circuit to the audio amplification isolation circuit, wherein, an electronic switch B and an electronic switch A are arranged on the two signal output channels. An output signal of the transmitter amplification circuit is also used as a control signal for each electronic switch, namely, the output signal is used as a level conversion electronic switch C which outputs a signal by a switch three-electrode pipe and a switch pipe. And the output terminal of the electronic switch C is respectively connected with the control terminals of the electronic switch B and the electronic switch A. The utility model accomplishes the automatic switching of a follow reading function according to the size of a signal picked by a transmitter. The follow reading sound controlling device has the advantage of simple operation, and can efficiently enhance learning efficiency and learning quality.

Description

Sound-controlled apparatus is read in following of language playback device

The learning machine that is particularly suitable for learning a language also is called language playback device, the utility model relates to this language playback device is had automatically with the electronics sound-controlled apparatus of reading translation function.

Language playback device is the best instrument that people learn foreign languages.Its composition also includes the CPU single-chip microcomputer that A/D, D/A converter, storer, output, input audio signal amplify buffer circuit and control its operate as normal except that the earphone jack of the magnetic head that includes general cassette player, playback integrated circuit and output signal.At present, have with reading function, promptly hear oneself pronunciation and recording substance contrast by earphone for making all kinds of language playback devices, and recorded content and forward to reading contrast from listening, the user needs twice key conversion continually, is prone to maloperation, not only influence learning efficiency, also can reduce learning interest.Therefore, prior art and imperfect.

Goal of the invention of the present utility model is to provide a kind of and only picks up the external sound signal through microphone and can realize automatically with reading translation function speech language repeater with reading sound-controlled apparatus.

Language playback device of the present utility model, its acoustic control is to be realized by following overall technical architecture with reading translation function automatically, this device comprises and is provided with A/D, D/A converter and audio frequency amplify the signal output channels I of buffer circuit formation and the audio frequency that outputs signal to of microphone amplifying circuit amplifies the signal output channels II that buffer circuit constitutes, the output signal of two passages is sent into the playback integrated circuit, respectively be provided with an electronic switch B on two passages, A, the output signal of microphone amplifying circuit is also as the control signal of each electronic switch, promptly through switch triode and its output signal level conversion electron switch C, its output terminal links to each other with the control end of electronic switch B and A respectively.

In technique scheme, be provided with electronic switch D between prime amplifier input end in the playback integrated circuit and the machine operation control end, the control end of electronic switch D links to each other with the level conversion end of electronic switch C.

Provided by the utility model being equipped with the language playback device of reading sound-controlled apparatus, be the extraneous volume control electronic switch that picks up by microphone fully, realize the automatic conversion of signal output channels I, II, thereby finish with the automatic conversion of reading function, need not to resemble existing all kinds of language playback device and must carry out loaded down with trivial details hand switch operation, it is more handy that application person is used, thereby improved learning efficiency greatly, strengthens learning interest.

Describe technology contents of the present utility model in detail below in conjunction with accompanying drawing.

Fig. 1 is the integrated circuit schematic diagram of this language playback device

Fig. 2 is the circuit theory diagrams of reading sound-controlled apparatus of following wherein.

Language playback device as shown in the figure, include the common cassette player structure that magnetic head B2, B3, playback integrated circuit LAG665F and earphone output plughole P3 form, also include A/D, D/A converter TC8831F and storer 514100 and CPU single-chip microcomputer PIC16C54, the effect of A/D, D/A converter TC8831F has two: the one, and the sound signal of amplifying through amplifier circuit for sound frequency signal UA9637A1 that magnetic head is picked up is converted to digital signal, can be stored to then in the storer 514100; The 2nd, the piece of digital conversion of signals that storer 514100 is stored is an audio analog signals, this simulating signal outputs to playback integrated circuit LAG665F through the signal output channels I that audio frequency amplifies buffer circuit UA9637A2, and this passage I is provided with controllable electronic switch B.Wherein with read sound-controlled apparatus be by microphone MIC after coupling capacitance C16, C21 are coupled to amplifying circuit, it amplifies output signal and divides two-way, one the tunnel sends into audio frequency through attenuator circuit, controllable electronic switch A amplifies buffer circuit UA9637A2, form signal output channels II, one the tunnel then as the control signal of each electronic switch, it is through coupling capacitance C20 coupling input switch triode G4, and the collector output of this triode G4 is as the control end of electronic switch B and level conversion electronic switch C.The end ground connection of electronic switch C, another level conversion end is as the control end of electronic switch A.Also be provided with controllable electronic switch D between control end the 22nd pin of the prime amplifier input end of power end and playback integrated circuit LAG665F and machine operation and the 18th pin, its control end links to each other with the level conversion end of electronic switch C.In the present embodiment, what electronic switch was selected for use is 4066 integrated.

This with the course of work of reading sound-controlled apparatus is: the power switch S5 of closed this device starts this sound-controlled apparatus.When microphone MIC picks up extraneous volume when enough big, switch triode G4 conducting, its collector output output low level then, electronic switch B, C disconnects, the signal output channels I of TC8831F is blocked, the high level that the level conversion end of electronic switch C is exported makes electronic switch A and D conducting, the tired signal of the sound that microphone is picked up is sent among the playback integrated circuit LAG665F through the signal output channels II of attenuator circuit and connection, externally output, simultaneously, electronic switch D is changed to noble potential with preposition amplification input end the 22nd pin and machine operation control end the 18th pin of playback integrated circuit LAG665F, close its prime amplifier, motor stop, cut off tape signal, at this moment can change the pronunciation of hearing oneself by earphone automatically over to from the tape tone playing state.When arriving to a certain degree a little less than the extraneous volume that microphone MIC picks up, this can select to set its boundary by component parameters, switch triode G4 is ended, the high level of its collector output output makes the electronic switch B conducting on electronic switch C and the signal output channels II, then the signal of 8831F may be by passage II output, switch C level conversion end transfers low level to, make controlled electronic switch A, D disconnects, opened the prime amplifier of playback integrated circuit LAG665F, machine operation, shutoff signal output channel I then can transfer the tape playback automatically to or the memory contents of storer 514100 is exported broadcast simultaneously.

In present technique, wherein between microphone amplifying circuit and signal output channels II, be provided with attenuator circuit, this attenuator circuit can adopt resistor voltage divider circuit.But in order to reduce noise effectively, to improve tonequality, in the present embodiment, this attenuator circuit is to be made of capacitor C 18, C19 series connection, by series connection node output audio amplifying signal.

In the present embodiment, the control end of electronic switch is equipped with filter capacitor C14 or C2, in order that the erasure signal shake strengthens its interference free performance.Wherein the resistance of the collector operating resistance R8 of switch triode G4 should be enough big, promptly be not less than 50K Ω, so that when switching tube G4 conducting, filter capacitor C14 discharges rapidly, and electronic switch is moved rapidly, when switching tube G4 ends, C14 can slowly charge, prevent when language is normally made pauses in reading unpunctuated ancient writings, also make the electronic switch action, improve the reliability of this device work.

Claims (5)

1, sound-controlled apparatus is read in following of a kind of language playback device, its special domestic animal is that this device is for being provided with A/D, D/A converter and audio frequency amplify the signal output channels I of buffer circuit formation and the audio frequency that outputs signal to of microphone amplifying circuit amplifies the signal output channels II that buffer circuit constitutes, the output signal of two passages is sent into the playback integrated circuit, respectively be provided with an electronic switch B on two passages, A, the output signal of microphone amplifying circuit is also as the control signal of each electronic switch, promptly through switch triode (G4) and its output signal level conversion electron switch C, its output terminal links to each other with the control end of electronic switch B and A respectively.

2, according to claim 1 with reading sound-controlled apparatus, it is characterized in that between the prime amplifier input end of playback integrated circuit and Electric Machine Control end and power end, being provided with electronic switch D, the level conversion end of electronic switch C is as the control end of switch D.

3, according to claim 1 with reading sound-controlled apparatus, it is characterized in that between microphone amplification circuit output end and signal output channels II, being provided with the attenuator circuit that is composed in series by electric capacity (C18, C19).

4, according to claim 1 with reading sound-controlled apparatus, it is characterized in that the control end of each electronic switch is parallel with filter capacitor (C14, C2).

5, according to claim 1 with reading sound-controlled apparatus, it is characterized in that the resistance of the collector operating resistance (R8) of switch triode (G4) should be less than 50K Ω.

Images