CN1057654C - Frequency-modulated sub-channel high-speed data transmission receiver - Google Patents
Frequency-modulated sub-channel high-speed data transmission receiver Download PDFInfo
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- CN1057654C CN1057654C CN97126118A CN97126118A CN1057654C CN 1057654 C CN1057654 C CN 1057654C CN 97126118 A CN97126118 A CN 97126118A CN 97126118 A CN97126118 A CN 97126118A CN 1057654 C CN1057654 C CN 1057654C
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Abstract
The present invention provides a frequency modulated sub-channel high-speed data transmission receiver. The present invention is characterized in that the present ivnention is composed of a high frequency head, a broadband intermediate amplifying frequency discriminator, a sub-channel band pass wave filter, a frequency shift key control data demodulator, a data output interface circuit, etc. The receiver can be applied to the fields of all frequency modulation broadcasts. When the present invention fully uses a frequency resource of the existing frequency modulation broadcast to play a stereo programme on a main channel by the existing frequency modulation broadcasting station, data communication with the speed of 19.2 kilobits is opened at a sub-channel. The present invention can be used as a stock real-time data analysis receiver or a bank financial information receiver, etc.
Description
The present invention relates to the radio broadcasting field, particularly a kind of frequency-modulated sub-channel high-speed data transmission receiver.
Domestic and international in recent years broad development frequency modulation subchannel broadcasting industry makes full use of existing FM multiplex transmitting station, and the operating frequency multiplex technique is implemented in the above program of transmission two covers on the carrier frequency.This technology enlarges the transmission of Information amount for utilizing limited frequency resource, and aspects such as increase data communication mode all have great economic worth.Along with developing rapidly of subchannel broadcast technology, the way of subchannel increases to 4 the tunnel from 1 the tunnel, and standard develops into independent sideband from double frequency modulation---frequency modulation.Its working method from the language to data, traffic rate from low (1200 baud) to high (19200 baud), for new more vast market has been opened up in the broadcasting of frequency modulation subchannel.
The purpose of this invention is to provide a kind of high sensitivity (40 μ v), high traffic rate (19200 baud), high merit price ratio, low error rate (1 * 10
-5) frequency-modulated sub-channel high-speed data transmission receiver.
Technical solution of the present invention is: frequency-modulated sub-channel high-speed data transmission receiver comprises formations such as tuner, broadband intermediate level frequency discrimination device, subchannel band pass filter, frequency shift keying data demodulator, data output interface circuit.Described tuner RF1 is by 1C1,1C2,1C3, T1 forms frequency selection circuit and is connected on IC1 between antenna socket and the integrated package (TA7358) first pin, simultaneously the height of being made up of electric capacity 1C7 and T2 is put the tank circuit and is connected between IC1 tripod and the 9th pin, signal is put through the height of ic chip 1 inside, mixing, in put the back from the 6th foot meridian capacitor 1C11 and T3 output, microwave triode 1Q1 and be connected on the quartz crystal oscillator X1 of its base stage, 1C14, and be connected on the electric capacity 1C15 of its emitter, 1C16, inductance 1L1 and resistance 1R3, be connected on the inductance T4 and the electric capacity 1C17 of collector electrode, resistance 1R12,1R4 form quartz crystal vibration frequency multiplier circuit.Whole circuit of tuner are installed in one independently in the shielding box.
Broadband intermediate level frequency discrimination device is by two ceramic filter L1 that are connected on triode Q1 base stage and collector electrode respectively, L2 and resistance R 1 are to R5, capacitor C 14, C13 forms the broadband intermediate level circuit, 1 pin of ic chip 2 (CA3189) is received in its output from ceramic filter L2,2 pin are connected C15 with 3 pin, C16, R8,4 pin and 14 pin ground connection, 5 pin link to each other with 15 pin, 9 pin and 8 pin cross-over connection inductance L 3 and T2, C42, R12 forms frequency-discriminating circuit, 10 pin are through filter capacitor C19, C20 ground connection, 11 pin through R11 to positive source, R10 is connected across between 12 pin and 16 pin, 16 pin are through R9, C17 ground connection, the composite signal behind the frequency discrimination is exported through R14 from 6 pin, C38, L6 selects subcarrier signal.
Subcarrier frequency active band-pass filter DT-83 is solidificated on the thick film circuit, and to R206, the active bandwidth-limited circuit of two-stage that capacitor C 201 to C205 is formed constitutes by ic chip 201 (UPC4572) and IC202 (78L05) and resistance R 201.
To R23, capacitor C 25 is to C30 by ic chip 4 (XR2211) and peripheral cell resistance R 17 for the subchannel frequency shift keying demodulator, and light-emitting diode DG and DY form, and the power supply of IC4 provides after by IC5 (78L08) voltage stabilizing.
Data output interface circuit is by ic chip 6 (ICL232) and be connected on capacitor C 22 on its 1,2,3,4,5,6,16 pin, C23, C24, C31, C32 and constitute, and data-signal meets the signal of rs-232 standard behind the 10 pin input shapers from the output of 7 pin.
The invention has the advantages that: it can utilize the frequency resource of existing f-m broadcast station, is implemented on the frequency modulated carrier except broadcasting original stereophonic program, can also increase the high-speed datacasting communication service of one tunnel 19.2 kilobit.After computer is connected, can be used as stock market's real time data analysis receiver or banking business data receiver.Because Circuit Optimization such as the logical filter devices of tuner and the active band of subchannel, make receiver have high sensitivity (40 μ v), two-forty (19.2 kilobit), high merit price ratio, low error rate (1 * 10
-5) etc. advantage.
Below in conjunction with accompanying drawing the present invention is illustrated:
Fig. 1 is a circuit block diagram of the present invention;
Fig. 2 is the embodiments of the invention electrical schematic diagram;
Fig. 3 is RF1 tuner unit line figure of the present invention;
Fig. 4 is subchannel active band-pass filter element circuit figure.
As shown in the figure: the present invention includes tuner, broadband intermediate level frequency discrimination device, subchannel Active band-pass filter, frequency shift keying data demodulator, data output interface circuit etc. Five most of compositions. In order to improve receiving sensitivity, improve traffic rate, reduce mistake Code check all adopts integrated level higher in each circuit, the integrated electric that noise coefficient is littler The road module is as basic circuit. Designed simultaneously the tuner of individual screen, and rectangle The subcarrier frequency active band-pass filter that coefficient is good.
Embodiments of the invention and operation principle are: tuner is by 1C1,1C2,1C3, the frequency selection circuit that T1 forms is connected between antenna socket and ic chip 1 (TA7358) first pin, simultaneously the height of being made up of electric capacity 1C7 and T2 is put the tank circuit and is connected between IC1 tripod and the 9th pin, signal through the height of ic chip 1 inside put, mixing, in put after from the 6th foot meridian capacitor 1C11 and T3 output, microwave triode 1Q1 and be connected on quartz crystal oscillator X1, the 1C14 of its base stage; Be connected on electric capacity 1C15,1C16, inductance 1L1 and the resistance 1R3 of emitter, the inductance T4 and electric capacity 1C17, resistance 1R12, the 1R4 that are connected on collector electrode form quartz crystal vibration frequency multiplier circuit.Whole circuit of tuner are installed in one independently in the shielding box.
Broadband intermediate level frequency discrimination device: form the broadband intermediate level circuit by two ceramic filter L1, L2 being connected on triode Q1 base stage and collector electrode respectively and resistance R 1 to R5, capacitor C 14, C13 etc., 1 pin of ic chip 2 (CA3189) is received in output from ceramic filter L2; 2 pin are connected C15, C16, R8 with 3 pin, 4 pin and 14 pin ground connection, 5 pin link to each other with 15 pin, 9 pin and 8 pin cross-over connection inductance L 3 and T2, C42, R12 form frequency-discriminating circuit, and 10 pin are through filter capacitor C19, C20 ground connection, 11 pin through R11 to positive source, R10 is connected across between 12 pin and 16 pin, and 16 pin are through R9, C17 ground connection, and the composite signal behind the frequency discrimination is selected subcarrier signal from the output of 6 pin through R14, C38, L6.
Subcarrier frequency active band-pass filter DT-83 is cured on the thick film circuit, and by ic chip 2 (UPC4572), IC3 (78L05) and resistance R 201 are to R206, and the active bandwidth-limited circuit of two-stage that capacitor C 201 to C205 is formed constitutes.
To R23, capacitor C 25 is to C30 by ic chip 4 (XR2211) and peripheral cell resistance R 17 for the subchannel frequency shift keying demodulator, and light-emitting diode DG and DY form, and the power supply of IC4 provides after by IC5 (78L08) voltage stabilizing.
Data output interface circuit is by ic chip 6 (ICL232) and be connected on capacitor C 22 on its 1,2,3,4,5,6,16 pin, C23, C24, C31, C32 and constitute, and data-signal import from 10 pin, exports the signal that meets rs-232 standard from 7 pin after the shaping.
Claims (2)
1, a kind of frequency-modulated sub-channel high-speed data transmission receiver comprises tuner, broadband intermediate level frequency discrimination device, subchannel band pass filter, frequency shift keying data demodulator, data output interface circuit; It is characterized in that:
A, described tuner RF1 is by electric capacity (1C1), electric capacity (1C2), electric capacity (1C3), inductance (T1) is formed, the efficient groove of being made up of electric capacity (1C7) and inductance (T2) is pressed against and is connected between the ic chip 1 (TA7358), synchronous signal is efficient through integrated package (IC1) inside, mixing, in put the back from the 6th foot meridian capacitor (1C11) and export in week (T3), microwave triode (1Q1) and be connected on the quartz crystal oscillator (X1) of its base stage, electric capacity (1C14), and be connected on the electric capacity (1C15) of its emitter, electric capacity (1C16), inductance (1L1) and resistance (1R3), be connected on the inductance (T4) and the electric capacity (1C17) of collector electrode, electric capacity (C17) ground connection, the composite signal behind the frequency discrimination is exported through resistance (R14) from 6 pin, electric capacity (C38), inductance (L6) is selected subcarrier signal;
B, described broadband intermediate level frequency discrimination device is two ceramic filters (L1) by base stage that is connected on triode (Q1) respectively and collector electrode, (L2), and resistance (R1) is to (R5), electric capacity (C14), the broadband intermediate level circuit that electric capacity (C13) is formed, 1 pin of integrated package (IC2) CA3189 is received in its output from ceramic filter (L2), 2 pin are connected electric capacity (C15) with 3 pin, electric capacity (C16), resistance (R8), 4 pin and 14 pin ground connection, 5 pin link to each other with 15 pin, 9 pin and 8 pin cross-over connection inductance (L3) and inductance (T2), electric capacity (C42), resistance (R12) is formed frequency-discriminating circuit, 10 pin are through filter capacitor (C19), electric capacity (C20) ground connection, 11 pin through resistance (R11) to positive source, resistance (R10) is connected across between 12 pin and 16 pin, 16 pin are through resistance (R9), electric capacity (C17) ground connection, the composite signal behind the frequency discrimination is exported through resistance (R14) from 6 pin, electric capacity (C38), inductance (L6) is selected subcarrier signal;
C, described subchannel band pass filter (DT-83) are solidificated on the thick film circuit, and the active bandwidth-limited circuit of being made up of integrated package (IC2) UPC4572, integrated package (IC3) 78L05 and resistance (R201) to resistance (R206), electric capacity (C201) to electric capacity (C205) of two-stage constitutes;
D, described frequency shift keying data demodulator are made up of to electric capacity (C30), light-emitting diode (DG) and light-emitting diode (DY) to resistance (R23), electric capacity (C25) integrated package (IC4) XR2211 and peripheral cell resistance (R17), and the power supply of integrated package (IC4) provides after by integrated package (IC5) 78L08 voltage stabilizing;
E, described data output interface circuit by integrated package (IC6) ICL232 and be connected on its 1,2,3,4, electric capacity (C22) on 5,6,16 pin, electric capacity (C23), electric capacity (C24), electric capacity (C31), electric capacity (C32) constitute, data-signal is imported from 10 pin, meets the signal of rs-232 standard after the shaping from the output of 7 pin.
2, frequency-modulated sub-channel high-speed data transmission receiver according to claim 1 is characterized in that: in above-mentioned each circuit respectively application integration piece TA7358, CA3189, UPC4572, XR2211, ICL232 as the basic module of circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97126118A CN1057654C (en) | 1997-12-31 | 1997-12-31 | Frequency-modulated sub-channel high-speed data transmission receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97126118A CN1057654C (en) | 1997-12-31 | 1997-12-31 | Frequency-modulated sub-channel high-speed data transmission receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1189036A CN1189036A (en) | 1998-07-29 |
| CN1057654C true CN1057654C (en) | 2000-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97126118A Expired - Fee Related CN1057654C (en) | 1997-12-31 | 1997-12-31 | Frequency-modulated sub-channel high-speed data transmission receiver |
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|---|---|
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131855A (en) * | 1994-11-30 | 1996-09-25 | 三星电子株式会社 | Multi-broadcast channel selection apparatus |
| CN1140945A (en) * | 1995-01-31 | 1997-01-22 | 松下电器产业株式会社 | Data receiving device |
-
1997
- 1997-12-31 CN CN97126118A patent/CN1057654C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131855A (en) * | 1994-11-30 | 1996-09-25 | 三星电子株式会社 | Multi-broadcast channel selection apparatus |
| CN1140945A (en) * | 1995-01-31 | 1997-01-22 | 松下电器产业株式会社 | Data receiving device |
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| Publication number | Publication date |
|---|---|
| CN1189036A (en) | 1998-07-29 |
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