CN204145416U - A kind of 2ASK demodulator circuit - Google Patents
A kind of 2ASK demodulator circuit Download PDFInfo
- Publication number
- CN204145416U CN204145416U CN201420591602.4U CN201420591602U CN204145416U CN 204145416 U CN204145416 U CN 204145416U CN 201420591602 U CN201420591602 U CN 201420591602U CN 204145416 U CN204145416 U CN 204145416U
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- resistor
- capacitor
- triode
- operational amplifier
- transistor
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- 239000003990 capacitor Substances 0.000 claims 16
- 238000001914 filtration Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Abstract
本实用新型公开了一种2ASK解调电路，包括带通滤波电路、整流滤波电路和比较电路，带通滤波电路包括电阻R1、三极管Q1和电感L，整流滤波电路包括二极管D1、电容C7和电阻R8，比较电路包括电阻R7和运算放大器U1。本实用新型通过使用价格低廉的运算放大器U1以及一些电阻电感元件，极大控制了成本，且能在无外部干扰的情况下，实现解调后的误码率为0。
The utility model discloses a 2ASK demodulation circuit, which comprises a band-pass filter circuit, a rectification filter circuit and a comparison circuit. R8, the comparison circuit includes resistor R7 and operational amplifier U1. The utility model greatly controls the cost by using the cheap operational amplifier U1 and some resistance and inductance elements, and can realize the bit error rate after demodulation to be 0 without external interference.
Description
Technical field
The utility model relates to a kind of demodulator circuit, specifically a kind of 2ASK demodulator circuit.
Background technology
In digital communication systems, because digital signal has abundant low-frequency component, wireless transmission or long-distance cable transmission should not be carried out, thus the same with analog-modulated, need baseband signal to be carried out high frequency sinusoidal modulation, i.e. digital modulation.Prior art is to the demodulation of digital modulation, there is a variety of mode, but the error rate is 0 after most of demodulation mode needs very complicated circuit to realize demodulation, cost is very high, the utility model aims to provide that a kind of circuit structure is simple, the 2ASK demodulator circuit of low cost of manufacture with the error rate after realizing demodulation for 0.
Utility model content
The purpose of this utility model is to provide that a kind of structure is simple, the 2ASK demodulator circuit of low cost of manufacture, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of 2ASK demodulator circuit, comprise bandwidth-limited circuit, current rectifying and wave filtering circuit and comparison circuit, described bandwidth-limited circuit comprises resistance R1, triode Q1 and inductance L, described current rectifying and wave filtering circuit comprises diode D1, electric capacity C7 and resistance R8, and described comparison circuit comprises resistance R7 and operational amplifier U1.
Described operational amplifier U1 pin 1 connects output, operational amplifier U1 pin 2 is contact resistance R10 and resistance R11 respectively, operational amplifier U1 pin 4 ground connection, operational amplifier U1 pin 3 contact resistance R7, operational amplifier U1 pin 8 connects electric capacity C3 respectively, electric capacity C4, triode Q2 collector electrode, triode Q4 collector electrode, triode Q5 collector electrode, triode Q3 collector electrode, resistance R4, electric capacity C1, inductance L, resistance R1 and power supply VCC, the described electric capacity C3 other end connects the electric capacity C4 other end and ground connection, the described resistance R1 other end connects electric capacity C2 respectively, resistance R2 and triode Q1 base stage, the electric capacity C2 other end connects input, described resistance R2 other end contact resistance R3 ground connection, resistance R3 other end connecting triode Q1 emitter, triode Q1 collector electrode connects the inductance L other end respectively, the electric capacity C1 other end, the resistance R4 other end, triode Q4 base stage and triode Q5 base stage, triode Q4 emitter connecting triode Q2 base stage, triode Q2 emitter is contact resistance R5 and electric capacity C6 respectively, the electric capacity C6 other end connects inductance L 1 and diode D1 positive pole respectively, diode D1 negative pole connects electric capacity C7 respectively, resistance R8 and the resistance R7 other end, the resistance R8 other end connects the electric capacity C7 other end respectively, inductance L 1 other end and the resistance R5 other end ground connection, described triode Q5 emitter connecting triode Q3 base stage, triode Q3 emitter connects electric capacity C5 and resistance R6 respectively, the electric capacity C5 other end connects inductance L 2 and diode D2 positive pole respectively, diode D2 negative pole connects electric capacity C3 and the resistance R10 other end respectively, the electric capacity C3 other end is the contact resistance R11 other end respectively, inductance L 2 other end and the resistance R6 other end ground connection.
As the utility model further scheme: described operational amplifier U1 model is LM258AH.
Compared with prior art, the beneficial effects of the utility model are: the utility model is by using cheap operational amplifier U1 and some resistance-inductance elements, greatly control cost, and can when without external disturbance, realizing the error rate after demodulation is 0.
Accompanying drawing explanation
Fig. 1 is the circuit of 2ASK demodulator circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of 2ASK demodulator circuit, comprise bandwidth-limited circuit, current rectifying and wave filtering circuit and comparison circuit, bandwidth-limited circuit comprises resistance R1, triode Q1 and inductance L, current rectifying and wave filtering circuit comprises diode D1, electric capacity C7 and resistance R8, and comparison circuit comprises resistance R7 and operational amplifier U1.
Operational amplifier U1 pin 1 connects output, operational amplifier U1 pin 2 is contact resistance R10 and resistance R11 respectively, operational amplifier U1 pin 4 ground connection, operational amplifier U1 pin 3 contact resistance R7, operational amplifier U1 pin 8 connects electric capacity C3 respectively, electric capacity C4, triode Q2 collector electrode, triode Q4 collector electrode, triode Q5 collector electrode, triode Q3 collector electrode, resistance R4, electric capacity C1, inductance L, resistance R1 and power supply VCC, the electric capacity C3 other end connects the electric capacity C4 other end and ground connection, the resistance R1 other end connects electric capacity C2 respectively, resistance R2 and triode Q1 base stage, the electric capacity C2 other end connects input, resistance R2 other end contact resistance R3 ground connection, resistance R3 other end connecting triode Q1 emitter, triode Q1 collector electrode connects the inductance L other end respectively, the electric capacity C1 other end, the resistance R4 other end, triode Q4 base stage and triode Q5 base stage, triode Q4 emitter connecting triode Q2 base stage, triode Q2 emitter is contact resistance R5 and electric capacity C6 respectively, the electric capacity C6 other end connects inductance L 1 and diode D1 positive pole respectively, diode D1 negative pole connects electric capacity C7 respectively, resistance R8 and the resistance R7 other end, the resistance R8 other end connects the electric capacity C7 other end respectively, inductance L 1 other end and the resistance R5 other end ground connection, triode Q5 emitter connecting triode Q3 base stage, triode Q3 emitter connects electric capacity C5 and resistance R6 respectively, the electric capacity C5 other end connects inductance L 2 and diode D2 positive pole respectively, diode D2 negative pole connects electric capacity C3 and the resistance R10 other end respectively, the electric capacity C3 other end is the contact resistance R11 other end respectively, inductance L 2 other end and the resistance R6 other end ground connection.
Operational amplifier U1 model is LM258AH.
Operation principle of the present utility model is: in Fig. 1, bandwidth-limited circuit adopts the common-collector amplifier of base bleeder biasing circuit, signal inputs from base stage, emitter exports, electric capacity C7 is the coupling capacitance of input, triode by controlling the electric current of the electric current collector electrode of base stage, can reach the object of amplification, and bandwidth-limited circuit is the circuit shielding other frequency ranges while a permission special frequency channel ripple passes through.The bandwidth-limited circuit of this circuit utilizes LC resonant circuit, this circuit is the active filter circuit of band amplifier, LC resonant circuit can play the unwanted clutter of filtering, harmonic wave, select the effect of the frequency of needs, band pass filter namely utilizes this to be used for work, and in upper Fig. 1, inductance L 1 has choked flow effect, tuning with effects such as frequency-selectings.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420591602.4U CN204145416U (en) | 2014-09-26 | 2014-09-26 | A kind of 2ASK demodulator circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420591602.4U CN204145416U (en) | 2014-09-26 | 2014-09-26 | A kind of 2ASK demodulator circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204145416U true CN204145416U (en) | 2015-02-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420591602.4U Expired - Fee Related CN204145416U (en) | 2014-09-26 | 2014-09-26 | A kind of 2ASK demodulator circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204145416U (en) |
-
2014
- 2014-09-26 CN CN201420591602.4U patent/CN204145416U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150204 Termination date: 20150926 |
|
| EXPY | Termination of patent right or utility model |