CN205454064U - Small -size bluetooth speaker based on electron tube is done leadingly - Google Patents
Small -size bluetooth speaker based on electron tube is done leadingly Download PDFInfo
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- CN205454064U CN205454064U CN201521137945.4U CN201521137945U CN205454064U CN 205454064 U CN205454064 U CN 205454064U CN 201521137945 U CN201521137945 U CN 201521137945U CN 205454064 U CN205454064 U CN 205454064U
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Abstract
The utility model provides a small -size bluetooth speaker based on electron tube is done leadingly, includes bluetooth module unit, preamplification unit and power amplifier unit, and the output and the input of preamplification unit of bluetooth module unit are connected, and the output of preamplification unit is connected in power amplifier unit's input, its characterized in that, the preamplification unit be electron tube preamplification unit. The utility model has the advantages that: increase electron tube amplifier circuit as preamplifier, the assorted also has filament voltage, grid and anode voltage supply circuit with it. The most beautiful tone quality, the reduction of full play electron tube exchanges the noise jamming, and filament voltage adopts dc supply to without 6.3V, but adopt 5.9 -6.0V dc supply, make tone quality better.
Description
Technical field
This utility model relates to a kind of making preposition small Bluetooth audio amplifier based on electron tube.
Background technology
Existing existing small Bluetooth audio amplifier pre-amplification circuit is common amplifier and passive amplifying circuit composition, and the major defect existed is that tonequality is bad.
Utility model content
This utility model aims to provide and a kind of makees preposition small Bluetooth audio amplifier based on electron tube, the problem poor to solve tonequality that prior art exists.
The technical solution of the utility model is: a kind of make preposition small Bluetooth audio amplifier based on electron tube, including bluetooth module group unit, pre-amplifier unit and power amplifier unit, the outfan of bluetooth module group unit is connected with the input of pre-amplifier unit, the outfan of pre-amplifier unit connects in the input of power amplifier unit, it is characterized in that, described pre-amplifier unit is electron tube pre-amplifier unit.
Described electron tube pre-amplifier unit includes power circuit, double radiotron amplifying circuit, and the filament voltage outfan of power circuit, grid voltage outfan and anode voltage outfan are connected with filament, grid and the anode of electron tube respectively.
Described power circuit is made up of full-bridge rectifier and π type capacitance-resistance filter, and the outfan of full-bridge rectifier is connected with the input of π shape capacitance-resistance filter, and the outfan of π type capacitance-resistance filter is as described anode voltage outfan；The outfan of π type capacitance-resistance filter after divider resistance dividing potential drop as described grid voltage outfan.
Described double radiotrons use 6N3 electron tube, and the magnitude of voltage of described filament voltage outfan is direct current 5.9-6.0V.
The utility model has the advantages that: increase electron tube amplifying circuit as preamplifier, matched also filament voltage, grid and anode voltage power supply circuits.Giving full play to the most beautiful tone color of electron tube, reduce exchange noise jamming, filament voltage uses direct current supply, and without 6.3V, but using 5.9-6.0V direct current supply so that tonequality is more preferably.
Accompanying drawing illustrates:
Fig. 1 be this utility model circuit totally constitute block diagram；
Fig. 2 is the electrical schematic diagram of bluetooth module group unit embodiment in Fig. 1；
Fig. 3 is the electrical schematic diagram of electron tube front end units embodiment in Fig. 1；
Fig. 4 is the electrical schematic diagram of power amplifier unit embodiment in Fig. 1.
Detailed description of the invention
In order to make utility model purpose of the present utility model, technical scheme and technique effect are clearer, are described further this utility model below in conjunction with detailed description of the invention.Should be understood that specific embodiment described herein and relevant drawings, be only used for explaining this utility model, be not used to limit this utility model.
See Fig. 1～Fig. 4, this utility model is made up of bluetooth module group unit 1, electron tube front end units 2 and power amplifier unit 3, the outfan of bluetooth module group unit 1 is connected with the input of electron tube front end units 2, the outfan of electron tube front end units 2 connects in the input of power amplifier unit 3, and the outfan of power amplifier unit 3 connects speaker (not shown).
Seeing Fig. 2, described bluetooth module group unit 1 includes:
J3 is connected to transformator (not shown) output AC voltage of prime, direct current is become through bridge rectifier MB8S rectification, it is connected to voltage stabilizing IC78L05, output DC voltage 5V point two-way output after E7, C5, C97 filter through R15 current limliting after C6, E14 filtering.
Voltage stabilizing ICU19 is received on one tunnel, and output 3.6V DC voltage is powered to bluetooth module.
The voltage supply of amplifier ICDI02358 is given after R95 current limliting, E5, C94 filtering in another road, and R3 is bluetooth module start voltage；R78, R88 make dividing potential drop, and C95, E4 filter, and make mid-point voltage to amplifier.
Bluetooth module 32,33,34,35 foot output signal couples through C57, C70, C85, C93, R79, R80, R81, R82 ration the power supply and be input to the 2 of DIO2358,3,5,6 feet, R2, R85, C85, C86 make negative feedback, signal exports from 1,7 feet, is connected to J12 output through C92, C96 coupling R89, R94 current limliting.
It is connected to export next stage from J4A after J11 does signal conversion to JK1RCA seat from prime J12 output signal.
Seeing Fig. 3, described electron tube pre-amplifier unit 2 includes:
J4 is connected to the transformator output AC voltage of prime, becomes direct current through bridge rectifier KBP210 rectification, forms pi type filter through C13, R11, C14, and C15 is anti-High-frequency Interference.Filtered DC voltage is received on electron tube TB1 anode 4,6 foot, R12 with R13 connects, R22 series connection R23 as the bias voltage of electron tube 3,7 foot grid as stable quiescent point.Signal is coupled to electron tube 6N3 grid 3,7 foot from C16, C17 from J6 input after R14, R15 pressure limiting with R15, R16 dividing potential drop, signal output exports from negative electrode 2,8 foot of 6N3, R18, R19 are the load resistance of negative electrode 2,8 foot, output signal links the input J8 of potentiometer after J7 is received in C18, C19 coupling, and signal exports next stage from J9 after VR1 makees volume control.The alternating voltage of transformer secondary output output becomes direct current from J5 input through bridge rectifier KBP206 rectification, and C22, C21 filter；After U23, L1 voltage stabilizing, export 5.9V direct current after C20, C24 filter, be connected to filament 1 foot of electron tube, 9 foot ground connection again.
Seeing Fig. 4, described power amplifier unit 3 includes: J1 is connected to the transformator output AC voltage of prime, becomes direct current through bridge rectifier KBP210 rectification, filters through C1 and C2, and C3, C4 make filter High-frequency Interference.
J3 is connected to the AC signal of the volume control potentiometer output of prime, and signal divides two-way after C7, C8 couple, and R5, R6 current limliting, R7, R8 dividing potential drop, after C9, C10 make filter High-frequency Interference, from U1 the 8th, the 13 foot input of IC.C11 with R9 connects, C12 with R10 connects, be respectively connected to the 7th of U1 the, 12 feet as the reverse input of power amplifier A, B, resistance R3, R4 are as the negative feedback resistor of power amplifier.Amplified signal is connected to audio amplifier output sound after the 3 of U1,1 foot output is connected to J2.Electric capacity C5 with R1 connects, C6 Yu R2 is composed in series RC wave filter, is connected to the 1 of U1,3 feet, filters and produces interference signal from audio amplifier.
Above content is to combine concrete preferred implementation further detailed description of the utility model, it is impossible to assert that of the present utility model being embodied as is confined to these explanations.For this utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, its framework form can be flexible and changeable, can be with subseries product.Simply make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that this utility model is determined by the claims submitted to.
Claims (4)
1. one kind is made preposition small Bluetooth audio amplifier based on electron tube, including bluetooth module group unit, pre-amplifier unit and power amplifier unit, the outfan of bluetooth module group unit is connected with the input of pre-amplifier unit, the outfan of pre-amplifier unit connects in the input of power amplifier unit, it is characterized in that, described pre-amplifier unit is electron tube pre-amplifier unit.
The most according to claim 1 make preposition small Bluetooth audio amplifier based on electron tube, it is characterized in that, described electron tube pre-amplifier unit includes power circuit, double radiotron amplifying circuit, and the filament voltage outfan of power circuit, grid voltage outfan and anode voltage outfan are connected with filament, grid and the anode of electron tube respectively.
The most according to claim 2 make preposition small Bluetooth audio amplifier based on electron tube, it is characterized in that, described power circuit is made up of full-bridge rectifier and π type capacitance-resistance filter, the outfan of full-bridge rectifier is connected with the input of π shape capacitance-resistance filter, and the outfan of π type capacitance-resistance filter is as described anode voltage outfan；The outfan of π type capacitance-resistance filter after divider resistance dividing potential drop as described grid voltage outfan.
The most according to claim 3 make preposition small Bluetooth audio amplifier based on electron tube, it is characterised in that described double radiotrons use 6N3 electron tube, and the magnitude of voltage of described filament voltage outfan is direct current 5.9-6.0V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521137945.4U CN205454064U (en) | 2015-12-30 | 2015-12-30 | Small -size bluetooth speaker based on electron tube is done leadingly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521137945.4U CN205454064U (en) | 2015-12-30 | 2015-12-30 | Small -size bluetooth speaker based on electron tube is done leadingly |
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| Publication Number | Publication Date |
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| CN205454064U true CN205454064U (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521137945.4U Active CN205454064U (en) | 2015-12-30 | 2015-12-30 | Small -size bluetooth speaker based on electron tube is done leadingly |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160497A (en) * | 2016-08-19 | 2016-11-23 | 中山市悦辰科技实业有限公司 | A kind of high-frequency electronic pipe booster circuit |
| CN109905809A (en) * | 2019-03-27 | 2019-06-18 | 深圳市火乐科技发展有限公司 | A kind of active audio amplifier |
-
2015
- 2015-12-30 CN CN201521137945.4U patent/CN205454064U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160497A (en) * | 2016-08-19 | 2016-11-23 | 中山市悦辰科技实业有限公司 | A kind of high-frequency electronic pipe booster circuit |
| CN109905809A (en) * | 2019-03-27 | 2019-06-18 | 深圳市火乐科技发展有限公司 | A kind of active audio amplifier |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |