CN206601746U - Zero queuing system - Google Patents
Zero queuing system Download PDFInfo
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- CN206601746U CN206601746U CN201720230625.6U CN201720230625U CN206601746U CN 206601746 U CN206601746 U CN 206601746U CN 201720230625 U CN201720230625 U CN 201720230625U CN 206601746 U CN206601746 U CN 206601746U
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Abstract
The utility model discloses a kind of Zero queuing system, including queue machine, camera, ceiling loudspeaker, centralized displaying screen, signal controller, DVR, power amplifier and calling set, the output signal of the camera is transmitted to DVR, DVR is connected with queue machine, the queue machine is connected with power amplifier, the output end of the power amplifier is connected with ceiling loudspeaker, the signal controller output end is connected with centralized displaying screen, the signal controller is connected with queue machine and calling set respectively, amplifying circuit built in the power amplifier, including FET T1, triode T2 and transport and placing device A1.By being improved to the amplifying circuit in power amplifier so that the multiple of power amplification is appropriate, so as to solve that sound is sharp or unsharp problem.
Description
Technical field
The utility model is related to electronic device field, more particularly to Zero queuing system.
Background technology
Queue machine is widely used in the service organizations such as hospital, bank, existing queuing system in actual use, because of work(
Amplifying power sets improper in rate amplifier, deposits that sound after amplification is sharp or unsharp problem.
Utility model content
In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide Zero queuing system, and it can be solved
Sound is sharp or unsharp problem.
The purpose of this utility model is realized using following technical scheme：
A kind of Zero queuing system, including it is queue machine, camera, ceiling loudspeaker, centralized displaying screen, signal controller, hard
Disk video recorder, power amplifier and calling set, the output signal of the camera are transmitted to DVR, DVR with
Queue machine is connected, and the queue machine is connected with power amplifier, and the output end of the power amplifier is connected with ceiling loudspeaker, described
Signal controller output end is connected with centralized displaying screen, and the signal controller is connected with queue machine and calling set respectively, the work(
Amplifying circuit built in rate amplifier, including FET T1, triode T2 and transport and placing device A1, the grid of the FET T1
Series resistance R1 and resistance R3, electric capacity C4 and resistance R3 be simultaneously between series capacitance C1, the FET T1 grid and source electrode
Connection, series capacitance C3 between FET T1 drain electrode and triode T2 base stage, between FET T1 drain electrode and ground according to
Secondary series resistance R2 and electric capacity C2, series resistance R2, triode between FET T1 drain electrode and triode T2 emitter stage
Series resistance R4 between T2 base stage and emitter stage, triode T2 emitter stage and the positive pole of dc source are connected, triode T2
Base stage and colelctor electrode between series resistance R5 and resistance R6, the node between resistance R5 and resistance R6 is connected to ground, triode
Series capacitance C5 between T2 colelctor electrode and transport and placing device A1 inverting input, triode T2 colelctor electrode are same with transport and placing device A1's
Series resistance R8 between series resistance R6 between phase input, transport and placing device A1 in-phase input end and ground, transport and placing device A1's is anti-phase
Series resistance R7 between input and output end, electric capacity C6 is in parallel with resistance R7, between transport and placing device A1 inverting input and ground
Series resistance R9, the output end of transport and placing device is the output end of amplifying circuit.
It is preferred that, the resistance value of the resistance R1 is that 1M Ω, the resistance R2 resistance value are 470 Ω, the resistance R3
Resistance value be that 1K Ω, resistance R4 resistance value is that 270K Ω, resistance R5 resistance value is 270K Ω, the resistance
R6 resistance value is that 47K Ω, the resistance R7 resistance value are that 100K Ω, resistance R8 resistance value is 100K Ω, described
Resistance R9 resistance value is 1K Ω.
It is preferred that, the capacitance of the electric capacity C1 is 1nF, and the capacitance of the electric capacity C2 is 100nF, the electric capacity C3's
Capacitance is 1nF, and the capacitance of the electric capacity C4 is 1nF, and the capacitance of the electric capacity C5 is 1nF, the electric capacity of the electric capacity C6
It is worth for 22pF.
Compared with prior art, the beneficial effects of the utility model are：
The technical program to the amplifying circuit in power amplifier by being improved so that the multiple of power amplification is fitted
When so as to solve that sound is sharp or unsharp problem.
Brief description of the drawings
Fig. 1 is the theory diagram of the Zero queuing system described in the utility model embodiment；
Fig. 2 is the electronic circuitry of the amplifying circuit described in the utility model embodiment.
Embodiment
Below, with reference to accompanying drawing and embodiment, the utility model is described further：
As shown in figure 1, a kind of Zero queuing system, including queue machine, camera, ceiling loudspeaker, centralized displaying screen, signal
Controller, DVR, power amplifier and calling set, the output signal of camera are transmitted to DVR, hard disk record
Camera is connected with queue machine, and queue machine is connected with power amplifier, and the output end of the power amplifier is connected with ceiling loudspeaker, letter
Number controller output end is connected with centralized displaying screen, and the signal controller is connected with queue machine and calling set respectively, power amplification
Amplifying circuit built in device, as shown in Fig. 2 including FET T1, triode T2 and transport and placing device A1, FET T1 grid
Series resistance R1 and resistance R3 between series capacitance C1, FET T1 grid and source electrode, electric capacity C4 are in parallel with resistance R3, field
Series capacitance C3 between effect pipe T1 drain electrode and triode T2 base stage, is sequentially connected in series between FET T1 drain electrode and ground
Series resistance R2 between resistance R2 and electric capacity C2, FET T1 drain electrode and triode T2 emitter stage, triode T2 base
Series resistance R4 between pole and emitter stage, triode T2 emitter stage and the positive pole of dc source are connected, triode T2 base stage
The series resistance R5 and resistance R6 between colelctor electrode, the node between resistance R5 and resistance R6 is connected to ground, triode T2 collection
Series capacitance C5 between electrode and transport and placing device A1 inverting input, triode T2 colelctor electrode and transport and placing device A1 homophase input
Series resistance R8 between series resistance R6 between end, transport and placing device A1 in-phase input end and ground, transport and placing device A1 inverting input
The series resistance R7 between output end, electric capacity C6 is in parallel with resistance R7, series electrical between transport and placing device A1 inverting input and ground
R9 is hindered, the output end of transport and placing device is the output end of amplifying circuit.
Wherein, resistance R1 resistance value is 1M Ω, and resistance R2 resistance value is 470 Ω, and resistance R3 resistance value is 1K Ω,
Resistance R4 resistance value is 270K Ω, and resistance R5 resistance value is 270K Ω, and resistance R6 resistance value is 47K Ω, resistance R7's
Resistance value is 100K Ω, and resistance R8 resistance value is 100K Ω, and resistance R9 resistance value is 1K Ω.
Electric capacity C1 capacitance is 1nF, and electric capacity C2 capacitance is 100nF, and electric capacity C3 capacitance is 1nF, electric capacity C4
Capacitance be 1nF, electric capacity C5 capacitance is 1nF, and electric capacity C6 capacitance is 22pF.
It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various
It is corresponding to change and deformation, and all these change and deformation should all belong to the protection of the utility model claim
Within the scope of.
Claims (3)
1. a kind of Zero queuing system, including queue machine, camera, ceiling loudspeaker, centralized displaying screen, signal controller, hard disk
Video recorder, power amplifier and calling set, the output signal of the camera are transmitted to DVR, DVR and row
Team's machine connection, the queue machine is connected with power amplifier, and the output end of the power amplifier is connected with ceiling loudspeaker, the letter
Number controller output end is connected with centralized displaying screen, and the signal controller is connected with queue machine and calling set respectively, and its feature exists
In, the amplifying circuit built in the power amplifier, including FET T1, triode T2 and transport and placing device A1, the field-effect
Series resistance R1 and resistance R3, electric capacity C4 between pipe T1 gate series electric capacity C1, the FET T1 grid and source electrode
It is in parallel with resistance R3, series capacitance C3 between FET T1 drain electrode and triode T2 base stage, FET T1 drain electrode
Resistance R2 and electric capacity C2, series resistance between FET T1 drain electrode and triode T2 emitter stage are sequentially connected in series between ground
Series resistance R4 between R2, triode T2 base stage and emitter stage, triode T2 emitter stage and the positive pole of dc source are connected,
Series resistance R5 and resistance R6 between triode T2 base stage and colelctor electrode, the node between resistance R5 and resistance R6 connects with ground
Connect, series capacitance C5 between triode T2 colelctor electrode and transport and placing device A1 inverting input, triode T2 colelctor electrode and fortune
Put series resistance R6 between device A1 in-phase input end, series resistance R8, amplifier between transport and placing device A1 in-phase input end and ground
Series resistance R7 between device A1 inverting input and output end, electric capacity C6 are in parallel with resistance R7, transport and placing device A1 anti-phase input
Series resistance R9 between end and ground, the output end of transport and placing device is the output end of amplifying circuit.
2. Zero queuing system according to claim 1, it is characterised in that the resistance value of the resistance R1 is 1M Ω, institute
The resistance value for stating resistance R2 is 470 Ω, and the resistance value of the resistance R3 is that 1K Ω, the resistance R4 resistance value are 270K Ω,
The resistance value of the resistance R5 is that 270K Ω, the resistance R6 resistance value are that 47K Ω, resistance R7 resistance value is 100K
Ω, the resistance R8 resistance value are that 100K Ω, the resistance R9 resistance value are 1K Ω.
3. Zero queuing system according to claim 1, it is characterised in that the capacitance of the electric capacity C1 is 1nF, described
Electric capacity C2 capacitance is 100nF, and the capacitance of the electric capacity C3 is 1nF, and the capacitance of the electric capacity C4 is 1nF, the electricity
The capacitance for holding C5 is 1nF, and the capacitance of the electric capacity C6 is 22pF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720230625.6U CN206601746U (en) | 2017-03-09 | 2017-03-09 | Zero queuing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720230625.6U CN206601746U (en) | 2017-03-09 | 2017-03-09 | Zero queuing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206601746U true CN206601746U (en) | 2017-10-31 |
Family
ID=60146986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720230625.6U Active CN206601746U (en) | 2017-03-09 | 2017-03-09 | Zero queuing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206601746U (en) |
-
2017
- 2017-03-09 CN CN201720230625.6U patent/CN206601746U/en active Active
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