CN207475566U

CN207475566U - A kind of building type photoreceiver

Info

Publication number: CN207475566U
Application number: CN201721572422.1U
Authority: CN
Inventors: 曾凡晶
Original assignee: ZHUHAI BLUEMAX BROADBAND ELECTRONIC Co Ltd
Current assignee: ZHUHAI BLUEMAX BROADBAND ELECTRONIC Co Ltd
Priority date: 2017-11-22
Filing date: 2017-11-22
Publication date: 2018-06-08
Anticipated expiration: 2027-11-22

Abstract

The utility model discloses a kind of building type photoreceivers, it is desirable to provide a kind of power consumption is high, level output is high, calorific value is few, the building type photoreceiver of service life length.The utility model includes CPU, low-power light receiving unit, light AGC control unit and electricity adjust balanced unit, the low-power light receiving unit, the smooth AGC control unit and the electricity adjust balanced unit to be electrically connected with the CPU, the low-power light receiving unit is electrically connected with the smooth AGC control unit, the smooth AGC control unit adjusts balanced unit to be electrically connected with the electricity, level-one amplifying unit is provided between the low-power light receiving unit and the smooth AGC control unit, the smooth AGC control unit and the electricity are provided with two level amplifying unit between adjusting balanced unit, the electricity adjusts balanced unit to be also connected with three-level amplifying unit and level Four amplifying unit in turn.The utility model is applied to the technical field of cable television system optical transmission device.

Description

A kind of building type photoreceiver

Technical field

The utility model is related to the technical field of cable television system optical transmission device, more particularly to a kind of building type light connects Receipts machine.

Background technology

Low-power consumption high level output type building photoreceiver refers to through fiber distribution network, and the light of fiber to the floor is believed Number be transformed into radiofrequency signal, then reach high level, high non-linearity index radio signal transmission to user family television set.

The building photoreceiver of all suppliers, high level output can accomplish that nonlinear indicator is also fine before this, Power consumption is high only, this serious problem of generating heat can't resolve, and particularly summer casing fever is more serious, dare not be touched at all with hand Shell.

Utility model content

Technical problem to be solved in the utility model is to have overcome the deficiencies of the prior art and provide a kind of power consumption height, electricity Flat output is high, calorific value is few, the building type photoreceiver of service life length.

Technical solution is used by the utility model：The utility model includes CPU, low-power light receiving unit, light AGC Control unit and electricity adjust balanced unit, and the low-power light receiving unit, the smooth AGC control unit and the electricity are adjusted balanced single Member is electrically connected with the CPU, and the low-power light receiving unit is electrically connected with the smooth AGC control unit, the institute State light AGC control unit adjusts balanced unit to be electrically connected with the electricity, and the low-power light receiving unit is controlled with the smooth AGC Level-one amplifying unit is provided between unit, the smooth AGC control unit and the electricity are provided with two level between adjusting balanced unit Amplifying unit, the electricity adjust balanced unit to be also sequentially connected three-level amplifying unit and level Four amplifying unit.

Further, the low-power light receiving unit is the PIN reception pipes for having the function of low power optical receiving.

Further, the level-one amplifying unit, the two level amplifying unit and the three-level amplifying unit are low noise Sound amplifies IC circuits, and the level Four amplifying unit amplifies IC circuits for low-power consumption height output.

Further, the utility model further includes luminous power display module, the luminous power display module and CPU electricity Property connection.

Further, the luminous power display module is LED liquid crystal displays.

The beneficial effects of the utility model are：Since the utility model includes CPU, low-power light receiving unit, light AGC controls Unit processed and electricity adjust balanced unit, and the low-power light receiving unit, the smooth AGC control unit and the electricity adjust balanced unit It is electrically connected with the CPU, the low-power light receiving unit is electrically connected with the smooth AGC control unit, described Light AGC control unit adjusts balanced unit to be electrically connected with the electricity, and the low-power light receiving unit and the smooth AGC controls are single Level-one amplifying unit is provided between member, being provided with two level between the smooth AGC control unit and the electricity tune balanced unit puts Big unit, the electricity adjust balanced unit to be also sequentially connected three-level amplifying unit and level Four amplifying unit, so, the utility model is A kind of power consumption is high, level output is high, calorific value is few, the building type photoreceiver of service life length.

Description of the drawings

Fig. 1 is the functional block diagram of the utility model.

Specific embodiment

As shown in Figure 1, in the present embodiment, the utility model includes CPU1, low-power light receiving unit 2, light AGC controls Unit 3 and electricity adjust balanced unit 4, and the low-power light receiving unit 2, the smooth AGC control unit 3 and the electricity are adjusted balanced single Member 4 is electrically connected with the CPU1, and the low-power light receiving unit 2 is electrically connected with the smooth AGC control unit 3, institute State the smooth AGC control unit 3 adjusts balanced unit 4 to be electrically connected with the electricity, the low-power light receiving unit 2 and the light Level-one amplifying unit 5 is provided between AGC control unit 3, the smooth AGC control unit 3 and the electricity are adjusted between balanced unit 4 Two level amplifying unit 6 is provided with, the electricity adjusts balanced unit 4 to be also sequentially connected three-level amplifying unit 7 and level Four amplifying unit 8. In this design, the low-power light receiving unit 2 has the function of low power optical receiving, it can be in -7~+2dBm input optical powers In the range of, the output level and nonlinear indicator that make the utility model are held essentially constant, and are solved fiber to the floor and are existed In the case of low power optical receiving, can normally watch TV image and ensures picture quality；The work of the smooth AGC control unit 3 With input optical power is to ensure that in the range of -7~+2dBm, keep output level invariable；Multistage amplifying unit is employed, Power consumption is reduced using the scheme of current limliting, so as to reach amplifying circuit, reduces fever.

In the present embodiment, the low-power light receiving unit 2 is the PIN reception pipes with luminous power receive capabilities.This In design, the responsiveness of the PIN reception pipes is very high, and input optical power ranging from -7~+2dBm, major function is that light is believed Number it is changed into radiofrequency signal.

In the present embodiment, the level-one amplifying unit 5, the two level amplifying unit 6 and the three-level amplifying unit 7 are equal For low noise amplification IC circuits, the level Four amplifying unit 8 amplifies IC circuits for low-power consumption height output.In this design, amplifier The noise of itself may be very serious to the interference of signal, therefore employs low noise amplification in the low noise amplification IC circuits Device reduces this noise, to improve the signal-to-noise ratio of output；Low-power consumption is employed in the low-power consumption height output amplifies IC circuits Output amplifier reduces the loss of amplifier while output power is ensured；Pass through the low noise amplification IC circuit handles of three-level The radiofrequency signal of the PIN reception pipes output reaches the output level of 90dBuV or so amplification factors after preliminary treatment；Institute The function of stating low-power consumption height output amplification IC circuits is before ensuring that nonlinear indicator reaches national broadcasting and TV cable television standards It puts, the signal level that prime is sent is amplified to the high level output needed for user, so as to meet the needs of users.Meanwhile Under normal power-up working condition, by the specially treated to amplifying IC circuits, the amplification IC circuits in circuit is made to be in always It works under low-power consumption environment, so as to reduce the calorific value of amplification IC circuits, extends the service life of machine, save the power consumption of user Amount.

In the present embodiment, the utility model further includes luminous power display module 9, the luminous power display module 9 and institute State CPU1 electric connections.In this design, the luminous power display module 9 being capable of real-time display equilibrium value and pad value, input light The parameters such as power, output level, built-in temperature convenient for grasping the specific setting of photoreceiver in each node in network, are conducive to Network operation；If the built-in temperature and actual measured value of display are variant, school can be carried out to temperature display value in the machine Standard is allowed to meet actual value, has larger help to remote monitoring accurate perception product working status.

In the present embodiment, the luminous power display module 9 is LED liquid crystal displays.

The operation principle of the utility model：

Having been used in the low-power light receiving unit 2 has the function of the PIN reception pipes of low power optical receiving, can -7~ High target exports in the case of the low optical power of+2dBm, belongs to the best a kind of PIN pipes device of performance in cable industry at present Part, its feature are that ultra-low light power receives, high-responsivity and sensitivity, height output level, it is ensured that high non-linearity index is defeated Go out, also ensure that the picture quality of high target.Circuit theory is the optical fiber input port incoming light signal in photoreceiver, when Optical signal converts optical signals to radiofrequency signal, into the level-one amplifying unit 5 in the luminous power input of -7~+2dBm （Low noise amplification IC circuits）In.

Radiofrequency signal passes through the level-one amplifying unit 5（Low noise amplification IC circuits）Afterwards, the radiofrequency signal of output enters The smooth AGC control unit 3 has decayed by the processed signal of agc circuit after one, and output level is equivalent to a 65dBuV left sides It is right.

Then the radiofrequency signal come out from the smooth AGC control unit 3 passes through the two level amplifying unit 6（Low noise is put Big IC circuits）After amplifying again, balanced unit 4 is adjusted into the electricity, output level is equivalent to 80dBuV or so, described to reach Level Four amplifying unit 8（Low-power consumption height output amplifies IC circuits）Required RF signal strength need to carry out third to radiofrequency signal Grade amplification, so radiofrequency signal need to pass through the three-level amplifying unit 7（Low noise amplification IC circuits）Amplify again, it is desirable that output Level reaches 90dBuV or so for qualification.

The radio frequency output level come out from front three-level low noise amplification IC circuits enters the level Four amplifying unit 8（It is low Power consumption high level amplifies IC circuits）In, pass through the level Four amplifying unit 8（Low-power consumption high level amplifies IC circuits）Promotion, So as to obtain the high level output of 105dBuV in the output terminal of receiver.

Here it is the complete core amplifying circuits of the utility model, and function embodiment is both ways：First, push away power by double After amplifying circuit, output high level, high non-property index radio frequency level；Second is that amplification IC circuits realized in energization work it is low Power consumption, the circuit theory of low fever by amplifying the current limliting processing method of IC to power multiplication, reach reduction power consumption, reduce hair Heat.

The utility model is applied to the technical field of cable television system optical transmission device.

Although the embodiment of the utility model is described with practical solution, do not form the utility model is contained The limitation of justice, for those skilled in the art, according to group of this specification to the modification of its embodiment and with other schemes Conjunction will be apparent from.

Claims

1. a kind of building type photoreceiver, it is characterised in that：It includes CPU（1）, low-power light receiving unit（2）, light AGC control Unit processed（3）And electricity adjusts balanced unit（4）, the low-power light receiving unit（2）, the smooth AGC control unit（3）It is and described Electricity adjusts balanced unit（4）With the CPU（1）It is electrically connected, the low-power light receiving unit（2）It is controlled with the smooth AGC Unit（3）It is electrically connected, the smooth AGC control unit（3）Balanced unit is adjusted with the electricity（4）It is electrically connected, the low-power Light receiving unit（2）With the smooth AGC control unit（3）Between be provided with level-one amplifying unit（5）, the smooth AGC controls list Member（3）Balanced unit is adjusted with the electricity（4）Between be provided with two level amplifying unit（6）, the electricity tune balanced unit（4）Also successively It is connected with three-level amplifying unit（7）With level Four amplifying unit（8）.

2. a kind of building type photoreceiver according to claim 1, it is characterised in that：The low-power light receiving unit （2）For the PIN reception pipes with luminous power receive capabilities.

3. a kind of building type photoreceiver according to claim 2, it is characterised in that：The level-one amplifying unit（5）, institute State two level amplifying unit（6）And the three-level amplifying unit（7）It is low noise amplification IC circuits, the level Four amplifying unit （8）Amplify IC circuits for low-power consumption height output.

4. a kind of building type photoreceiver according to claim 3, it is characterised in that：It further includes luminous power display module （9）, the luminous power display module（9）With the CPU（1）It is electrically connected.

5. a kind of building type photoreceiver according to claim 4, it is characterised in that：The luminous power display module（9） For LED liquid crystal displays.