CN105872316A - High-definition image signal processing system based on constant-current source circuit - Google Patents
High-definition image signal processing system based on constant-current source circuit Download PDFInfo
- Publication number
- CN105872316A CN105872316A CN201610380673.3A CN201610380673A CN105872316A CN 105872316 A CN105872316 A CN 105872316A CN 201610380673 A CN201610380673 A CN 201610380673A CN 105872316 A CN105872316 A CN 105872316A
- Authority
- CN
- China
- Prior art keywords
- amplifier
- pole
- resistance
- electric capacity
- negative pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
Abstract
The invention discloses a high-definition image signal processing system based on a constant-current source circuit. The system is characterized by being mainly composed of a processing chip U, a field-effect tube MOS1, a field-effect tube MOS2, signal input amplifying circuits connected with a BOOT pin and a VCC pin of the processing chip U respectively, the constant-current source circuit connected with the signal input amplifying circuits, and a resistor R5 connected between a grid of the field-effect tube MOS1 and a UGATE pin of the processing chip U in series.
Description
Technical field
The present invention relates to electronic applications, specifically refer to a kind of high-definition image signal transacting based on constant-current source circuit
System.
Background technology
Along with the development of society, image processing system has been widely used in the neck such as recognition of face, photography and vedio recording
Territory；But, there is the biggest defect in current image-signal processing system, the most existing picture signal processes
The interference signal being entrained in picture signal cannot be filtered by system thoroughly so that it is at picture signal
The poor effect of reason, causes image display effect cannot meet the demand of people.
Summary of the invention
It is an object of the invention to overcome traditional existing image-signal processing system cannot be thoroughly to doping
Interference signal in picture signal carries out the defect filtered, it is provided that a kind of high definition figure based on constant-current source circuit
Image signal processing system.
The purpose of the present invention is achieved through the following technical solutions: a kind of high-definition image based on constant-current source circuit is believed
Number processing system, mainly by processing chip U, FET MOS1, FET MOS2, respectively with place
The signal input amplifying circuit that the BOOT pin of reason chip U is connected with VCC pin, inputs with signal
The constant-current source circuit that amplifying circuit is connected, is serially connected in the grid of FET MOS1 and processes chip U's
Resistance R5 between UGATE pin, is serially connected in the grid of FET MOS2 and processes chip U's
Resistance R6 between LGATE pin, negative pole is connected with the drain electrode of FET MOS1, positive pole is through electricity
The electric capacity C4 of ground connection after resistance R7, respectively with FET MOS1, FET MOS2 and process chip
The signal filter circuit that U is connected, and negative pole is connected with signal filter circuit, positive pole is after resistance R4
The electric capacity C3 composition being connected with the FB pin processing chip U.
Described constant-current source circuit is by amplifier P3, amplifier P4, triode VT2, and negative pole is through resistance R14
Afterwards the negative pole with amplifier P3 be connected, positive pole then as the electric capacity C7 of input of this constant-current source circuit,
One end is connected with the positive pole of amplifier P3, the resistance R13 of other end ground connection, is serially connected in amplifier P3's
Resistance R15 between the output of negative pole and amplifier P4, one end is connected with the output of amplifier P4,
The resistance R17 that other end emitter stage with triode VT2 after inductance L1 is connected, positive pole and amplifier
The electric capacity C9 that the negative pole of P4 is connected, negative pole is connected with the base stage of triode VT2, positive pole and amplifier
Electric capacity C8, the P pole that the output of P4 is connected, negative pole then positive pole with amplifier P4 is connected is through resistance
After R16 the output with amplifier P3 be connected, N pole after resistance R18 with the current collection of triode VT2
The diode D3 that pole is connected, and positive pole is connected with the N pole of diode D3, negative pole is as this constant current
The electric capacity C10 composition of the output of source circuit；The output of described constant-current source circuit amplifies electricity with signal input
Road is connected.
Described signal input amplifying circuit is by amplifier P1, and positive pole is connected with the positive pole of amplifier P1, bears
The electric capacity C1 that pole then output with amplifier P1 is connected, one end is connected with the negative pole of amplifier P1,
The resistance R1 of other end ground connection, be serially connected in amplifier P1 output and process chip U VCC pin it
Between resistance R3, N pole with process chip U BOOT pin be connected, P pole defeated with constant-current source circuit
Go out the diode D1 that is connected of end, and minus earth, positive pole after resistance R2 with the P of diode D1
The electric capacity C2 composition that pole is connected；Defeated as this signal input amplifying circuit of the positive pole of described amplifier P1
Enter end, its output negative pole then with electric capacity C2 to be connected.
Described signal filter circuit is by the source of amplifier P2, triode VT1, positive pole and FET MOS1
The electric capacity C5 that pole is connected, negative pole then drain electrode with FET MOS2 is connected, is serially connected in electric capacity C5
Positive pole and the output of amplifier P2 between resistance R8, be serially connected in negative pole and the amplifier of electric capacity C5
Resistance R9 between the positive pole of P2, positive pole is connected with the source electrode of FET MOS2, the electricity of minus earth
Hold C6, the resistance R10 being serially connected between the negative pole of electric capacity C6 and the negative pole of amplifier P2, be serially connected in amplification
Resistance R11 between output and the base stage of triode VT1 of device P2, one end is sent out with triode VT1's
The resistance R12 of ground connection while emitter-base bandgap grading is connected, the other end then negative pole with electric capacity C3 is connected, and P
Pole is connected with the colelctor electrode of triode VT1, N pole is then as two poles of output of this signal filter circuit
Pipe D2 forms；The negative pole of described electric capacity C5 is also connected with the PHASE pin processing chip U；Described
Process the GND pin ground connection of chip U.
Described process chip U is the integrated chip of APW7120.
The present invention compared with the prior art, has the following advantages and beneficial effect:
(1) the interference signal being entrained in picture signal can be filtered by the present invention, improves image letter
Number quality, it is to avoid image display time sonwflake phenomenon occurs.
(2) present invention uses the integrated chip of APW7120 as processing chip, makes the structure of the present invention more
Simply.
(3) input current can be processed by the present invention, so that it is guaranteed that the present invention has constant work electricity
Stream, it is to avoid it produces electromagnetic interference signal during work, greatly improves the stability of the present invention.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the structure chart of the constant-current source circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not
It is limited to this.
Embodiment
As it is shown in figure 1, the high-definition image signal processing system based on constant-current source circuit of the present invention, mainly by
Process chip U, FET MOS1, FET MOS2, respectively with the BOOT processing chip U
The signal input amplifying circuit that pin is connected with VCC pin, the perseverance being connected with signal input amplifying circuit
Current source circuit, is serially connected between the grid of FET MOS1 and the UGATE pin processing chip U
Resistance R5, is serially connected in the electricity between the grid of FET MOS2 and the LGATE pin processing chip U
Resistance R6, negative pole is connected with the drain electrode of FET MOS1, positive pole electric capacity C4 of ground connection after resistance R7,
The signal filter circuit being connected with FET MOS1, FET MOS2 and process chip U respectively,
And negative pole is connected with signal filter circuit, positive pole after resistance R4 with process chip U FB pin phase
The electric capacity C3 composition connected.In order to preferably implement the present invention, the described process preferred APW7120 of chip U
Integrated chip realizes.
Wherein, this signal input amplifying circuit is by amplifier P1, resistance R1, electric capacity C1, resistance R2, electricity
Resistance R3, electric capacity C2 and diode D1 composition.
During connection, the positive pole of electric capacity C1 is connected with the positive pole of amplifier P1, its negative pole then with amplifier P1
Output be connected.One end of resistance R1 is connected with the negative pole of amplifier P1, its other end ground connection.
Resistance R3 is serially connected between the output of amplifier P1 and the VCC pin processing chip U.Diode D1
N pole with process chip U BOOT pin be connected, its P pole is connected with the output of constant-current source circuit
Connect.The minus earth of electric capacity C2, its positive pole P pole with diode D1 after resistance R2 is connected.Institute
State the positive pole input as this signal input amplifying circuit of amplifier P1, its output then with electric capacity C2
Negative pole be connected.
It addition, this signal filter circuit is by amplifier P2, triode VT1, electric capacity C5, electric capacity C6, electricity
Resistance R8, resistance R9, resistance R10, resistance R11, resistance R12 and diode D2 composition.
During connection, the positive pole of electric capacity C5 is connected with the source electrode of FET MOS1, its negative pole is then imitated with field
Should the drain electrode of pipe MOS2 be connected.Resistance R8 is serially connected in positive pole and the output of amplifier P2 of electric capacity C5
Between end.Resistance R9 is serially connected between the negative pole of electric capacity C5 and the positive pole of amplifier P2.Electric capacity C6 is just
Pole is connected with the source electrode of FET MOS2, its minus earth.Resistance R10 is serially connected in electric capacity C6's
Between the negative pole of negative pole and amplifier P2.Resistance R11 is serially connected in output and the triode VT1 of amplifier P2
Base stage between.One end of resistance R12 is connected with the emitter stage of triode VT1, its other end then with electricity
Hold C3 negative pole be connected while ground connection.The P pole of diode D2 is connected with the colelctor electrode of triode VT1
Connect, its N pole is then as the output of this signal filter circuit.The negative pole of described electric capacity C5 also with process chip
The PHASE pin of U is connected；The GND pin ground connection of described process chip U.
As in figure 2 it is shown, this constant-current source circuit is by amplifier P3, amplifier P4, triode VT2, resistance
R13, resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, diode D3, inductance
L1, electric capacity C7, electric capacity C8, electric capacity C9 and electric capacity C10 form.
During connection, the negative pole of electric capacity C7 negative pole with amplifier P3 after resistance R14 is connected, its positive pole
Then as the input of this constant-current source circuit and it is connected with power supply.One end of resistance R13 is with amplifier P3's
Positive pole is connected, its other end ground connection.Resistance R15 is serially connected in the negative pole of amplifier P3 and amplifier P4's
Between output.One end of resistance R17 is connected with the output of amplifier P4, its other end is through inductance
After L1, the emitter stage with triode VT2 is connected.The positive pole of electric capacity C9 is connected with the negative pole of amplifier P4,
Its negative pole is connected with the base stage of triode VT2.The positive pole of electric capacity C8 is connected with the output of amplifier P4
Connect, its negative pole then positive pole with amplifier P4 is connected.The P pole of diode D3 after resistance R16 with put
The output of big device P3 is connected, its N pole colelctor electrode with triode VT2 after resistance R18 is connected.
The positive pole of electric capacity C10 is connected with the N pole of diode D3, its negative pole is as the output of this constant-current source circuit
End is also connected with the P pole of diode D1.
The interference signal being entrained in picture signal can be filtered by the present invention, improves picture signal
Quality, makes image become apparent from when display.Meanwhile, input current can be processed by the present invention, from
And guarantee that the present invention has constant operating current, it is to avoid it produces electromagnetic interference signal during work,
Greatly improve the stability of the present invention.Input current can be processed by the present invention, so that it is guaranteed that this
Invention has constant operating current, it is to avoid it produces electromagnetic interference signal during work, greatly
Improve the stability of the present invention.
As it has been described above, just can well realize the present invention.
Claims (5)
1. a high-definition image signal processing system based on constant-current source circuit, it is characterised in that mainly by
Reason chip U, FET MOS1, FET MOS2, respectively with the BOOT pipe processing chip U
The signal input amplifying circuit that pin is connected with VCC pin, the constant current being connected with signal input amplifying circuit
Source circuit, is serially connected in the electricity between the grid of FET MOS1 and the UGATE pin processing chip U
Resistance R5, is serially connected in the resistance between the grid of FET MOS2 and the LGATE pin processing chip U
R6, negative pole is connected with the drain electrode of FET MOS1, positive pole electric capacity C4 of ground connection after resistance R7,
The signal filter circuit being connected with FET MOS1, FET MOS2 and process chip U respectively,
And negative pole is connected with signal filter circuit, positive pole after resistance R4 with process chip U FB pin phase
The electric capacity C3 composition connected.
A kind of high-definition image signal processing system based on constant-current source circuit the most according to claim 1,
It is characterized in that, described constant-current source circuit is by amplifier P3, amplifier P4, and triode VT2, negative pole is through electricity
Be connected with the negative pole of amplifier P3 after resistance R14, positive pole is then as the electric capacity of input of this constant-current source circuit
C7, one end is connected with the positive pole of amplifier P3, the resistance R13 of other end ground connection, is serially connected in amplifier
Resistance R15 between negative pole and the output of amplifier P4 of P3, the output phase of one end and amplifier P4
Connect, resistance R17 that other end emitter stage with triode VT2 after inductance L1 is connected, positive pole with put
The electric capacity C9 that negative pole is connected, negative pole is connected with the base stage of triode VT2 of big device P4, positive pole with put
Electric capacity C8, the P pole warp that the output of big device P4 is connected, negative pole then positive pole with amplifier P4 is connected
After resistance R16 the output with amplifier P3 be connected, N pole after resistance R18 with triode VT2's
The diode D3 that colelctor electrode is connected, and positive pole is connected with the N pole of diode D3, negative pole is as this
The electric capacity C10 composition of the output of constant-current source circuit；The output of described constant-current source circuit is put with signal input
Big circuit is connected.
A kind of high-definition image signal processing system based on constant-current source circuit the most according to claim 2,
It is characterized in that, described signal input amplifying circuit by amplifier P1, the positive pole phase of positive pole and amplifier P1
Connect, electric capacity C1 that negative pole then output with amplifier P1 is connected, the negative pole of one end and amplifier P1
Be connected, the resistance R1 of other end ground connection, be serially connected in amplifier P1 output and process chip U VCC
Resistance R3, N pole between pin is connected with the BOOT pin processing chip U, P pole is electric with constant-current source
The diode D1 that the output on road is connected, and minus earth, positive pole after resistance R2 with diode D1
P pole be connected electric capacity C2 composition；The positive pole of described amplifier P1 is as this signal input amplifying circuit
Input, its output then negative pole with electric capacity C2 is connected.
A kind of high-definition image signal processing system based on constant-current source circuit the most according to claim 3,
It is characterized in that, described signal filter circuit is by amplifier P2, triode VT1, positive pole and FET
The electric capacity C5 that the source electrode of MOS1 is connected, negative pole then drain electrode with FET MOS2 is connected, concatenation
Resistance R8 between the positive pole and the output of amplifier P2 of electric capacity C5, is serially connected in the negative pole of electric capacity C5
And the resistance R9 between the positive pole of amplifier P2, positive pole is connected with the source electrode of FET MOS2, bears
The electric capacity C6 of pole ground connection, the resistance R10 being serially connected between the negative pole of electric capacity C6 and the negative pole of amplifier P2,
The resistance R11 being serially connected between the output of amplifier P2 and the base stage of triode VT1, one end and triode
The resistance R12 of ground connection while the emitter stage of VT1 is connected, the other end then negative pole with electric capacity C3 is connected,
And P pole is connected with the colelctor electrode of triode VT1, N pole is then as the output of this signal filter circuit
Diode D2 composition；The negative pole of described electric capacity C5 is also connected with the PHASE pin processing chip U；
The GND pin ground connection of described process chip U.
A kind of high-definition image signal processing system based on constant-current source circuit the most according to claim 4,
It is characterized in that, described process chip U is the integrated chip of APW7120.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610380673.3A CN105872316A (en) | 2016-05-31 | 2016-05-31 | High-definition image signal processing system based on constant-current source circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610380673.3A CN105872316A (en) | 2016-05-31 | 2016-05-31 | High-definition image signal processing system based on constant-current source circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105872316A true CN105872316A (en) | 2016-08-17 |
Family
ID=56675543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610380673.3A Pending CN105872316A (en) | 2016-05-31 | 2016-05-31 | High-definition image signal processing system based on constant-current source circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105872316A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106803867A (en) * | 2017-02-18 | 2017-06-06 | 沈阳工程学院 | A kind of constant current high-definition image signal processing system based on electromagnetism Dolby circuit |
-
2016
- 2016-05-31 CN CN201610380673.3A patent/CN105872316A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106803867A (en) * | 2017-02-18 | 2017-06-06 | 沈阳工程学院 | A kind of constant current high-definition image signal processing system based on electromagnetism Dolby circuit |
| CN106803867B (en) * | 2017-02-18 | 2019-09-20 | 沈阳工程学院 | A kind of constant current high-definition image signal processing system based on electromagnetism Dolby circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105848361A (en) | Dimming LED constant current driving system based on transistor oscillating circuit | |
| CN104967947A (en) | Low-pass filtering amplification audio processing system based on step-down constant current circuit | |
| CN104869729A (en) | Broad-pulse triggering lowpass filtering LED voltage stabilizing system based on phase processing | |
| CN104967413A (en) | Amplifier system for bias current source based on step-down constant current | |
| CN105847716A (en) | Signal amplification type high-definition image signal processing system based on current-constant source circuit | |
| CN105872316A (en) | High-definition image signal processing system based on constant-current source circuit | |
| CN105872412A (en) | Constant-current high-definition image signal processing system based on electromagnetic noise reducing circuit | |
| CN105872416A (en) | High-definition image signal processing system based on low-frequency amplifying circuit | |
| CN105872312A (en) | High-definition image signal processing system based on electromagnetic noise reducing circuit | |
| CN105872417A (en) | Signal amplification type high-definition image signal processing system based on electromagnetic noise reduction circuit | |
| CN106160494A (en) | A kind of feedback signal processing-type PWM inverse-excitation type switch power-supply | |
| CN106169878A (en) | A kind of face detection system power supply based on audion mu balanced circuit | |
| CN105872433A (en) | High-definition image signal processing system | |
| CN104469611A (en) | Audio processing system for widening range | |
| CN106028510A (en) | Power amplifier circuit-based LED constant current output drive system | |
| CN106100376A (en) | A kind of many processing of circuit type face detection system power supply | |
| CN105813277A (en) | LED constant-current output drive system based on transistor oscillating circuit | |
| CN105958810A (en) | Surge suppression circuit-based high-voltage and constant-current switching power supply | |
| CN104881649A (en) | Image display system based on triode common emitter symmetrical amplification circuit | |
| CN106100351A (en) | Peak restrained PWM inverse-excitation type switch power-supply based on feedback signal processing circuit | |
| CN105896995A (en) | High-voltage constant-current switching power supply | |
| CN105979651A (en) | Frequency compensation circuit-based current protection-type white LED step-up conversion system | |
| CN106059338A (en) | Multi-circuit processing-type aerator-used adjustable power supply | |
| CN106332368B (en) | A kind of LED flash band operation amplifier type energy-saving control circuit | |
| CN106059028A (en) | Battery rapid charging power supply based on pulse adjustment circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160817 |
|
| WD01 | Invention patent application deemed withdrawn after publication |