CN103310813A - DVD (Digital Video Disk) special servo motor audio processing decoding board - Google Patents
DVD (Digital Video Disk) special servo motor audio processing decoding board Download PDFInfo
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- CN103310813A CN103310813A CN2012100699197A CN201210069919A CN103310813A CN 103310813 A CN103310813 A CN 103310813A CN 2012100699197 A CN2012100699197 A CN 2012100699197A CN 201210069919 A CN201210069919 A CN 201210069919A CN 103310813 A CN103310813 A CN 103310813A
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Abstract
The invention relates to a DVD (Digital Video Disk) special servo motor audio processing decoding board, which comprises a DVD special servo motor audio processor, and an AC (Alternating Current)-DC (Direct-Current) power supply, an MCU (Micro Control Unit) and a memory which are respectively and electrically connected with the DVD special servo motor audio processor. The memory comprises a FLASH memory and an SDRAM (Synchronous Dynamic Random Access Memory). By integrally designing a motor driving function and an audio processing function in the DVD special servo motor audio processor to form a five-loop motor driver, a three-loop LDO (Low Dropout Regulator) power supply and a two-channel audio processing and MIC (Microphone) amplifier. The DVD special servo motor audio processing decoding board is simplified to four basic parts, i.e. the MCU, the FLASH memory, the SDRAM and the DVD special servo motor audio processor from the design structure of the entire machine, the communication control loops among circuits and the application periphery are simplified, and the primary flow rate and the reliability of the product are improved.
Description
Technical field
The present invention relates to the dedicated servo motor audio frequency and process decoding deck, more particularly, relate to a kind of DVD dedicated servo motor audio frequency and process decoding deck.
Background technology
DVD (Digital Video Disc, digital video disk) core component of decoding deck has MCU (Micro Control Unit, micro-control unit), FLASH (Flash EEPROM Memory, scratch pad memory), SDRAM (synchronous DRAM, Synchronous Dynamic Random Access Memory), servo motor driven, audio frequency amplification, power supply etc.Along with increasingly sharpening and the skill upgrading of integrated circuit (IC) design of competition, the motor drive circuit that comprises LDO (Low Dropout Regulator, low pressure difference linear voltage regulator) of existing DVD special use, and audio frequency amplifies special circuit.The MCU provider MCU processor of also having upgraded of specialty, partly incorporate servo motor driven in the processor, although such mode has reduced cost, because MCU and motor driver all belong to high power digital circuit, heat built-up easily causes the instability of machine product.
Summary of the invention
The technical problem to be solved in the present invention is, for the defects of prior art, provides a kind of DVD dedicated servo motor audio frequency to process decoding deck.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of DVD dedicated servo motor audio frequency and process decoding deck, it comprises DVD dedicated servo motor audio process, reaches the AC-DC power supply, MCU and the storer that are electrically connected with described DVD dedicated servo motor audio process respectively; Described storer comprises FLASH flash memory and SDRAM;
Described DVD dedicated servo motor audio process is surface-mounted integrated circuit and has 46 pins, and it comprises: the motor load module, five tunnel motor driving module, the 3.3V Voltage stabilizing module and the 1.8V Voltage stabilizing module that are used to external MCU and storer to power, be used to the main shaft of described five tunnel motor driving module, the 5V Voltage stabilizing module that focusing and tracking unit power, be used for carrying out the audio-frequency signal processing module of left and right acoustic channels filter and amplification and microphone audio amplification, for detection of 3.3V power supply and foundation and produce reset signal to the electrification reset module of MCU, shaven head driver module and SCART interface module; Wherein,
Between pin 6 and 28, connect the 14V stabilivolt and carry out clamp; Pin 11 and 12 and pin 13 and 14 between adopt gain to be the 12dB second-order low-pass filter; Between pin 7 and 8, adopt gain to be the low-pass first order filter of 30dB; Pin 9 is delayed, is the electric capacity of 0.1uF～1uF at these pin 9 external capacity, so that the turn-on muting time to be set; The pull-up resistor of pin 33 external 10K～22K is to the externally fed power supply, and connects over the ground the electric capacity of 0.1uF～1uF; Described bare headed driver module adopts Darlington transistor to drive CD and DVD laser tube, and input stage adopts low-pass filtering filtering high frequency clutter; Described SCART interface module is finished part SCART function by the NPN pipe of grounded emitter, and its maximum current is 10mA/CH; Described DVD dedicated servo motor audio process has 48 pins after encapsulation, wherein, pin one and 2 is empty pin; The pin 1 to 46 of the DVD dedicated servo motor audio process of pin 3 to 48 difference correspondences and un-encapsulated.
According to another aspect of the present invention, a kind of DVD dedicated servo motor audio process is provided, it is for surface-mounted integrated circuit and have 46 pins, and it comprises: the motor load module, five tunnel motor driving module, the 3.3V Voltage stabilizing module and the 1.8V Voltage stabilizing module that are used to external MCU and storer to power, be used to the main shaft of described five tunnel motor driving module, the 5V Voltage stabilizing module that focusing and tracking unit power, be used for carrying out the audio-frequency signal processing module of left and right acoustic channels filter and amplification and microphone audio amplification, for detection of 3.3V power supply and foundation and produce reset signal to the electrification reset module of MCU, shaven head driver module and SCART interface module; Wherein,
In DVD dedicated servo motor audio process of the present invention, between pin 6 and 28, connect the 14V stabilivolt and carry out clamp.
In DVD dedicated servo motor audio process of the present invention, pin 11 and 12 and pin 13 and 14 between adopt gain to be the 12dB second-order low-pass filter.
In DVD dedicated servo motor audio process of the present invention, between pin 7 and 8, adopt gain to be the low-pass first order filter of 30dB.
In DVD dedicated servo motor audio process of the present invention, pin 9 is delayed, is the electric capacity of 0.1uF～1uF at these pin 9 external capacity, so that the turn-on muting time to be set;
In DVD dedicated servo motor audio process of the present invention, the pull-up resistor of pin 33 external 10K～22K is to the externally fed power supply, and connects over the ground the electric capacity of 0.1uF～1uF.
In DVD dedicated servo motor audio process of the present invention, described bare headed driver module adopts Darlington transistor to drive CD and DVD laser tube, and input stage adopts low-pass filtering filtering high frequency clutter.
In DVD dedicated servo motor audio process of the present invention, described SCART interface module is finished part SCART function by the NPN pipe of grounded emitter, and its maximum current is 10mA/CH.
Implement DVD dedicated servo motor audio frequency of the present invention and process decoding deck, has following beneficial effect: by motor being driven and audio frequency processing Integrated design is DVD dedicated servo motor audio process, consist of and five road motor drivers, three road LDO power supplys, two channel audios are processed and the MIC amplifier, on the overall design structure, DVD dedicated servo motor audio frequency processing decoding deck is simplified MCU, FLASH, SDRAM and four basic elements of character of DVD dedicated servo motor audio process, simplify the Control on Communication loop between circuit and used peripherally, promoted flow rate and the reliability of product.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the system chart that DVD dedicated servo motor audio frequency of the present invention is processed decoding deck;
Fig. 2 is the circuit theory diagrams of DVD dedicated servo motor audio process shown in Figure 1;
Fig. 3 is the encapsulation figure of DVD dedicated servo motor audio process shown in Figure 2.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, process in the decoding deck at DVD dedicated servo motor audio frequency of the present invention, it mainly comprises DVD dedicated servo motor audio process 1, reaches the AC-DC power supply 6, MCU2 and the storer that are electrically connected with DVD dedicated servo motor audio process 1 respectively; When specific design, this storer comprises FLASH flash memory 3 and SDRAM4.In addition, also can comprise main shaft power regulator module 5, logically, civil power 7 also can be regarded the part that this DVD dedicated servo motor audio frequency is processed decoding deck as.This DVD dedicated servo motor audio process 1 cooperates MCU2, SDRAM4, FLASH3 jointly to consist of the core of this decoding deck.As shown in Figure 1, this DVD dedicated servo motor audio process is supplied with MCU2, FLASH3, SDRAM4, DVD/CD shaven head (not shown) by 6 power supplies of AC-DC power supply after voltage stabilizing is carried out in inside.Produce control signal to DVD dedicated servo motor audio process 1 by MCU2, drive the servo motor organisation operations by this DVD dedicated servo motor audio process 1.Shaven head reads the video disc signal and is decoded by MCU2, and vision signal is directly exported, and sound signal is undertaken exporting after audio frequency is processed by this DVD dedicated servo motor audio process 1 again.
When the AC-DC power supply adopts primary side feedback power supply, the fluctuation that output voltage can become owing to having lacked the feedback of voltage stabilizing and optocoupler is larger, can cause like this power consumption of DVD dedicated servo motor audio process to increase, it is unstable that system becomes, select this moment the PNP (PMOS) of large electric current as voltage stabilizing output, can make system become reliable and stable.Directly power supply gets final product if certain primary side feedback that adopts, this part can be ignored.The main bias supply of this product is AVCC, and VCC1 and VCC2 only carry the electric current of driver output pipe.Internal reference voltage is 1.18V, and the output voltage of 1.8V can be regulated by external divider resistance.
As shown in Figure 2, this DVD dedicated servo motor audio process 1 is for surface-mounted integrated circuit and have 46 pins, and it comprises: the motor load module, five tunnel motor driving module, the 3.3V Voltage stabilizing module and the 1.8V Voltage stabilizing module that are used to external MCU and storer to power, be used to the main shaft of described five tunnel motor driving module, the 5V Voltage stabilizing module that focusing and tracking unit power, be used for carrying out the audio-frequency signal processing module of left and right acoustic channels filter and amplification and microphone audio amplification, for detection of 3.3V power supply and foundation and produce reset signal to the electrification reset module of MCU, shaven head driver module and SCART interface module; Wherein, pin 1,2 is respectively SCART input and the SCART output of described SCART interface module; Pin 4,5 is respectively 1.8V voltage stabilizing adjusting and the benchmark output of described 1.8V Voltage stabilizing module; Pin 6,7,8,9,10,11,12,13,14,28 and 29 is respectively audio frequency VCC, microphone input, microphone output, audio frequency soft start, audio mute, R channel input, L channel input, L channel output, R channel output, audio frequency VSS and the audio frequency ground connection of described audio-frequency signal processing module; Pin 15,16,17,18,19,20,21 and 22 is respectively the signal that delivers from godown, warehouse entry signal, feeding signal, focus signal, motor noise elimination, reference voltage input, tracking signal and the main shaft signal of described motor load module; Pin 23 is described 3.3V Voltage stabilizing module+3.3V voltage stabilizing output; Pin 24,25,26 and 27 is respectively DVD shaven head signal, the output of DVD shaven head, the output of CD shaven head and the CD shaven head signal of described bare headed driver module; Pin 3,30 and 31 be respectively described 5V Voltage stabilizing module+5V power supply 1 ,+the 5V voltage-regulation and+5V power supply 2; Pin 32 is 3.3V Voltage stabilizing module+3.3V voltage-regulation; Pin 33 is the reset signal output of described electrification reset module; Pin 34,35,36,37,38,39,40,41,42,43,44,45 and 46 be respectively the main shaft ground, main shaft of described motor driving module-, main shaft+, tracking-, tracking+, focusing and tracking Power Groud, focusing+, focus on-, feeding-, feeding+, loading and feed power ground, pallet+and pallet-; Between pin 6 and 28, connect the 14V stabilivolt and carry out clamp, can not damage with the protection stabilivolt in power supply input series limiting resistor in addition; Pin 11 and 12 and pin 13 and 14 between adopt gain to be the 12dB second-order low-pass filter; Adopt gain to be the low-pass first order filter of 30dB between pin 7 and 8, mute function only works the quiet high level work of low level to left and right acoustic channels; Pin 9 is delayed, is the electric capacity of 0.1uF～1uF at these pin 9 external capacity, so that the turn-on muting time to be set.In order to reduce output terminal and audio frequency apparatus input end owing to the impact failure that does not cause altogether, in left and right acoustic channels output terminal series limiting resistor; The pull-up resistor of pin 33 external 10K～22K is to the externally fed power supply, and connects over the ground the electric capacity of 0.1uF～1uF, and detecting the action high level that powers on is 2.9V, and the power down low level is 2.75V; Described bare headed driver module adopts Darlington transistor to drive CD and DVD laser tube, and input stage adopts low-pass filtering filtering high frequency clutter; Described SCART interface module is finished part SCART function by the NPN pipe of grounded emitter, and its maximum current is 10mA/CH, and power supply is inner 3.3V stabilized voltage supply, and adjusts output current according to the bare headed model output resistance of connecting.
This DVD dedicated servo motor audio process has 48 pins after encapsulation, wherein, pin one and 2 is empty pin; The pin 1 to 46 of the DVD dedicated servo motor audio process of pin 3 to 48 difference correspondences and un-encapsulated.Among the embodiment as shown in Figure 3, adopt the packing forms of eLQFP48L.Definition such as following table 1 48 pins of DVD dedicated servo motor audio process after for encapsulation:
Table 1
This DVD dedicated servo motor audio process 1 solves the motor driving to the interference of audio frequency by domain wiring and isolation design; Integrated circuit (IC) design adopts longitudinal P pipe (VPNP) to reduce dissipated power; Adopting the eLQFP48L encapsulation to solve chip power dissipates; Solve audio interface reactance voltage shock problem on the basis that guarantees audio-frequency index.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a DVD dedicated servo motor audio frequency is processed decoding deck, it is characterized in that, comprises DVD dedicated servo motor audio process, reaches the AC-DC power supply, MCU and the storer that are electrically connected with described DVD dedicated servo motor audio process respectively; Described storer comprises FLASH flash memory and SDRAM;
Described DVD dedicated servo motor audio process is surface-mounted integrated circuit and has 46 pins, and it comprises: the motor load module, five tunnel motor driving module, the 3.3V Voltage stabilizing module and the 1.8V Voltage stabilizing module that are used to external MCU and storer to power, be used to the main shaft of described five tunnel motor driving module, the 5V Voltage stabilizing module that focusing and tracking unit power, be used for carrying out the audio-frequency signal processing module of left and right acoustic channels filter and amplification and microphone audio amplification, for detection of 3.3V power supply and foundation and produce reset signal to the electrification reset module of MCU, shaven head driver module and SCART interface module; Wherein,
Pin 1,2 is respectively SCART input and the SCART output of described SCART interface module; Pin 4,5 is respectively 1.8V voltage stabilizing adjusting and the benchmark output of described 1.8V Voltage stabilizing module; Pin 6,7,8,9,10,11,12,13,14,28 and 29 is respectively audio frequency VCC, microphone input, microphone output, audio frequency soft start, audio mute, R channel input, L channel input, L channel output, R channel output, audio frequency VSS and the audio frequency ground connection of described audio-frequency signal processing module; Pin 15,16,17,18,19,20,21 and 22 is respectively the signal that delivers from godown, warehouse entry signal, feeding signal, focus signal, motor noise elimination, reference voltage input, tracking signal and the main shaft signal of described motor load module; Pin 23 is described 3.3V Voltage stabilizing module+3.3V voltage stabilizing output; Pin 24,25,26 and 27 is respectively DVD shaven head signal, the output of DVD shaven head, the output of CD shaven head and the CD shaven head signal of described bare headed driver module; Pin 3,30 and 31 be respectively described 5V Voltage stabilizing module+5V power supply 1 ,+the 5V voltage-regulation and+5V power supply 2; Pin 32 is 3.3V Voltage stabilizing module+3.3V voltage-regulation; Pin 33 is the reset signal output of described electrification reset module; Pin 34,35,36,37,38,39,40,41,42,43,44,45 and 46 be respectively the main shaft ground, main shaft of described motor driving module-, main shaft+, tracking-, tracking+, focusing and tracking Power Groud, focusing+, focus on-, feeding-, feeding+, loading and feed power ground, pallet+and pallet-;
Between pin 6 and 28, connect the 14V stabilivolt and carry out clamp; Pin 11 and 12 and pin 13 and 14 between adopt gain to be the 12dB second-order low-pass filter; Between pin 7 and 8, adopt gain to be the low-pass first order filter of 30dB; Pin 9 is delayed, is the electric capacity of 0.1uF～1uF at these pin 9 external capacity, so that the turn-on muting time to be set; The pull-up resistor of pin 33 external 10K～22K is to the externally fed power supply, and connects over the ground the electric capacity of 0.1uF～1uF; Described bare headed driver module adopts Darlington transistor to drive CD and DVD laser tube, and input stage adopts low-pass filtering filtering high frequency clutter; Described SCART interface module is finished part SCART function by the NPN pipe of grounded emitter, and its maximum current is 10mA/CH; Described DVD dedicated servo motor audio process has 48 pins after encapsulation, wherein, pin one and 2 is empty pin; The pin 1 to 46 of the DVD dedicated servo motor audio process of pin 3 to 48 difference correspondences and un-encapsulated.
2. DVD dedicated servo motor audio process, it is characterized in that, described DVD dedicated servo motor audio process is surface-mounted integrated circuit and has 46 pins, and it comprises: the motor load module, five tunnel motor driving module, the 3.3V Voltage stabilizing module and the 1.8V Voltage stabilizing module that are used to external MCU and storer to power, be used to the main shaft of described five tunnel motor driving module, the 5V Voltage stabilizing module that focusing and tracking unit power, be used for carrying out the audio-frequency signal processing module of left and right acoustic channels filter and amplification and microphone audio amplification, for detection of 3.3V power supply and foundation and produce reset signal to the electrification reset module of MCU, shaven head driver module and SCART interface module; Wherein,
Pin 1,2 is respectively SCART input and the SCART output of described SCART interface module; Pin 4,5 is respectively 1.8V voltage stabilizing adjusting and the benchmark output of described 1.8V Voltage stabilizing module; Pin 6,7,8,9,10,11,12,13,14,28 and 29 is respectively audio frequency VCC, microphone input, microphone output, audio frequency soft start, audio mute, R channel input, L channel input, L channel output, R channel output, audio frequency VSS and the audio frequency ground connection of described audio-frequency signal processing module; Pin 15,16,17,18,19,20,21 and 22 is respectively the signal that delivers from godown, warehouse entry signal, feeding signal, focus signal, motor noise elimination, reference voltage input, tracking signal and the main shaft signal of described motor load module; Pin 23 is described 3.3V Voltage stabilizing module+3.3V voltage stabilizing output; Pin 24,25,26 and 27 is respectively DVD shaven head signal, the output of DVD shaven head, the output of CD shaven head and the CD shaven head signal of described bare headed driver module; Pin 3,30 and 31 be respectively described 5V Voltage stabilizing module+5V power supply 1 ,+the 5V voltage-regulation and+5V power supply 2; Pin 32 is 3.3V Voltage stabilizing module+3.3V voltage-regulation; Pin 33 is the reset signal output of described electrification reset module; Pin 34,35,36,37,38,39,40,41,42,43,44,45 and 46 be respectively the main shaft ground, main shaft of described motor driving module-, main shaft+, tracking-, tracking+, focusing and tracking Power Groud, focusing+, focus on-, feeding-, feeding+, loading and feed power ground, pallet+and pallet-.
3. DVD dedicated servo motor audio process according to claim 2 is characterized in that, connects the 14V stabilivolt and carry out clamp between pin 6 and 28.
4. DVD dedicated servo motor audio process according to claim 2 is characterized in that, pin 11 and 12 and pin 13 and 14 between adopt gain to be the 12dB second-order low-pass filter.
5. DVD dedicated servo motor audio process according to claim 2 is characterized in that, adopts gain to be the low-pass first order filter of 30dB between pin 7 and 8.
6. DVD dedicated servo motor audio process according to claim 2 is characterized in that, pin 9 is delayed, is the electric capacity of 0.1uF～1uF at these pin 9 external capacity, so that the turn-on muting time to be set.
7. DVD dedicated servo motor audio process according to claim 2 is characterized in that, the pull-up resistor of pin 33 external 10K～22K is to the externally fed power supply, and connects over the ground the electric capacity of 0.1uF～1uF.
8. DVD dedicated servo motor audio process according to claim 2 is characterized in that, described bare headed driver module adopts Darlington transistor to drive CD and DVD laser tube, and input stage adopts low-pass filtering filtering high frequency clutter.
9. DVD dedicated servo motor audio process according to claim 2 is characterized in that, described SCART interface module is finished part SCART function by the NPN pipe of grounded emitter, and its maximum current is 10mA/CH.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104835515A (en) * | 2015-04-27 | 2015-08-12 | 无锡焺通微电子有限公司 | Five-channel motor driving circuit |
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| JP2003173215A (en) * | 2001-09-26 | 2003-06-20 | Sony Corp | Information processor, program loading method, recording medium, program updating method and circuit element |
| EP1367581A2 (en) * | 2002-05-31 | 2003-12-03 | Sony Corporation | Information recording/reading apparatus and method |
| CN102157185A (en) * | 2011-04-20 | 2011-08-17 | 新科电子集团有限公司 | All-in-one machine of blue ray player and cable digital television |
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- 2012-03-16 CN CN201210069919.7A patent/CN103310813B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003173215A (en) * | 2001-09-26 | 2003-06-20 | Sony Corp | Information processor, program loading method, recording medium, program updating method and circuit element |
| EP1367581A2 (en) * | 2002-05-31 | 2003-12-03 | Sony Corporation | Information recording/reading apparatus and method |
| CN102157185A (en) * | 2011-04-20 | 2011-08-17 | 新科电子集团有限公司 | All-in-one machine of blue ray player and cable digital television |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104835515A (en) * | 2015-04-27 | 2015-08-12 | 无锡焺通微电子有限公司 | Five-channel motor driving circuit |
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