CN2626154Y - Digital MP3 player - Google Patents
Digital MP3 player Download PDFInfo
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- CN2626154Y CN2626154Y CN 03226678 CN03226678U CN2626154Y CN 2626154 Y CN2626154 Y CN 2626154Y CN 03226678 CN03226678 CN 03226678 CN 03226678 U CN03226678 U CN 03226678U CN 2626154 Y CN2626154 Y CN 2626154Y
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Abstract
The utility model provides a digital MP3 displayer, which comprises a casing and a circuit board arranged in the casing. The circuit board includes: a USB interface (71) which connects a central processor unit (10) by a communication circuit (72), a microphone (61) which connects with the central processor unit (10) by a recording circuit (62), a headphone interface (51) which connects with the central processor unit (10) by a voice amplification circuit (52), the utility model further comprises a liquid crystal display (30), a key button (80), a memory (20), and a crystal oscillating circuit 1 (11) and a crystal oscillating circuit 2 (12) which are directly connected with the central processor unit (10), a voltage reducing circuit (41) which connects with the USB interface (71) and provides the working voltage of the digital MP3 displayer, and a voltage increasing circuit (42) which connects with a battery (43) and provides the working voltage of the digital MP3 displayer. The digital MP3 displayer has the size equivalent to that of a mobile U disk, and very simple and convenient operation.
Description
Technical field
The utility model relates to the MP3 player, particularly a kind of digital MP3 player.
Background technology
The digital MP3 player that prior art relates to, generally need to adopt special on-line software could and computer carry out exchanges data, operate more loaded down with trivial detailsly, the volume of player own is bigger.
Summary of the invention
The technical problem that will solve of the present utility model is to overcome the deficiencies in the prior art, and proposes a kind of easy to operate possess flash electronic type peripheral storage device (abbreviation USB flash disk) function and the volume digital MP3 player suitable with USB flash disk.
The technical scheme in the invention for solving the above technical problem is, manufactures and designs a kind of digital MP3 player, comprises the circuit board in casing and the casing, and described circuit board comprises: USB interface, and it is connected with central processing unit by telecommunication circuit; Microphone, it is connected with central processing unit by recording circuit; Earphone interface, it is connected with central processing unit by the sound amplifying circuit; Also have LCD in addition, button, memory, crystal oscillating circuit 1 directly is connected with central processing unit with crystal oscillating circuit 2; Reduction voltage circuit, it is connected with USB interface, for this digital MP3 player provides operating voltage; Booster circuit, it is connected with battery, for this digital MP3 player provides operating voltage.
Compare with prior art, digital MP3 player of the present utility model can accomplish that volume is little of suitable with mobile USB flash disk, and operation is very easy.
Description of drawings
Fig. 1 is the schematic block circuit diagram of the digital MP3 player of the utility model.
Fig. 2 is the central processing unit partial circuit principle schematic of the digital MP3 player of the utility model.
Fig. 3 is the memory portion circuit theory schematic diagram of the digital MP3 player of the utility model.
Fig. 4 is the LCD partial circuit principle schematic of the digital MP3 player of the utility model.
Fig. 5 is the reduction voltage circuit partial circuit principle schematic of the digital MP3 player of the utility model.
Fig. 6 is the booster circuit partial circuit principle schematic of the digital MP3 player of the utility model.
Fig. 7 is the operating voltage testing circuit partial circuit principle schematic of the digital MP3 player of the utility model.
Fig. 8 is the sound amplification circuits circuit theory schematic diagram of the digital MP3 player of the utility model.
Fig. 9 is the recording circuit partial circuit principle schematic of the digital MP3 player of the utility model.
Figure 10 is the telecommunication circuit partial circuit principle schematic of the digital MP3 player of the utility model.
Figure 11 is the button partial circuit principle schematic of the digital MP3 player of the utility model.
Embodiment
Be described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing.
A kind of digital MP3 player comprises casing, is installed in circuit board and battery in the casing, and is positioned at LCD 30 and button 80 that the casing surface is connected with described circuit board.As shown in Figure 1, described circuit board comprises: USB interface 71, and it is connected with central processing unit 10 by telecommunication circuit 72; Microphone 61, it is connected with central processing unit 10 by recording circuit 62; Earphone interface 51, it is connected with central processing unit 10 by sound amplifying circuit 52; Also have memory 20 in addition, crystal oscillating circuit 1 11 directly is connected with central processing unit 10 with crystal oscillating circuit 2 12; LCD 30 also directly is connected with central processing unit 10 with button 80; Reduction voltage circuit 41, it is connected with USB interface 71, can utilize external power source to provide operating voltage for this digital MP3 player; Booster circuit 42, it is connected with battery 43, can utilize battery 43 to provide operating voltage for this digital MP3 player.
As shown in Figure 2, central processing unit 10 is made of chip U1 and peripheral circuit thereof, the ATJ-2073 model that U1 adopts Zhuhai torch power company to produce, and the function of it is integrated common microprocessor and data signal processor is in one.Crystal oscillating circuit 1 11 adopts crystal X1, and the resonance frequency of X1 is 32.768KHz, cooperates the U1 internal circuit that the timing reference pulse of this digital MP3 player is provided; Crystal oscillating circuit 2 12 adopts crystal X2, and the resonance frequency of X2 is 24.576MHz, cooperates the U1 internal circuit that the working standard pulse of U1 chip is provided.
As shown in Figure 3, memory 20 comprises program storage portion 21 and storage part 22, and program storage portion 21 is made of chip U2, and U2 is flash body (FLASH), the 39VF010 model that adopts American SS T company to produce; Storage part 22 is made of chip U3, and U3 is FLASH, the K9F5698UOM model that adopts Korea S Samsung to produce.
As shown in Figure 4, LCD 30 comprises LCD MODULE U9, and U9 adopts the Shanwei to believe the TSC6194-DFFD model that sharp semiconductor company produces.
As shown in Figure 5, reduction voltage circuit 41 from power supply signal USB on the USB interface 71, is isolated through series diode D003, connects the input pin 2 of lowering and stabilizing blood pressure chip U04, can provide this digital MP3 player operating voltage VDD from its output pin 3 after the voltage stabilizing; From power supply signal USB on the USB interface 71, isolate through series diode D004, connect the input pin 2 of lowering and stabilizing blood pressure chip U05, can provide this digital MP3 player operating voltage VCC from its output pin 3 after the voltage stabilizing.
As shown in Figure 6, booster circuit 42, the positive pole of battery 43 is behind the switch that series connection is composed in parallel by metal-oxide-semiconductor Q1 and transistor Q2, series inductance L002, the Schottky diode D002 that connects again provides operating voltage VDD, and the magnitude of voltage of VDD is 2.35V, the anode of D002 is connected to the collector electrode of NPN transistor Q002, the grounded emitter of Q002, the base stage of Q002 is connected to the DCOP1 pin of U1, described resistance R 011 capacitor C 004 in parallel through series resistance R011; Equally, the positive pole of battery 43, behind the switch that series connection is composed in parallel by metal-oxide-semiconductor Q1 and transistor Q2, series inductance L001, Schottky diode D001 again connects, operating voltage VCC can be provided, the magnitude of voltage of VCC is 3.15V, and the anode of D001 is also connected to the collector electrode of NPN transistor Q001, the grounded emitter of Q001, the base stage of Q001 is connected to the DCOP2 pin of U1, described resistance R 010 capacitor C 003 in parallel through series resistance R010.
As shown in Figure 7, working power voltage testing circuit 44, VCC produces the burning voltage benchmark VREFI of 1.5V through low pressure drop voltage stabilizing chip U03, this voltage reference, and the voltage detection signal VL0 that produces through the bleeder circuit that series resistance R003～R006 forms, VL1, VL2 go up respective pin with U1 and are connected.
As shown in Figure 8, sound amplifying circuit 52, the AOUTL pin of U1 is through series capacitance C117, again series resistance R113, series resistance R115 again, series capacitance C119 again, connect the L channel output of earphone socket 51, the intersection point of resistance R 113 and resistance R 115 is connected the PAIL pin of U1, and the intersection point of resistance R 115 and capacitor C 119 is connected the PAOL pin of U1, the L channel output of earphone socket 51 is also through series resistance R117, again series capacitance C121 ground connection; The AOUTR of U1 is through series capacitance C116, series resistance R112 again, series resistance R114 again, series capacitance C118 again, connect the R channel output of earphone socket 51, the intersection point of resistance R 112 and resistance R 114 is connected the PAIR pin of U1, and the intersection point of resistance R 114 and capacitor C 118 is connected the PAOR pin of U1, the R channel output of earphone socket 51 is also through series resistance R116, again series capacitance C120 ground connection.
As shown in Figure 9, recording circuit 62, signal from microphone 61, through series capacitance C128, series resistance R120, series resistance R118 more again, be connected to the MICOUT pin of U1, circuit behind resistance R 118 and the resistance R 119 series capacitance C126 is in parallel, and resistance R 119 and the intersection point of capacitor C 126 are connected to the MICIN pin of U1, is connected a capacitor C 125 between the AGCI pin of U1 and MICOUT pin; From the signal of microphone 51 also through series resistance R121, series capacitance C131 ground connection again, and the intersection point of resistance R 121 and capacitor C 131 is connected the VMIC pin of U1.
As shown in figure 10, telecommunication circuit 72, the USBD-pin of U1 connects the D-end of USB socket 71 through series resistance R103; The USBD+ pin of U1 is held through the D+ that series resistance R104 connects USB socket 71, and the USBD+ pin of U1 also connects the LO pin of U1 through series resistance R123; The USBV pin of U1 is held through the VBUS that series resistance R105 connects USB socket 71, and the USBV pin of U1 is also through series resistance R106 ground connection.
As shown in figure 11, button 80 comprises button SW1, and this key is realized the selection operation of this digital MP3 mode of operation; Button SW2, this key realize the rewind function operation; Button SW3, this key realize the advancement function operation; Button SW4, this key realize the repeat function operation; Button SW5, this key realize the operation function operation.The end of button SW1 connects the negative electrode of diode D2, the anode of D2 connects operating voltage VCC, this end also connects the negative electrode of diode D1 simultaneously, the anode of D1 connects the positive pole of battery 43, the other end of button SW1 connects the OD2 pin of U1, the base stage that connects NPN transistor Q3 through series resistance R2, the grounded emitter of Q3, the collector electrode of Q3 is through the base stage of series resistance R3 connection PNP transistor Q2, and the emitter of Q2 connects the positive pole of battery 43, and the collector electrode of Q2 connects booster circuit 42, the resistance R 1 of connecting between the base stage of Q2 and the emitter, the emitter of Q2 is connected with the drain electrode of metal-oxide-semiconductor Q1, and the collector electrode of Q2 is connected with the source electrode of Q1, and the grid of Q1 connects the OD3 pin of U1.
Claims (10)
1. a digital MP3 player comprises casing and the circuit board that is positioned at casing, it is characterized in that:
Described circuit board comprises: USB interface (71), and it is connected with central processing unit (10) by telecommunication circuit (72); Microphone (61), it is connected with central processing unit (10) by recording circuit (62); Earphone interface (51), it is connected with central processing unit (10) by sound amplifying circuit (52); Also have LCD (30) in addition, button (80), memory (20), crystal oscillating circuit 1 (11) directly is connected with central processing unit (10) with crystal oscillating circuit 2 (12); Reduction voltage circuit (41), it is connected with USB interface (71), for this digital MP3 player provides operating voltage; Booster circuit (42), it is connected with battery (43), for this digital MP3 player provides operating voltage.
2. digital MP3 player as claimed in claim 1 is characterized in that: it is the crystal X1 of 32.768KHz that described crystal oscillating circuit 1 (11) adopts resonance frequency, and X1 cooperates U1 chip internal circuit, and the timing reference pulse of this digital MP3 player is provided; It is the crystal X2 of 24.576MHz that crystal circuit 2 (12) adopts resonance frequency, and X2 cooperates the U1 internal circuit, and the working standard pulse of U1 chip is provided.
3. digital MP3 player as claimed in claim 1 is characterized in that: described memory (20) comprises program storage portion (21) and storage part (22); Program storage portion (21) is made of chip U2, and U2 is flash (FLASH) chip; Storage part (22) is made of chip U3, and U3 is the FLASH chip.
4. digital MP3 player as claimed in claim 1 is characterized in that: described reduction voltage circuit (41) is:
After series diode D003 isolates, connect the input pin 2 of lowering and stabilizing blood pressure chip U04 from the power supply signal USB of USB interface (71), the 1 pin ground connection of U04, the output pin 3 of U04 provides operating voltage VDD; After series diode D004 isolates, connect the input pin 2 of lowering and stabilizing blood pressure chip U05 from the power supply signal USB of USB interface (71), the 1 pin ground connection of U05, the output pin 3 of U05 provides operating voltage VCC.
5. digital MP3 player as claimed in claim 1 is characterized in that: described booster circuit (42) is:
The positive pole of battery (43) is behind the switch that series connection is composed in parallel by metal-oxide-semiconductor Q1 and PNP transistor Q2, behind the series inductance L002, again after series connection Schottky diode D002 isolates, output services voltage VDD, the anode of D002 is connected to the collector electrode of NPN transistor Q002, the grounded emitter of Q002, the base stage of Q002 is connected to the DCOP1 pin of U1, described resistance R 011 capacitor C 004 in parallel through series resistance R011; Equally, the positive pole of battery (43) is behind the switch that series connection is composed in parallel by metal-oxide-semiconductor Q1 and PNP transistor Q2, behind the series inductance L001, again after series connection Schottky diode D001 isolates, output services voltage VCC, the anode of D001 is connected to the collector electrode of NPN transistor Q001, the grounded emitter of Q001, the base stage of Q001 is connected to the DCOP2 pin of U1, described resistance R 010 shunt capacitance C003 through series resistance R010.
6. digital MP3 player as claimed in claim 1 is characterized in that: described button (80) comprising:
Button SW1, this key is realized the selection operation of this digital MP3 mode of operation; Button SW2, this key realize the rewind function operation; Button SW3, this key realize the advancement function operation; Button SW4, this key realize the repeat function operation; Button SW5, this key realize the operation function operation; The end of button SW1 connects the negative electrode of diode D2, the anode of D2 connects operating voltage VCC, this end also connects the negative electrode of diode D1 simultaneously, the anode of D1 connects the positive pole of battery (43), the other end of button SW1 connects the OD2 pin of U1, the base stage that connects NPN transistor Q3 through series resistance R2, the grounded emitter of Q3, the collector electrode of Q3 connects the base stage of PNP transistor Q2 through series resistance R3, the emitter of Q2 connects the positive pole of battery (43), the collector electrode of Q2 connects booster circuit (42), the resistance R 1 of connecting between the base stage of Q2 and the emitter, the emitter of Q2 is connected with the drain electrode of metal-oxide-semiconductor Q1, and the collector electrode of Q2 is connected with the source electrode of Q1, and the grid of Q1 connects the OD3 pin of U1.
7. digital MP3 player as claimed in claim 1 is characterized in that: described recording circuit (62) is:
Signal from microphone (61), through series capacitance C128, series resistance R120 again, be connected to the MICOUT pin of U1 again behind the series resistance R118, circuit behind resistance R 118 and the resistance R 119 series capacitance C126 is in parallel, and the intersection point of resistance R 119 and capacitor C 126 is connected to the MICIN pin of U1, series capacitance C125 between the AGCI pin of U1 and MICOUT pin; From the signal of microphone 61, also through series resistance R121, series capacitance C131 ground connection again, the intersection point of resistance R 121 and capacitor C 131 is connected the VMIC pin of U1.
8. digital MP3 player as claimed in claim 1 is characterized in that: described sound amplifying circuit (52) is:
The AOUTL pin of U1 is behind series capacitance C117, series resistance R113 again, series resistance R115 again, be connected to the L channel output of earphone socket (51) again behind the series capacitance C119, the intersection point of resistance R 113 and resistance R 115 is connected the PAIL pin of U1, the intersection point of resistance R 115 and capacitor C 119 is connected the PAOL pin of U1, and the L channel output of earphone socket (51) is also through series resistance R117, again series capacitance C121 ground connection; The AOUTR pin of U1 is behind series capacitance C116, series resistance R112 again, series resistance R114 again, be connected to the R channel output of earphone socket (51) again behind the series capacitance C118, the intersection point of resistance R 112 and resistance R 114 is connected the PAIR pin of U1, the intersection point of resistance R 114 and capacitor C 118 is connected the PAOR pin of U1, and the R channel output of earphone socket (51) is also through series resistance R116, again series capacitance C120 ground connection.
9. digital MP3 player as claimed in claim 1 is characterized in that: described telecommunication circuit (72) is:
The USBD-pin of U1 connects the D-end of USB socket (71) through series resistance R103; The USBD+ pin of U1 is held through the D+ that series resistance R104 connects USB socket (71), and the USBD+ pin of U1 also connects the LO pin of U1 through series resistance R123; The USBV pin of U1 is held through the VBUS that series resistance R105 connects USB socket (71), and the USBV pin of U1 is also through series resistance R106 ground connection.
10. digital MP3 player as claimed in claim 1, it is characterized in that: described working power voltage testing circuit (44) is: VCC produces the burning voltage benchmark VREFI of 1.5V through low pressure drop voltage stabilizing chip U03, this voltage reference, and the voltage detection signal VL0 that produces through the bleeder circuit that series resistance R003～R006 forms, VL1, VL2 go up respective pin with U1 and are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03226678 CN2626154Y (en) | 2003-05-27 | 2003-05-27 | Digital MP3 player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03226678 CN2626154Y (en) | 2003-05-27 | 2003-05-27 | Digital MP3 player |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2626154Y true CN2626154Y (en) | 2004-07-14 |
Family
ID=34246710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03226678 Expired - Fee Related CN2626154Y (en) | 2003-05-27 | 2003-05-27 | Digital MP3 player |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2626154Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009092296A1 (en) * | 2008-01-21 | 2009-07-30 | Xu, Hang | Visible terminal and method for playing media information |
| CN100585723C (en) * | 2006-11-24 | 2010-01-27 | 徐玉梅 | Safe U disk memorizer |
| CN101326574B (en) * | 2005-10-07 | 2011-06-15 | 创新科技有限公司 | A portable digital media device with a force sensor |
| CN103854692A (en) * | 2014-02-28 | 2014-06-11 | 刘骏涛 | MP3 (MPEG1 layer 3) player |
-
2003
- 2003-05-27 CN CN 03226678 patent/CN2626154Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101326574B (en) * | 2005-10-07 | 2011-06-15 | 创新科技有限公司 | A portable digital media device with a force sensor |
| CN100585723C (en) * | 2006-11-24 | 2010-01-27 | 徐玉梅 | Safe U disk memorizer |
| WO2009092296A1 (en) * | 2008-01-21 | 2009-07-30 | Xu, Hang | Visible terminal and method for playing media information |
| CN103854692A (en) * | 2014-02-28 | 2014-06-11 | 刘骏涛 | MP3 (MPEG1 layer 3) player |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |