CN2901379Y - Processing box chip - Google Patents
Processing box chip Download PDFInfo
- Publication number
- CN2901379Y CN2901379Y CN 200620058739 CN200620058739U CN2901379Y CN 2901379 Y CN2901379 Y CN 2901379Y CN 200620058739 CN200620058739 CN 200620058739 CN 200620058739 U CN200620058739 U CN 200620058739U CN 2901379 Y CN2901379 Y CN 2901379Y
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- China
- Prior art keywords
- resistance
- triode
- electric contact
- current
- mcu
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Abstract
The utility model relates to a process-box chip for laser printer, comprising electric contacts a and b contacted separately with the power supply of the printer and the ground, a current-limiting resistance R1 connected with the electric contact a, a demodulation circuit connected with the electric contact a, a MCU connected to the output port of demodulation circuit and a modulation circuit connected with the output port of MCU and electric contact a, wherein the modulation circuit comprises a resistance R2, a resistance R3, a transistor Q1 and a transistor Q2. When the process-box chip is executing read operation, with the transistor Q1 in modulation circuit conducting, the current-limiting resistance R1 and resistance R2 form a parallel circuit, which is serially connected with the MCU, while the current transmitted by the electric contact a will be supplied to the MCU for maximal voltage.
Description
Technical field
The utility model relates to a kind of laser printer processing box chip.。
Background technology
At present, the chip that can carry out signal transmission and information storage function with laser printer mostly is installed on the laser printer processing box.Fig. 1 has disclosed a kind of inner structure of existing process box chip, the current-limiting resistance R1 that it comprises the electric contact a that contact respectively with the power supply of printer chip and ground and b, link to each other with electric contact a, be connected on capacitor C 1 between current-limiting resistance R1 and the ground, with electric contact a continuous demodulator circuit 2, the MCU (microcontroller) 3 that is connected the output terminal of demodulator circuit 2, the IO (input/output end port) 3 that is connected MCU3 and the modulation circuit 4 between the electric contact a.Modulation circuit 4 comprises triode Q1 and resistance R 2, and resistance R 2 is connected between the collector and current-limiting resistance R1 of triode Q1.When existing process box chip 1 is carried out read operation, electric contact a sends power supply to current-limiting resistance R1, capacitor C 1, demodulator circuit 2, the pin IO2 of MCU3 and modulation circuit 4, simultaneously, send the signal that carries in the power supply to demodulator circuit 2, afterwards, demodulator circuit 2 comes out to send to the pin IO1 of MCU3 with the signal demodulation, after receiving this signal, the pin IO3 of MCU3 is by the control output high level of internal processes, thereby make the triode Q1 conducting of modulation circuit 4, modulation circuit 4 is modulated the back sends to printer by electric contact a and b chip with signal.
At present, because the program that MCU3 is written into becomes increasingly complex, therefore, the operating voltage of MCU3 also needs to improve.Yet, when process box chip 1 when carrying out read operation, after the triode Q1 of modulation circuit 4 conducting, the circuit that current-limiting resistance R1 is connected in series with MCU3 is with resistance R 2 parallel connections, the electric current that electric contact a transmits is consumed a part by resistance R 2, makes MCU3 fail to obtain maximum voltage.
Therefore, provide a kind of process box chip that can make MCU obtain maximum voltage the real necessity that belongs to.
Summary of the invention
The purpose of this utility model provides a kind of process box chip that can make MCU obtain maximum voltage.
For achieving the above object, the process box chip that the utility model relates to comprises electric contact a and the b that contacts respectively with the power supply of printer chip and ground, with the continuous current-limiting resistance R1 of electric contact a, be connected on the capacitor C 1 between current-limiting resistance R1 and the ground, with the continuous demodulator circuit of electric contact a, be connected the MCU of the output terminal of demodulator circuit, be connected the output terminal of MCU and the modulation circuit between the electric contact a, modulation circuit comprises resistance R 2, resistance R 3, triode Q1 and triode Q2, resistance R 2 is connected between the collector of the end of current-limiting resistance R1 and triode Q2, the emitter of triode Q2 links to each other with electric contact a, resistance R 3 is connected between the base stage of the collector of triode Q1 and triode Q2, and the base stage of triode Q1 connects the output terminal of MCU.
Compared with the prior art, the modulation circuit of process box chip provided by the utility model comprises resistance R 2, resistance R 3, triode Q1 and triode Q2, when process box chip when carrying out read operation, after the triode Q1 of modulation circuit conducting, current-limiting resistance R1 and resistance R 2 form parallel circuit, be connected in series with MCU, the electric current that electric contact a transmits will all be supplied to MCU again, make MCU obtain maximum voltage.
Description of drawings
Fig. 1 is the internal electrical catenation principle figure of existing process box chip;
Fig. 2 is the internal electrical catenation principle figure of process box chip described in the utility model.
Be described in further detail below in conjunction with embodiment and accompanying drawing thereof.
Embodiment
As shown in Figure 2, process box chip 1 comprises electric contact a and the b that contacts respectively with the power supply of printer chip and ground, with the continuous current-limiting resistance R1 of electric contact a, be connected on the capacitor C 1 between current-limiting resistance R1 and the ground, with the continuous demodulator circuit 2 of electric contact a, be connected the MCU3 of the output terminal of demodulator circuit, be connected the output terminal of MCU3 and the modulation circuit 5 between the electric contact a, modulation circuit 5 comprises resistance R 2, resistance R 3, triode Q1 and triode Q2, resistance R 2 is connected between the collector of the end of current-limiting resistance R1 and triode Q2, the emitter of triode Q2 links to each other with electric contact a, resistance R 3 is connected between the base stage of the collector of triode Q1 and triode Q2, the base stage of triode Q1 connects the pin IO3 of MCU3, the grounded emitter of triode Q1.
When carrying out write operation, printer sends power supply to by electric contact a pin IO2 and the modulation circuit 5 of current-limiting resistance R1, capacitor C 1, demodulator circuit 2, MCU3, simultaneously, send the signal that carries in the power supply to demodulator circuit 2, demodulator circuit 2 comes out to send to the pin IO1 of MCU3 with the signal demodulation, afterwards, MCU3 writes internal storage with the information of this signal representative, thereby finishes write operation.
When carrying out read operation, printer sends power supply to current-limiting resistance R1 by electric contact a, capacitor C 1, demodulator circuit 2, the pin IO2 of MCU3 and modulation circuit 5, simultaneously, send the signal that carries in the power supply to demodulator circuit 2, demodulator circuit 2 comes out to send to the pin IO1 of MCU3 with the signal demodulation, after receiving this signal, the MCU3 storer data that printer is required internally reads, and the pin IO3 of MCU3 is by the control output high level of internal processes, make the triode Q1 and the whole conductings of Q2 of modulation circuit 5, promptly, under the situation of triode Q2 conducting, after current-limiting resistance R1 and resistance R 2 are in parallel, connect with MCU3 again, modulation circuit 5 is modulated the back with data and is sent to the chip of printer by electric contact a and b, thereby finishes read operation.
Obviously, because the modulation circuit 5 of process box chip 1 provided by the utility model comprises resistance R 2, resistance R 3, triode Q1 and triode Q2, when process box chip 1 when carrying out read operation, after the triode Q1 of modulation circuit 5 conducting, current-limiting resistance R1 and resistance R 2 form parallel circuit, be connected in series with MCU3, the electric current that electric contact a transmits will all be supplied to MCU3 again, make MCU3 obtain maximum voltage.
For the professional and technical personnel, the utility model also exists the simple malformation of other.Therefore, the utility model is not limited to shown in above-mentioned detailed description and the embodiment with regard to its more wide form.In addition, just as appended technical scheme and equivalent limit, many distortion can also be arranged and do not depart from the aim of total invention.
Claims (2)
1, process box chip comprises
The electric contact a and the b that contact respectively with the power supply of printer chip and ground;
With the continuous current-limiting resistance R1 of electric contact a;
With the continuous demodulator circuit of electric contact a;
Be connected the MCU of the output terminal of demodulator circuit;
It is characterized in that:
Described process box chip further comprises
Be connected the output terminal of MCU and the modulation circuit between the electric contact a, it comprises resistance R 2, resistance R 3, triode Q1 and triode Q2, resistance R 2 is connected between the collector of the end of current-limiting resistance R1 and triode Q2, the emitter of triode Q2 links to each other with electric contact a, resistance R 3 is connected between the base stage of the collector of triode Q1 and triode Q2, and the base stage of triode Q1 connects the output terminal of MCU.
2, process box chip according to claim 1 is characterized in that:
Described process box chip further comprises a filter capacitor C1, and it is connected between current-limiting resistance R1 and the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620058739 CN2901379Y (en) | 2006-05-06 | 2006-05-06 | Processing box chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620058739 CN2901379Y (en) | 2006-05-06 | 2006-05-06 | Processing box chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2901379Y true CN2901379Y (en) | 2007-05-16 |
Family
ID=38085543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620058739 Expired - Fee Related CN2901379Y (en) | 2006-05-06 | 2006-05-06 | Processing box chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2901379Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009127156A1 (en) * | 2008-04-17 | 2009-10-22 | 珠海天威技术开发有限公司 | Chip and consumable container |
| CN101887233A (en) * | 2010-07-01 | 2010-11-17 | 珠海艾派克微电子有限公司 | Imaging case chip of imaging equipment, imaging case and imaging equipment |
| CN102173206A (en) * | 2011-01-06 | 2011-09-07 | 珠海天威技术开发有限公司 | Consumable chip and consumable container |
-
2006
- 2006-05-06 CN CN 200620058739 patent/CN2901379Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009127156A1 (en) * | 2008-04-17 | 2009-10-22 | 珠海天威技术开发有限公司 | Chip and consumable container |
| CN101887233A (en) * | 2010-07-01 | 2010-11-17 | 珠海艾派克微电子有限公司 | Imaging case chip of imaging equipment, imaging case and imaging equipment |
| CN102173206A (en) * | 2011-01-06 | 2011-09-07 | 珠海天威技术开发有限公司 | Consumable chip and consumable container |
| WO2012092872A1 (en) * | 2011-01-06 | 2012-07-12 | 珠海天威技术开发有限公司 | Consumable chip and consumable container |
| CN102173206B (en) * | 2011-01-06 | 2013-04-10 | 珠海天威技术开发有限公司 | Consumable chip and consumable container |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070516 Termination date: 20120506 |