CN202383709U - Novel magnetic card reading circuit structure - Google Patents
Novel magnetic card reading circuit structure Download PDFInfo
- Publication number
- CN202383709U CN202383709U CN 201120544954 CN201120544954U CN202383709U CN 202383709 U CN202383709 U CN 202383709U CN 201120544954 CN201120544954 CN 201120544954 CN 201120544954 U CN201120544954 U CN 201120544954U CN 202383709 U CN202383709 U CN 202383709U
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- circuit
- magnetic card
- novel magnetic
- card reading
- reshaping
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Abstract
The utility model discloses a novel magnetic card reading circuit structure, which comprises a read head, an amplification filter circuit, a time delay circuit, a comparison reshaping circuit and a processor, wherein an output end of the read head is connected with an input end of the amplification filter circuit; the output end of the amplification filter circuit is connected with the input end of the time delay circuit; the output end of the time delay circuit is connected with the input end of the comparison reshaping circuit; and the output end of the comparison reshaping circuit is connected with the processor. The novel magnetic card reading circuit structure has the advantages that by employing operational amplifiers as few as possible, the amplification reshaping of a magnetic card reading signal is realized; a high-gain first-stage operational amplifier circuit or an automatic gain control (AGC) circuit is not required, and the amplification reshaping of magnetic card signals at different card speeds can be realized, so the cost of a circuit is greatly reduced, and the circuit is simplified; and the novel magnetic card reading circuit structure is low in cost, general and small in quantity of peripheral circuits.
Description
Technical field
The utility model relates to a kind of circuit structure of novel magnetic card Card Reader.
Background technology
In the existing magnetic card Card Reader process, the weak triangular signal that reads two magnetic tracks by reading head amplifies and is shaped to the F2F square-wave signal.In this process, the amplification of magnetic card Card Reader signal, the common way of shaping are to read the weak triangular signal of stamping the card of 20-30mV, through two stage amplifer, realize through a hysteresis loop comparator more earlier.Simultaneously, the Card Reader process also need adopt a voltage follower that reference voltage is provided, and must be provided with 4 discharge circuits like this in the circuit, and peripheral circuit is also very complicated.So existing magnetic card Card Reader circuit structure is complicated, cost is high.
Summary of the invention
In order to overcome the deficiency of prior art, the purpose of the utility model is to provide a kind of circuit structure of the simple in structure and novel magnetic card Card Reader that cost is low.
The circuit structure of a kind of novel magnetic card Card Reader of the utility model; It comprises reading head, amplification filtering circuit, delay circuit, comparison shaping circuit and processor; The output terminal of said reading head connects the input end of amplification filtering circuit; The output terminal of amplification filtering circuit connects the input end of delay circuit, and the output terminal of delay circuit connects the relatively input end of shaping circuit, relatively the connection processing device of the output of shaping circuit.
Said amplification filtering circuit is made up of U1A, resistance R 1 and R2, capacitor C 1.
Said relatively shaping circuit is made up of U1B, resistance R 3 and R4.
The utility model adopts the least possible amplifier; Realize the amplification shaping of magnetic card Card Reader signal, need not the first order discharge circuit or AGC (automatic gain control) circuit of high-gain, just can realize that the magnetic card signal of various card speed amplifies shaping; Thereby reduce circuit cost greatly, and simplify circuit.
The advantage of the utility model also comprises:
1, low cost: amplification, the shaping of a weak triangular signal that one 4 road operational amplifier of need employing can be realized reading head is read;
2, versatility: the utility model adopts general 4 road amplifiers, and promptly modal on the market PIN-TO-PIN operational amplifier when going wrong, can directly be replaced.
3, the peripheral components of the utility model circuit structure is few.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation:
Fig. 1 is the structural representation of the circuit structure of a kind of novel magnetic card Card Reader of the utility model;
Fig. 2 is the utility model physical circuit figure.
Embodiment
Like Fig. 1 or shown in Figure 2; The utility model comprises reading head 1, amplification filtering circuit 2, delay circuit 3, compares shaping circuit 4 and processor 5; The output terminal of said reading head 1 connects the input end of amplification filtering circuit 2; The output terminal of amplification filtering circuit 2 connects the input end of delay circuit 3, and the output terminal of delay circuit 3 connects the relatively input end of shaping circuit 4, relatively the connection processing device 5 of the output of shaping circuit 4.
As shown in Figure 2, said amplification filtering circuit 2 is made up of U1A, resistance R 1 and R2, capacitor C 1.
Said relatively shaping circuit 3 is made up of U1B, resistance R 3 and R4.
The utility model adopts four operational amplifiers, reads the weak triangular signal of two magnetic card magnetic tracks, and wherein each magnetic track only needs two operational amplifiers.The weak triangular signal that reading head 1 reads each magnetic track sends to amplification filtering circuit 2; Amplification filtering circuit 2 amplifies the signal that receives, send to delay circuit 3 after the filtering; Delay circuit 3 carries out the signal that receives phase delay and sends to comparison shaping circuit 4; Relatively shaping circuit 4 with the signal that receives with amplify before signal compare, thereby realize shaping, relatively shaping circuit 4 is given processor 5 with orthopedic signal again and is carried out noise reduction, decoding.
Claims (3)
1. the circuit structure of a novel magnetic card Card Reader; It is characterized in that: it comprises reading head, amplification filtering circuit, delay circuit, comparison shaping circuit and processor; The output terminal of said reading head connects the input end of amplification filtering circuit; The output terminal of amplification filtering circuit connects the input end of delay circuit, and the output terminal of delay circuit connects the relatively input end of shaping circuit, relatively the output terminal connection processing device of shaping circuit.
2. the circuit structure of novel magnetic card Card Reader according to claim 1 is characterized in that: said amplification filtering circuit is made up of operational amplifier U1A, resistance R 1 and R2, capacitor C 1.
3. the circuit structure of novel magnetic card Card Reader according to claim 1 is characterized in that: said relatively shaping circuit is made up of operational amplifier U1B, resistance R 3 and R4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120544954 CN202383709U (en) | 2011-12-22 | 2011-12-22 | Novel magnetic card reading circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120544954 CN202383709U (en) | 2011-12-22 | 2011-12-22 | Novel magnetic card reading circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202383709U true CN202383709U (en) | 2012-08-15 |
Family
ID=46632198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120544954 Expired - Fee Related CN202383709U (en) | 2011-12-22 | 2011-12-22 | Novel magnetic card reading circuit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202383709U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117720A (en) * | 2013-01-16 | 2013-05-22 | 东南大学 | Self-adaptation control gain method in magnetic card decoding chip |
-
2011
- 2011-12-22 CN CN 201120544954 patent/CN202383709U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117720A (en) * | 2013-01-16 | 2013-05-22 | 东南大学 | Self-adaptation control gain method in magnetic card decoding chip |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20201222 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |