Wavecom GR64 UART Sleep Protocols Specifikace Strana 47
- Strana / 141
- Tabulka s obsahem
- KNIHY
Hodnocené. / 5. Na základě hodnocení zákazníků
5.4. HARDWARE
Figure 5.6: RFID antenna driver circuitry using push-pull output stage
resonant circuit, tuned to 130kHz. Thereafter, the signal is again amplified
into saturation to provide a 5V logic level square-wave representation of the
received signal. B ased on the width of the pulses, the frequency of the signal
can be determined (see Section 5.5 for details of this calculation).
Recall that the potential across the antenna terminals is likely to be in the
order of hundreds of volts due to the high-Q nature of the tuned circuit. It is
thus impossible to feed this voltage directly into any low voltage component
such as an opamp. The solution is to AC couple the antenna through a
resistor and then diode-clamp the signal at supply levels before feeding it
into the first amplifier stage. Due to the relatively high input impedance
(1kΩ), the operation of the receiver does not significantly impact the tuning
of the transmitter output stage, and the same antenna can thus be used for
sending and receiving. This does, however, mean that the antenna must be
capable of receiving both the 123.4kHz and 134.2kHz signals. The “Q” of the
circuit is thus limited by the required bandwidth of approximately 10kHz.
The LF353 dual FET input op-amp was chosen as the primary amplifier
mainly due to its high bandwidth product and high input impedances coupled
with its low cost. Two of these devices form the first amplifier stages, before
the tuned filter. The total gain of this stage is 1000. Both LF353 s are
powered directly from the 12V battery rather than the 5V logic rail to provide
additional headroom for the signal. Although this supply is unregulated, the
battery represents a low-impedance source and during the receive phase, the
high-current transmitters are disabled. Thus, the 12V remains smooth (as
opposed to the 5V rail which powers digital logic from a SMPS). The non-
inverting inputs of these op-amps are biased at half of the supply and each
34
- Low Cost 1
- Penguin RFID Reader 1
- Abstract 2
- Acknowledgements 3
- Declaration 4
- Contents 5
- List of Figures 9
- List of Tables 11
- Glossary 12
- Chapter 1 15
- Introduction 15
- 1.3 Project Timeframe 16
- 1.5 Project Challenges 18
- 1.6 Report Structure 20
- Chapter 2 21
- Analysis of Existing Solution 21
- 2.2 Power Supply 23
- 2.4 Data Delivery 25
- Chapter 3 26
- Device Specification 26
- Chapter 4 29
- Overview of Proposed Solution 29
- 4.3 Uplink Module 31
- 4.4 Interconnections 32
- 4.5 Power Supply 32
- Chapter 5 33
- RFID Reader Design 33
- 5.1.3 Operating Frequency 37
- 5.3.1 64 Data Bits 42
- 5.3.2 CRC Verification 42
- 5.4 Hardware 43
- 5.4. HARDWARE 49
- 5.4.5 Processor 53
- 5.4.6 Interface 56
- 5.4.7 PCB Layout 56
- 5.5 Software 57
- 5.5.2 Capture Stage 58
- 5.5. SOFTWARE 60
- 5.5.3 Decode Stage 61
- 5.6 Design Evaluation 63
- 5.6.4 Power Consumption 67
- Avnett Kopp, September 2006 69
- ZAR9.50 to 1 Euro 69
- Chapter 6 70
- RFID Co-ordinator 70
- 6.2 Software 71
- 6.2.1 Timers 72
- 6.2.2 RFID Reader Request FSM 72
- 6.3 Evaluation 75
- Chapter 7 76
- Uplink Design 76
- 7.3 Hardware Design 80
- 7.3.2 Processor 83
- 7.3.3 User Interface 84
- 7.3.4 Power Supply 85
- 7.4 Software De sign 88
- Except for the I 89
- Details in Section 7.4.5 89
- 7.4.2 Real Time Clock 90
- 7.4.3 User interface 90
- 7.4.4 Peripheral Poll FSM 91
- 7.4.6 Timer FSM 93
- 7.4.7 GSM FSM 94
- 7.4.8 Report Generation FSM 97
- 7.5 Reliability 98
- 7.5.1 Software 99
- 7.5.2 Hardware 100
- Chapter 8 102
- Power Supply 102
- 8.3 Regulator Selection 103
- 8.4.1 Hardware 107
- 40% of 7.5Ah 110
- 8.4.2 Software 111
- 8.5 Measurements 113
- 8.6 Conclusion 114
- Chapter 9 115
- Enclosure Selection and 115
- Mounting Methods 115
- 9.2 Recommendations 116
- Chapter 10 118
- South African Regulations 118
- 10.1 GSM Module 119
- 10.2 RFID Readers 119
- Chapter 11 120
- Conclusion and System 120
- Evaluation 120
- Appendix A 122
- Appendix: RFID Receiver 122
- DUAL-CHANNEL RECEIVER 123
- Appendix B 127
- Appendix: RFID Co-ordinator 127
- B.2. PCB LAYOUT 128
- Appendix C 130
- Appendix: Uplink Module 130
- C.2 List of Uplink Commands 131
- C.3 PCB Design 131
- C.3. PCB DESIGN 133
- Appendix D 137
- Appendix: Power Supply 137
- Appendix E 139
- Appendix: Software 139
- References 140
Související produkty a manuály pro Procesory Wavecom GR64 UART Sleep Protocols
Procesory Wavecom CM52 Uživatelská příručka
(7 stránky)
(7 stránky)
Procesory Wavecom Integra M2106+ Specifikace
(77 stránky)
(77 stránky)
Philips Viva Collection Cuiseur Vapeur manuales
Manuales del propietario y guías del usuario para Para Casa Philips Viva Collection Cuiseur Vapeur.
Ofrecemos 3 manuales en pdf Philips Viva Collection Cuiseur Vapeur para descargar gratis por tipos de documentos: Manual de usuario
Philips Viva Collection Cuiseur Vapeur Manual de usuario (8 paginas)
Marca: Philips | Categoria: For Home | Tamaño: 1.28 MB |
Tabla de contenidos
Philips Viva Collection Cuiseur Vapeur Manual de usuario (2 paginas)
Marca: Philips | Categoria: For Home | Tamaño: 0.69 MB |
Tabla de contenidos
Philips Viva Collection Cuiseur Vapeur Manual de usuario (25 paginas)
Marca: Philips | Categoria: For Home | Tamaño: 4.67 MB |
Tabla de contenidos
Más productos y manuales para Para Casa Philips
| Modelos | Tipo de documento |
|---|---|
| Performer Active Aspirateur avec sac |
Manual de usuario
Philips Performer Active Aspirateur avec sac Manuel d'utilisation,
2 paginas
|
| Kit de remplacement |
Manual de usuario
Philips Kit de remplacement Manuel d'utilisation,
2 paginas
|
| Sorbetière |
Manual de usuario
Philips Sorbetière Manuel d'utilisation [it] ,
2 paginas
|
| 3500 series Fer vapeur |
Manual de usuario
Philips 3500 series Fer vapeur Manuel d'utilisation,
2 paginas
|
| StudioPower Aspirateur avec sac |
Manual de usuario
Philips StudioPower Aspirateur avec sac Manuel d'utilisation,
2 paginas
|
| Bouilloire |
Manual de usuario
Philips Bouilloire User Manual,
10 paginas
|
| Cône de pressage pour robot de cuisine |
Manual de usuario
Philips Cône de pressage pour robot de cuisine Manuel d'utilisation [it] ,
2 paginas
|
| Easy8 Housse de planche à repasser |
Manual de usuario
Philips Easy8 Housse de planche à repasser Manuel d'utilisation,
2 paginas
|
| Aluminium Collection Cuiseur Vapeur |
Manual de usuario
Philips Aluminium Collection Cuiseur Vapeur User Manual,
172 paginas
|
| Viva Collection Mixeur plongeant |
Manual de usuario
Philips Viva Collection Mixeur plongeant Manuel d'utilisation,
3 paginas
|
| Aspirateur à main |
Manual de usuario
Philips Aspirateur à main User Manual,
52 paginas
|
| PerfectCare Pure Cartouche anticalcaire |
Manual de usuario
Philips PerfectCare Pure Cartouche anticalcaire User Manual,
46 paginas
|
| 3300 series Fer vapeur |
Manual de usuario
Philips 3300 series Fer vapeur Manuel d'utilisation,
2 paginas
|
| Saeco GranBaristo Machine espresso Super Automatiq |
Manual de usuario
Philips Saeco GranBaristo Machine espresso Super Automatique Manuel d'utilisation,
3 paginas
|
| Saeco Accessoires d'entretien |
Manual de usuario
Philips Saeco Accessoires d'entretien Benutzerhandbuch,
2 paginas
|
| Roulette avant |
Manual de usuario
Philips Roulette avant Manuel d'utilisation [it] ,
2 paginas
|
| Porte-dosette 2 tasses |
Manual de usuario
Philips Porte-dosette 2 tasses Manuel d'utilisation,
26 paginas
|
| Centrale vapeur haute pression |
Manual de usuario
Philips Centrale vapeur haute pression User Manual [it] ,
86 paginas
|
| Batteur |
Manual de usuario
Philips Batteur Manuel d'utilisation [en] [de] [es] [fr] [it] ,
2 paginas
|
| Cuiseur à riz |
Manual de usuario
Philips Cuiseur à riz Manuel d'utilisation,
2 paginas
|
© 2020, manymanuals.cz. Všechna práva vyhrazena. | 0.043 s |
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Komentáře k této Příručce