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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0048541 (1993-04-14) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 250 인용 특허 : 0 |
A transponder (14) for communicating with an interrogator (12) has a high Q-factor resonant circuit (34) of frequency f1 for receiving RF powering signals. The transponder also has a tuning circuit (56,58) which when in electrical communication with the resonant circuit (34) is operable to form a lo
A transponder (14) for communicating with an interrogator (12) has a high Q-factor resonant circuit (34) of frequency f1 for receiving RF powering signals. The transponder also has a tuning circuit (56,58) which when in electrical communication with the resonant circuit (34) is operable to form a lower Q-factor resonant circuit (60) of frequency f3 for receiving RF communications from the interrogator unit. The transponder also includes a demodulator (66) which is in electrical communication with said resonant circuit (34). Additionally, the transponder (14) also included a control circuit (40) which receives a demodulated data signal from the demodulator (66). The control circuit (40) is further connected to the tuning circuit (56,58) and is operable to connect the tuning circuit (56,58) to the high Q-factor resonant circuit (34) in order to form the lower Q-factor resonant circuit (60). Control circuit (40) also converts the RF powering signals to a DC current for storing energy. The energy is stored in an energy storage device such as a storage capacitor (46). Other devices, methods and systems are disclosed.
A transponder for communicating with an interrogator unit, said transponder comprising: a) a high Q-factor resonant circuit of frequency f1 for receiving RF powering signals; b) a tuning circuit which when in electrical communication with said resonant circuit is operable to form a lower Q-factor re
A transponder for communicating with an interrogator unit, said transponder comprising: a) a high Q-factor resonant circuit of frequency f1 for receiving RF powering signals; b) a tuning circuit which when in electrical communication with said resonant circuit is operable to form a lower Q-factor resonant circuit of frequency f3 for receiving RF communications from said interrogator unit; c) a control circuit which is in electrical communication with said high Q-factor resonant circuit and said tuning circuit and is operable to connect said tuning circuit to said high Q-factor resonant circuit in order to form said lower Q-factor resonant circuit, said control circuit further operable to convert said RF powering signals to a DC current for storing energy, said control circuit still further operable to demodulate signals received by said lower Q-factor resonant circuit; and d) an energy storage device for storing the energy received in said DC current from said control circuit.
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