Micropower rf transponder

H - Electricity – 04 – B

Patent

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H04B 1/59 (2006.01) H04B 1/16 (2006.01) H04B 1/30 (2006.01)

Patent

CA 2199123

A micropower RF transponder (10) employs a novel adaptation of the superregenerative receiver wherein the quench oscillator (14) is external to the regenerative transistor (15). The quench oscillator (14) applies an exponentially decaying waveform rather than the usual sinewave to achieve high sensitivity at microampere current levels. A circuit simplifications for antenna coupling, extraction (22) of the detected signal and a low voltage bias (25).

Un transpondeur RF (10) à très faible consommation comporte une nouvelle adaptation de récepteur à super-réaction, où un oscillateur à amortissement (14) est externe par rapport au transistor régénératif (15). L'oscillateur à amortissement (14) applique une forme d'onde à amortissement exponentiel plutôt que la forme d'onde sinusoïdale habituelle pour assurer une haute sensibilité à des niveaux de courants de l'ordre du microampère. On décrit des simplifications du circuit pour un couplage d'antenne, une extraction (22) du signal détecté et une polarisation basse tension (25).

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