Tuning circuit having amplitude-varying function

Details Tuning circuit having amplitude-varying function Tuning circuit having amplitude-varying function

2007-01-30

2007-01-30

Le, Lana (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

C455S150100, C455S200100, C455S193200

Reexamination Certificate

active

10763441

ABSTRACT:
A tuning circuit having an amplitude-varying function is disclosed that comprises a coil, a capacitor, and a resistance-adjusting element connected in parallel to the coil and the capacitor for varying resistance at time of resonance of the tuning circuit, wherein the amplitude of an output signal of the tuning circuit is varied by varying the resistance with the resistance-adjusting element.

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patent: 5699055 (1997-12-01), Dykema et al.
patent: 6184751 (2001-02-01), Siomkos et al.
patent: 6356197 (2002-03-01), Patterson et al.
patent: 6922550 (2005-07-01), van Rumpt
patent: 2005/0147193 (2005-07-01), Umewaka et al.
patent: 10-23084 (1998-01-01), None
Keiji Morijiri et al., “A Wireless Communication System Suitable for Excessive Received Signal.”, Jan. 24, 2003 (Japanese).
Keiji Morijiri et al., “A Wireless Communication System Suitable for Excessive Received Signal by Using New Damping Circuits.”, Jan. 24, 2003 (English).
Won-Seok Oh et al., “A CMOS Transponder IC USing a New Damping Circuit”, Jun. 2002 (English).

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