Article comprising a micro-machined filter

Details Article comprising a micro-machined filter Article comprising a micro-machined filter

1998-01-20

1999-10-05

Chin, Wellington

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

455339, 455313, 455338, H04B 110

Patent

active

059638575

ABSTRACT:
An article comprising a micro-machined filter advantageously comprises a micro-machined resonator, a drive circuit and a detection circuit, at least a portion of which are circuits are disposed on the resonator within a magnetic field. In operation, an input signal is delivered to the drive circuit. The resonator is excited to movement by the Lorentz force that is generated as signal current varies. Due to the resonator's movement, a voltage is induced in the detection circuit, which moves with the resonator. Using well-known micro-machining techniques, a resonator can be made that has mechanical resonance frequencies extending into the GHz regime. Under proper conditions, such resonances advantageously exhibit very high Q-values, so that the resonator shows a significant physical response (e.g., movement) over a very narrow range of excitation frequency. When the frequency of the input signal matches such a frequency (i.e., the resonant frequency), the device generates a voltage having such a frequency.

REFERENCES:
patent: 4853660 (1989-08-01), Schloemann
patent: 4926143 (1990-05-01), Harada et al.
patent: 5222255 (1993-06-01), Kuo et al.
patent: 5361053 (1994-11-01), Hosokawa et al.
patent: 5455547 (1995-10-01), Lin et al.
patent: 5491604 (1996-02-01), Nguyen et al.
patent: 5793268 (1997-04-01), Attaiyan

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