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Radio having a MEMS preselect filter

  • US 7,668,505 B2
  • Filed: 09/10/2004
  • Issued: 02/23/2010
  • Est. Priority Date: 09/10/2004
  • Status: Expired due to Fees
First Claim
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1. A system comprising:

  • an antenna; and

    a pre-select filter in signal communication with the antenna, the pre-select filter comprising;

    a plurality of subfilters configured to filter a received signal, each subfilter comprising;

    a first Micro-Electro-Mechanical Systems (MEMS) filter set comprising a first plurality of MEMS filters in parallel with each other and configured to filter the received signal at a first bandwidth; and

    a second MEMS filter set comprising a second plurality of MEMS filters in parallel with each other and configured to filter the signal filtered by the first MEMS filter set at a second bandwidth that is offset from the first bandwidth;

    wherein the plurality of MEMS filters in the second MEMS filter set are each directly coupled in series to a corresponding one of the plurality of MEMS filters in the first MEMS filter set in a one-to-one coupling relationship; and

    a switch coupled to each of the second plurality of MEMS filters, wherein the switch is activated based on a tuning signal received by the pre-select filter;

    an amplifier in signal communication with the pre-select filter; and

    an analog-to-digital converter in signal communication with and directly connected to the amplifier.

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