In further embodiments, the card may include active circuit elements for switching, powering or processing signals, and passive circuit elements for filtering, matching or damping signals, so that {HEAD ~ few or no connections} to {TAIL ~ outside circuitry} are required 
to
In further embodiments , the card may include active circuit elements for switching , powering or processing signals , and passive circuit elements for filtering , matching or damping signals , so that { HEAD ~ few or no connections } to { TAIL ~ outside circuitry } are required
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