METHODS AND ARRANGEMENTS FOR AN N-PATH FILTER USING A FOURTH ORDER ALL POLE DRIVING POINT IMPEDANCE
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United States of America Patent
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Issued Date -
Mar 27, 2025
app pub date -
Sep 25, 2023
filing date -
Sep 25, 2023
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Abstract
Embodiments may comprise N-path filter circuitry with tunable radio frequency selectivity and up to 80 decibels per decade roll-off. The N-path filter may comprise at least one input transistor, wherein the at least one input transistor comprises a channel and a gate. A first end of the channel is coupled with a receiver circuitry input, wherein a second end of the channel is coupled with a load. The gate of the at least one input transistor is coupled with a clock circuitry input. The load may comprise a fourth order, all-pole driving point impedance. The impedance may shunt the second end of the channel to a circuit ground or a low voltage circuit rail via the impedance. And the impedance may comprise a first active impedance circuit coupled in series with a second active impedance circuit.
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