| 摘要 |
A reconfigurable frequency filter is provided to solve a problem that a specific filter set needs to be devised and fabricated with regard to each communication standard by offering a filter stage adjustable to various communication standards. In a reconfigurable frequency filter, a reconfigurable Gm(transconductance) circuit module(500) includes first Gm circuit(510) and second Gm circuits(520,530). The second Gm circuit is connected in parallel to the first Gm circuit connected between an input node and an output node. The individual Gm circuit includes first and second PMOSs(Positive channel Metal Oxide Semiconductor) and first and second NMOSs(Negative channel Metal Oxide Semiconductor), wherein the drain of the first PMOS is connected to the source of the second PMOS and the drain of the first NMOS is connected to the source of the second NMOS. Gm values across the input/output nodes are reconfigurable by selectively switching one or two Gm circuits.
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