Transconductor and filter circuit
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsTakashi Morie, Shiro Dosho
Life of this patent
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Abstract
A transconductor which has a transconductance gm and which receives an input voltage VIn and outputs in response to the input voltage Vin an output current Iout of gm×Vin, wherein: the transconductor includes a plurality of sub-transconductors which are connected in parallel to one another; and at least one control signal is input to the plurality of sub-transconductors, and the plurality of sub-transconductors are controlled by the at least one control signal such that at least one of the plurality of sub-transconductors has a negative transconductance, whereby the transconductance gm of the transconductor can be varied.
Claims13
A transconductor which has a transconductance gm and which receives an input voltage Vin and outputs in response to the input voltage Vin an output current Iout of gm×Vin, wherein:
- the transconductor includes a plurality of sub-transconductors which are connected in parallel to one another;
- and
- at least one control signal is input to the plurality of sub-transconductors, and the plurality of sub-transconductors are controlled by the at least one control signal such that at least one of the plurality of sub-transconductors has a negative transconductance, whereby the transconductance gm of the transconductor can be varied.
Dependencies are inferred from the claim text.