| 摘要 |
A transconductance device has substantially linear characteristics. The transconductance device includes a differential pair that receives a differential input voltage signal and produces a differential output current signal and a current source coupled to the differential pair. The current source produces a current having a constant portion and a variable portion, such that the derivative of the transconductance with respect to the differential input voltage is constant across a very large range of the differential input voltage and across a very high range of frequencies of the differential input signal. This linearization technique produces no extraneous noise at the differential output current.
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