TRANSCONDUCTOR CIRCUITS WITH PROGRAMMABLE TRADEOFF BETWEEN BANDWIDTH AND FLICKER NOISE

摘要

Transconductor circuits having a programmable tradeoff between bandwidth and flicker noise are disclosed. An exemplary circuit includes an input port, an output port, a plurality of transistors, and a plurality of switches and includes an input port, an output port, and a transistor for placing the transconductor circuit in a first mode of operation or a second mode of operation. and a switch arrangement configured to change coupling between them. The input capacitance of the transconductor circuit operating in the first mode is greater than when the transconductor circuit operates in the second mode. In the first mode, having a larger input capacitance results in reduced flicker noise because the amount of flicker noise is inversely proportional to the input capacitance. In the second mode of operation, having a smaller input capacitance results in increased flicker noise, but this is acceptable for wide-bandwidth applications since wide-bandwidth signals are less sensitive to flicker noise.