Transconductance amplifier

摘要

A transconductance amplifier has a pair of input terminals and a pair of output terminals. A first pair of transconductors is connected to the input terminals and the output terminals. A second pair of transconductors has inputs connected to output terminals, and outputs connected to the opposing output terminals. A third pair of transconductors has both its inputs and its outputs connected to the output terminals. One or more of the transconductors have a control port for a control signal to adjust its transconductance. The control signal may switch the transconductance of this or these transconductors between two or more values. One or more of the transconductors in the transconductance amplifier may include a tri-state inverter, which may be enabled or disabled through a control port.

主权项

1. A transconductance amplifier comprising:
a pair of input terminals for receiving an input signal; a pair of output terminals for providing an output signal; a first pair of transconductors each comprising:
an input port electrically coupled with a respective one of the pair of input terminals; andan output port electrically coupled with a respective one of the pair of output terminals; a second pair of transconductors each comprising:
an input port electrically coupled with a respective one of the pair of output terminals; andan output port electrically coupled with the other of the pair of output terminals; a third pair of transconductors each comprising:
an input port; andan output port electrically coupled with its input port and also with a respective one of the pair of output terminals, wherein at least one of the transconductors includes a control port, different from a power supply port, wherein the control port is configured to receive a control signal for adjusting a transconductance of the at least one of the transconductors.