Patent ID: 6337585
Filing Date: 2002-01-08
Classification: H03G

Abstract:
A transconductor comprising:a voltage input terminal; a current output terminal connected to a collector of a first transistor; a supply voltage terminal connected to a collector of a second transistor; first and second control voltage terminals, having first and second control voltages, respectively, wherein the first control voltage terminal is connected to a base of the first transistor via a first resistor and the second control voltage terminal is connected to a base of the second transistor via a second resistor so that the first and second control voltages applied to the first and second control voltage terminals terminals, respectively, causes transconductance of the transconductor to vary; wherein the voltage input terminal is connected to the respective bases of the first and second transistors via first and second capacitors, respectively; wherein the emitters of the respective first and second transistors are interconnected and are connected to ground via a common third resistor; and wherein the transconductor includes only two transistors, namely the first and second transistors.