Patent ID: 7528654

Claim:
An analog transconductance amplifier comprising: an input stage comprising a first transistor and a second transistor connected in series to said first transistor, said first and second transistors connected between positive and negative voltages and being respectively controlled by an input voltage and a first control voltage for generating a normalized drive voltage; an amplification stage comprising a first conduction path comprising an amplification transistor being controlled by the normalized drive voltage, and a first load transistor connected in series to said amplification transistor and being controlled by a second control voltage, a second conduction path comprising at least one second load transistor being controlled by a third control voltage, a current mirror for forcing through said second conduction path a replica of current flowing through said first conduction path; an output stage transistor for delivering an output current based on the input voltage, and being controlled by a voltage on said second load transistor; and said first and second transistors, said amplification transistor, said first load transistor, said at least one second load transistor, and said output stage transistor each comprising a field effect transistor of a same conductivity type.