Patent ID: 8692615

Claim:
A transconductance circuit, comprising: a complementary set of differential transistor pairs, a first transistor pair having emitters commonly coupled to a first common node and respective collectors coupled to a first pair of output terminals for the transconductance circuit, a second transistor pair having emitters commonly coupled to a second common node, and respective collectors coupled to a second pair of output terminals for the transconductance circuit; each pair having a first transistor to receive a first input voltage at its corresponding base, and a second transistor to receive a second input voltage at its corresponding base; an impedance coupled between the first and second common nodes; complementary sets of doublet differential transistor pairs, each doublet circuit comprising a complementary set of doublet differential transistor pairs, a first transistor of each pair to receive the first input voltage at its base, a second transistor of each pair to receive the second input voltage at its base; a first differential transistor pair of each set wherein the first and second transistors having emitters coupled to a corresponding current source, the first and second transistors having collectors coupled respectively to the first pair of output terminals; a second differential transistor pair of each set wherein the first and second transistor having emitters coupled to a corresponding current source, the first and second transistors having collectors coupled respectively to the second pair of output terminals; and the first and second transistor of each doublet differential pair having area offsets opposed to each other.