According to an aspect, there is provided a single-ended-to-differential complementary metal-oxide-semiconductor, SE2D CMOS, transconductance amplifier for a radio receiver. The SE2D CMOS transconductance amplifier comprises an input for receiving a radio frequency signal, first common-source n-type metal-oxide-semiconductor. CS NMOS (M1), and common-source p-type metal-oxide-semiconductor, CS PMOS, transistors (M5), second CS NMOS (M2) and CS PMOS (M6) transistors, a cross-coupled cascode stage for adjusting balance of the radio frequency currents outputted by the first (M1) and second (M2) CS NMOS transistors and a differential output. The first (M1) and second (M2) CS NMOS transistors have substantially equal transconductances and the first (M5) and second (M6) CS PMOS transistors have substantially equal transconductances. The first and second cross-coupled cascode NMOS transistors have substantially equal transconductances.