Abstract: A monotonic variable gain amplifier which can be controlled to achieve a desired gain. The amplifier has: —at least two amplifier stages (41-45) connected in parallel between input and output terminals, each amplifier stage including: * a fixed gain transconductance amplifier (100, 102) through which a bias current (Ibi) flows controlled by the input signal,—a controllable current divider (104, 106) controllable to vary the ratio of the amount of the bias current (Ibi) that is drawn from a first output point to the amount (l1i) of the bias current that is drawn from a voltage source, and—a control loop (190) to keep a DC voltage combined with an outputted amplified DC current at a constant level.