A method to lower signal range of a switching and/or logic circuit or amplifiers/attenuators below supply range in order to optimize amplitude swing in regard of power consumption, the method comprising the steps of: - providing a switching or logic circuit with positive (Vsup) and negative supply (ground) rails comprising one or more stages; - lowering the signal range generated by all logic devices of the switching and/or logic circuit below the supply range by adding for each circuit stage one or two generic device networks (V1, V2), wherein each generic device network comprises a voltage source configured to establish a voltage drop between the circuit and an associated supply rail, wherein the signal swings between a positive reference voltage, provided by the voltage drop in regard of the positive supply rail, and a negative reference voltage, provided by the voltage drop in regard of the negative supply rail, and wherein each of the voltage drops is constant and is independent of current flowing through the generic device networks; - decoupling the signal range from biasing voltage by providing a DC biasing network comprising biasing voltage sources (Vp, Vn) providing biasing voltages as required and corresponding resistors providing impedances required, wherein each biasing voltage source (Vp1, Vp2, Vn1, Vn2) is connected to a correspondent resistor (R11, R12, R21, R22) in series and a terminal of the correspondent resistor (R11, R12, R21, R22) is connected to a gate of a correspondent logic device of the switching and/or logic circuit, wherein negative terminals of all said biasing voltage sources (Vp1, VP2, Vn1, Vn2) are directly connected to the negative supply rail (ground) and wherein said biaising voltage sources are independent of the one or more generic device networks, and wherein the signal range is independent from the biasing voltages; and - providing AC signal coupling of active devices of the circuit by a capacitive network comprising capacitive means (C1, C2) to couple AC signals of a stage to the next following stage, wherein a first stage of the circuit is configured to receive an AC signal from the input port of the circuit and to couple the AC signal via respective capacitive means (C1,C2) of the capacitive network from the input port of the circuit to the corresponding gates of correspondent active devices of the first stage, wherein the AC coupling network is configured to AC couple an output signal of each stage to one or more gates of correspondent active devices of the next following stage. - providing a switching or logic circuit with positive (Vsup) and negative supply (ground) rails comprising one or more stages; - lowering the signal range generated by all logic devices of the switching and/or logic circuit below the supply range by adding for each circuit stage one or two generic device networks (V1, V2), wherein each generic device network comprises a voltage source configured to establish a voltage drop between the circuit and an associated supply rail, wherein the signal swings between a positive reference voltage, provided by the voltage drop in regard of the positive supply rail, and a negative reference voltage, provided by the voltage drop in regard of the negative supply rail, and wherein each of the voltage drops is constant and is independent of current flowing through the generic device networks; - decoupling the signal range from biasing voltage by providing a DC biasing network comprising biasing voltage sources (Vp, Vn) providing biasing voltages as required and corresponding resistors providing impedances required, wherein each biasing voltage source (Vp1, Vp2, Vn1, Vn2) is connected to a correspondent resistor (R11, R12, R21, R22) in series and a terminal of the correspondent resistor (R11, R12, R21, R22) is connected to a gate of a correspondent logic device of the switching and/or logic circuit, wherein negative terminals of all said biasing voltage sources (Vp1, VP2, Vn1, Vn2) are directly connected to the negative supply rail (ground) and wherein said biaising voltage sources are independent of the one or more generic device networks, and wherein the signal range is independent from the biasing voltages; and - providing AC signal coupling of active devices of the circuit by a capacitive network comprising capacitive means (C1, C2) to couple AC signals of a stage to the next following stage, wherein a first stage of the circuit is configured to receive an AC signal from the input port of the circuit and to couple the AC signal via respective capacitive means (C1,C2) of the capacitive network from the input port of the circuit to the corresponding gates of correspondent active devices of the first stage, wherein the AC coupling network is configured to AC couple an output signal of each stage to one or more gates of correspondent active devices of the next following stage.