An integrated circuit includes a first logic circuit region comprising a first regional clock network for supplying a first regional clock signal to digital logic circuit(s); and a clock gating circuit to derive the first regional clock signal from a clock signal and selectively apply and interrupt the first regional clock signal in accordance with a state select signal. The first logic circuit region comprises a first back bias voltage grid connected to respective bodies of PMOS transistors of the digital logic circuit(s) and a second back bias voltage grid connected to respective bodies of NMOS transistors of the digital logic circuit(s). The integrated circuit further comprises a controllable back bias voltage generator configured to adjust a first back bias voltage of the first back bias voltage grid, and to adjust a back bias voltage of the second back bias voltage grid, in accordance with the state select signal.