A 1-V Gm-C low-pass filter for UWB wireless application

This paper proposes a high performance G_m-C equiripple linear phase low-pass filter for UWB wireless application. The proposed OTA is designed under low power supply voltage consideration while its gain, excess phase, and linearity are well maintained. The common-mode control system, including common-mode feedback (CMFB) and common-mode feedforward (CMFF) circuits, is added to ensure stability of the proposed filter. Measurement results show that the inter-modulation distortion (IM3) of -40 dB can be achieved with 250 MHz 400 mV_pp balanced differential input signals. The filter works in 1-V supply voltage and its power consumption is 32 mW.