This work presents a low power, pS transconductor (OTA) based on a new transconductance reduction technique. The circuit is intended for bio-sensing in low-power wearable biomedical devices. Instead of pseudo-resistors based techniques, the proposed OTA-C allies two circuit techniques: current splitting and modified series-parallel current mirrors. With a power supply at 1V, the new concept is demonstrated through a 450 pA/V transconductor, which was used to build a lowpass filter with a large time constant while keeping a small-size capacitor. The circuits and simulations were done with TSMC 0.18 µm node using Cadence's IC design tools. The new topology combines characteristics such as low transconductance, low power, and moderate gain, which fills some important needs in bio-sensing circuit design.