Ultra Low Power Tunable Transconductor

This paper presents ultra-Low power (ultra-LP) Low voltage (LV) tunable transconductor (Gm) and its application to implement Gm-C filter. The CMOS structure of the Gm is performed using bulk-driven (BD) MOST technique, thus it can operate with extremely low voltage supply of ±0.3 V using 0.18 μm CMOS process. Moreover, it consumes ultra-LP about 4.9 μW. The simple topology, proper operating range, and tunability make this transconductor attractive. The transconductor and the Gm-C filter have been examined using simulation program Pspice