Bandwidth extension of voltage follower using DTMOS transistor

In this paper, we have proposed a new approach to improve the bandwidth of unity gain voltage follower. This approach is based on using a dynamic threshold MOS transistor (DTMOS). The bandwidth of the proposed voltage follower has been enhanced by a factor of nearly 2.5. Use of DTMOS transistor also improves the input signal range of the proposed voltage follower. The proposed and conventional circuits have been mapped on to the 180 nm CMOS technology. Simulations at low supply voltage of 1 Volt validate the proposed voltage follower cell. A squarer circuit designed using proposed follower also shows wideband operation as compared to its conventional version. Thus proposed voltage follower is promising for low voltage wideband applications.