A simple rail-to-rail CMOS voltage follower

Purpose - The paper aims to present a simple rail-to-rail CMOS voltage follower. Design/methodology/approach - The circuit is developed based on a complementary source follower with a common-source output stage. The circuit is designed using a 0.13 μm CMOS technology, and operates under the supply voltage of 1.5 V. HSPICE is used to verify the circuit performance. Findings - The simulations show output voltage swing of ±0.6 V (300 Ω load) with the total harmonic distortion of 0.55 per cent at the operating frequency of 3 MHz. The bandwidth and power dissipation are 657 MHz and 405 μW, respectively. Originality/value - A simple rail-to-rail CMOS voltage follower is presented. © Emerald Group Publishing Limited.