Articles written in Sadhana

    • Low power flipped voltage follower current mirror with improved input output impedances


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      High performance sub-volt current mirror are widely used in building mixed-mode low power VLSI systems. The performance of current mirror is decided by its key parameters which includes large operating range, low input compliance voltage, wide swing, large bandwidth along with very low input and very highoutput resistances. In this paper, a design of high performance low power current mirror is shown. The proposed current mirror is based on flipped voltage follower which enables the current mirror to work at low voltage. For improvement in input output resistance the proposed current mirror is employed with super transistor and super cascode stage. The current mirroring with minimum error is achieved till 1mA with power dissipation in the range of micro watt. The achieved bandwidth is 2.1 GHz along with low input and high output resistances as 0.407 ohm and 50 giga ohm, respectively. The process corner, temperature analysis and noise analysis of the proposed current mirror is also shown in this paper. The complete analysis is done using HSpice on 0.18 umtechnology at a dual supply voltage of 0.5 V.

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