Low power startup circuits for voltage and current reference with zero steady state current

Authors:
Qadeer Ahmad Khan;Sanjay Kumar Wadhwa;Kulbhushan Misri
Affiliations:
Motorola India Limited, Gurgaon, Haryana, India;Motorola India Limited, Gurgaon, Haryana, India;Motorola India Limited, Gurgaon, Haryana, India
Venue:
Proceedings of the 2003 international symposium on Low power electronics and design
Year:
2003

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Abstract

A class of new startup circuits for Voltage and Current Reference circuits are proposed. Unlike conventional startup circuits, the proposed circuits completely turn off once the reference circuit is started and consume no current during normal operation of the reference circuits. The circuits employ feedback from the reference circuit to ensure that the reference circuit has reached its desired operating state prior to shutting themselves off. The proposed circuits are quite useful in low power integrated circuit design. Very low startup time can be achieved. The circuits are generic in nature and can be used with any reference circuit such as bandgap voltage reference, ΔVgs/R circuit, etc.