Abstract
Quiescent current monitoring is an interesting and efficient technique for mixed-signal testing where fault detection of analog parts requires the precise measure of the I/sub ddq/. This paper presents a very simple current sensor for on-chip current monitoring giving a precise analog output proportional to the quiescent current. Simulations show feasibility of the sensor to operate at high frequencies. This circuit may also operate at low supply voltage (/spl plusmn/1.5 V), and due to its simplicity, the silicon area overhead is very small.
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