RECONFIGURABLE DELAY CIRCUIT, DELAY MONITOR CIRCUIT USING SAID DELAY CIRCUIT, VARIATION CORRECTION CIRCUIT, VARIATION MEASUREMENT METHOD, AND VARIATION CORRECTION METHOD

摘要

A delay circuit (10) containing a first inverting circuit, which contains a pull-up circuit (2) and a pull-down circuit (3), and a second inverting circuit, which contains a pull-up circuit (4) and a pull-down circuit (5). The delay circuit also contains: a first pass transistor (6) connected in series to the pull-up circuit of the first inverting circuit between a power supply potential and an output node; a second pass transistor (7) connected in series to the pull-down circuit (2) of the first inverting circuit between a ground potential and the output node (Out); a third pass transistor (8) inserted in series between an input node (In) and the pull-up circuit of the second inverting circuit; and a fourth pass transistor (9) inserted in series between the input node and the pull-down circuit of the second inverting circuit. The delay characteristic of the delay circuit is changed by a combination of control signals (C1-C4) applied to the gates of the first - fourth pass transistors.