A METASTABILITY DETECTION AND CORRECTION CIRCUIT FOR SET RESET LATCH

摘要

The present invention relates to a metastability detection and correction circuit of an SR latch which detects and corrects metastability of SR latch decision in a successive approximation type analog digital converter structure using the SR latch which is a differential register. The metastability detection and correction circuit of the SR latch includes: an input part which receives a first output and a second output, an enable signal enabling the SR latch, and a clock informing the elapse of previously assigned comparison operation time of a comparator from the SR latch connected to a rear of the comparator of a successive approximation type analog digital converter; a latch output detection part which is enabled by the first output or the second output when the first output and the second output have an equal value; a comparator operation time detection part which is enabled in response to an edge trigger signal of the clock under the state that the enable signal is enabled; and an output part which outputs a flag signal under the state that the latch output detection part and the comparator operation time detection part are enabled.