Patent ID: 8836375
Filing Date: 2014-09-16
Classification: H03K

Abstract:
1. A comparator apparatus, comprising: a preamplifier and at least one latched comparator connected to said preamplifier to compare input voltage signals to predefined reference voltage signals, said at least one latched comparator responsive to an offset that limits the minimum input differential voltage signal with respect to said predefined voltage signals; a calibration component electrically connected to said at least one latched comparator and said preamplifier, wherein said calibration component assists in measuring and compensating said offset in order to calibrate changes in said offset that arise due to electrical variations thereof; and wherein said at least one latched comparator comprises a delay latch that stores a decision output by said at least one latched comparator, wherein said delay latch stores said decision after sampling a common reference voltage and an input offset with respect to said input voltage signals during a reset phase of said at least one latched comparator.