US Patent 11037607 Strong arm latch with wide common mode range

Described is an apparatus to widen or improve a common mode range of a strong arm latch (SAL). In some embodiments, the SAL comprises a master-slave architecture with a common latch. The apparatus includes: a sampler to sample an input with a first clock, and to provide a sampled output on a node. The SAL is to receive the sampled output on the node, and to sample the sampled output according to a second clock. The apparatus comprises a digital-to-analog converter (DAC) coupled to the node, wherein the DAC is to adjust a common mode of the sampled output according to a digital control to the DAC.