Latch device and operation method thereof

A latch device, comprising:

• a differential pair, receiving differential input signals;
• a differential circuit, including a pair of cross-coupled inverters, performing a logic operation on the differential input signals;
• and
• an offset cancellation circuitry, including at least one first offset cancellation circuit and at least one second offset cancellation circuit, wherein the at least one first offset cancellation circuit is coupled between a first connection node and a second connection node, and the at least one second offset cancellation circuit is coupled between the first connection node and a third connection node,
• wherein each of the at least one first offset cancellation circuit and the at least one second offset cancellation circuit comprises:
• a first reference-independent circuit, controlling a first electrical path between the first connection node and one of the second connection node and the third connection node according to an offset control bit;
• and
• a first reference-dependent circuit, controlling a second electrical path between the first connection node and the one of the second connection node and the third connection node according to the offset control bit and a first control signal, wherein the first control signal is determined according to a comparison of a voltage level of one of the differential input signals to a first threshold value.

An operation method of a latch device, comprising:

• receiving, by a differential pair of the latch device, differential input signals;
• controlling, by a first reference-independent circuit included in a clock gate circuit of the latch device, a first electrical path between a power supply node and a first connection node according to a clock signal;
• and
• controlling, by a first reference-dependent circuit included in the clock gate circuit of the latch device, a second electrical path between the power supply node and the first connection node according to the clock signal and a first control signal, wherein the first control signal is determined according to a comparison of a voltage level of one of the differential input signals to a first threshold value.