Patent ID: 8575984

Claim:
A multistage latch-based isolation cell, comprising: a latch having a first input port configured to receive a first binary signal, a first enable port configured to receive an enable signal, and a first output port configured to supply a second binary signal with a value equal to a previous value of the first binary signal; a delay device having a second input port configured to receive the enable signal and a second output port configured to supply the enable signal with a delay to yield a delayed enable signal, wherein a value of the delayed enable signal on the second output port becomes equal to a value of the enable signal on the second input port after a delay period of the delay device; and a reset latch having a third input port configured to receive the second binary signal, a second enable port configured to receive the delayed enable signal, a first reset port configured to receive a reset pulse, and a third output port configured to supply a third binary signal having a value equal to a first value of the first binary signal in response to the reset latch receiving the reset pulse, followed by the delayed enable signal with a first polarity value, followed by the second binary signal.