A Novel Scan Architecture for Low Power Scan-Based Testing

Table 4

Comparison of propagation delay overhead.

	Proposed scan cell		FLS scan cell		Partial MUX gating scan cell		NOR gating scan cell		Modified scan cell
	Ave. propa. delay (S)	% imp.	Ave. propa. delay (S)	% imp.	Ave. propa. delay (S)	% imp.	Ave. propa. Delay (S)	% imp.	Ave. propa. delay (S)	% imp.
SI to shift output (shift delay)
DI to shift output (capture delay)
DI to (launch delay)
CLK to shift output
CLK to (launch) output