TABLE 4. Blood Oxygen Saturation Devices Implemented Using CMOS in Research.

	[42]	[44]	[45]	[46]	[47]	[48]	[49]	[51]
Technology ()	0.35	0.18	0.18	0.18	0.13	0.18	0.18	0.35
Supply Voltage (V)	3.3	1.8	1.2	3.3/1.8	1.5	2.5	3.3/1.8	2–3.7
Oximeter Type	Transmission	Transmission	Reflective	Reflective	Reflective	Reflective	Reflective	Reflective
Sampling Frequency (Hz)	100	165	4	0.5,1,2,4	100	100	40	Continuous
LED Bias Current (mA)	7.1	25.6	0.036	0.0033	50	50	9.43	3 mW
Size (mm2)	1.265	1.84	10	8.45	10c	2.25c	20	0.64
Power Dissipation () a	363	216b	171b		68.7b	180	4.6b	14.85
LED Duty Cycle (%)	4	0.7	0.0125	N/A	20	25	0.07	Continuous

^aLED Power is excluded.

^bADC power is included.

^cEstimated value.