A Novel Differential Log-Companding Amplifier for Biosignal Sensing

Table 2

Performance comparison with other works.

	This work	[11]	[4]	[8]
Technology	0.18 μm CMOS	0.18 μm CMOS	0.25 μm CMOS	—
Topology	Current mode	Current mode	Current mode	Current mode
Supply voltage (V)	0.8	1	0.6	1
Open gain (dB)	50 dB	44.5/50/55.9	−40 to 38	−40 to +40
Bandwidth (Hz)	510 k	0.3~1 k~10 k	200 k	—
Input referred noise density (fA/sqrt (Hz))	166.1 fA (@10 kHz)	153 fA (@10 kHz)	—	—
Maximum input current (nApp)	20	20	—	—
Input dynamic range (dB)	92.9	53.29	—	—
Power consumption (μW)	6	13	3.16	25
CMRR (dB)	74	—	35.76	—
THD@maximum input (%)	0.0287@50 dB	1.03	0.55	0.6