Table 3.

Comparison data of the amplifier performance enhancement for the previous and present ultrasound studies.

	[19]	[20]	[21]	[48]	Our Work
Class Mode	Class-AB	Class-DE	Class-D	Class-AB	Class-B
Operating Frequency	1 MHz	1.01 MHz	10 kHz	6.5 MHz	15 MHz
Output Voltage	180 Vpp	-	-	90 Vpp	126 Vpp
Output Power	-	0.8 W	2 kW	-	-
HD2	−61.28 dB	-	-	−45 dB	−67.17 dB
HD3	−56.17 dB	−16.4 dB	-	-	−44.63 dB
HD4	-	-	-	-	−60.75 dB