+V

S

5.11 W

R

F

2R

G

+V

S

+V

S

5.11 W

R

F

1nF

+V

S

R

G

24.9 W

+V

S

5.11 W

R

F

R

G

24.9 W

+V

S

5.11 W

R

F

THS3122, THS3125

www.ti.com

SLOS382E – SEPTEMBER 2001 – REVISED MAY 2015

Application Information (continued)

Figure 46 shows a configuration that uses two amplifiers in parallel to double the output drive current to larger

capacitive loads. This technique is used when more output current is needed to charge and discharge the load

faster as when driving large FET transistors.

Figure 46. Parallel Amplifiers For Higher Output Drive

Figure 47 shows a push-pull FET driver circuit typical of ultrasound applications with isolation resistors to isolate

the gate capacitance from the amplifier.

Figure 47. Powerfet Drive Circuit

Copyright © 2001–2015, Texas Instruments Incorporated

Submit Documentation Feedback

21

Product Folder Links: THS3122 THS3125