THS3091 Datasheet, PDF (32/45 Pages) Texas Instruments – HIGH-VOLTAGE, LOW-DISTORTION, CURRENT-FEEDBACK OPERATIONAL AMPLIFIERS

THS3091, THS3095
SLOS423H – SEPTEMBER 2003 – REVISED DECEMBER 2015
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Application Information (continued)
Figure 70 shows a push-pull FET driver circuit typical of ultrasound applications with isolation resistors to isolate
the gate capacitance from the amplifier.
V_S
V_S
+
5.11 Ω
_
−V_S
866 Ω
191 Ω
866 Ω
V_S
_
5.11 Ω
+
−V_S
−V_S
Figure 70. PowerFET Drive Circuit
8.2 Typical Application
The fundamental concept of load sharing is to drive a load using two or more of the same operational amplifiers.
Each amplifier is driven by the same source. Figure 71 shows two THS3091 amplifiers sharing the same load.
This concept effectively reduces the curernt load of each amplifier by 1/N, where N is the number of amplifiers.
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