Solutions Search - High Output Current Amplifiers

Simple Bidirectional DC Motor Speed Controller Without a Tachometer

Feb 13th 2001
For motor speed control without using a tachometer, the circuit in Figure 12 shows an approach. Using the enable feature of the LT1970A, the drive to the motor can be removed periodically. With no drive applied, the spinning motor presents a back EMF voltage proportional to its rotational speed. The LT1782 is a tiny rail-to-rail ...

Simple Bidirectional DC Motor Speed Controller

Feb 13th 2001
The LT1970 is a ±500mA power op amp with precise externally controlled current limiting. Separate control voltages program the sourcing and sinking current limit sense thresholds with 2% accuracy. Output current may be boosted by adding external power transistors. ...

Using All four Amplifiers of the LT1397 to Drive Large zCapacitive Loads

Jan 10th 1999
Four paralleled amplifiers increase load capacitor current drive capability. A small ballast resistor at each output increases isolates the effects of each amplifier's different output offset. ...