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CMOS operational amplifier drive circuit

2015-01-04 17:51  
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CMOS operational amplifier drive circuit
Figure shows the CMOS operational amplifier drive circuit. As the output current of CMOS operational amplifier is generally small, a few blocks of CMOS operational amplifiers should be set in parallel for driving the LED, as shown in Figure (a) and Figure (b). Sometimes, a CMOS operational amplifier transistor can be added to extend the drive current, as shown in Figure (c). In the circuit shown in Figure (d), once driven, CMOS operational amplifier’s output voltage can be incurred by LED clamp around the UF.