Fig. 2: Unity-Gain Follower (Non-Inverting) With the invention of the transistor in 1947 (see our related Milestone article “The Transistor Portable Radio”), a parallel development program of tube and ...

Advantages When discrete transistors are used, the bias and operating point of the transistor interacts with the gain and tuning of the stage. When op amps are used, all the designer needs to do is ...

CMOS op amp schematic. Click to Enlarge Op amp symbol and configurations Figure 12. Op amp symbol and configurations: (a) inverting, (b) non-inverting and (c) unity gain buffer. Click to Enlarge In ...

Because the inverting input is at virtual ground, the output of the inverting op amp is V OUT = −IR2 = −V IN R2/R1. Thus, the gain of the inverting op-amp circuit is −R2/R1.

Non-inverting form: (Inputs reversed in Fig. 2) V IN connects to the amplifier non-inverting (+) input and V REF connects to the inverting (−) input. If V IN > V REF, the output goes high.