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.

Many applications require a sampling circuit whose output is inverted with regard to the respective sample of an input signal. A simple approach is a cascade of a common noninverting sample-and-hold ...

The output is trying to make the inverting input match the noninverting one, but it can’t because there is no connection. The output would like to provide an infinite amount of voltage, but it ...

Although the output voltage of an optoisolator curtails its usefulness, you can add discrete transistors to form an isolated amplifier. Figure 1 shows an example of a simple, 1-kV-p-p Class AB ...

2. The high-speed summing amplifier can sum as many as four input voltages without the need for an inverter to change the sign of the output. Figure 3 is the performance photo at 1 MHz.

Since the summing amp actually inverts the audio, we use the output of the second op-amp as the + output, essentially inverting the other output back into phase (and also giving us 6 dB more output ...