Most general-purpose op amps can be used at any closed-loop gain. But this flexibility comes at a price: the unity-gain frequency has to be kept relatively low to prevent oscillation. For high ...

The first installment of this article series discussed the need to verify SPICE model accuracy and how to measure the open- and closed-loop small-signal AC output impedance of operational amplifier ...

With both switches closed, you once again measure the Vout voltage ... of the DUT (which proves the point about ignoring the auxiliary opamp). Figure 3: Op amp test loop for low-bandwidth DUTs This ...

the closed-loop dynamics. Unlike VFB amplifiers, CFB op amps don’t experience slew-rate limiting. R F alone will govern CFB transient response, as is the case with frequency response.

Texas Instruments has introduced what it claims is the first singe-chip digital input Class-D speaker amplifier with closed-loop feedback. Switching audio amplifiers dissipate far less heat than ...

In a typical application, the differential voltage is multiplied by the closed-loop gain of the op amp, which is determined by the external components. Over the years, better matching of ...