In long life, high reliability systems, supplied power is provided only to essential circuitry. As a result many of the unpowered circuits may have voltages applied to in- puts and outputs without proper supply biasing. As part of any diligent system safety risk assessment, a question often arises; will the unpowered components be damaged, degraded, or impair circuit performance under these abnormal operating conditions? The purpose of this article is to provide advice for what lies within the pins of several common amplifiers used in these applications.
Linear Technology, amplifiers, PA