ESD protectBRIEF ESD Protection Audio Input and Output Lines Background Electronic systems are sensitive to both external and internal sources of overvoltage transients. This can be in the form of external ElectroStatic Discharge (ESD) or internally generated Electrical Fast Transients (EFT). The purpose of this application brief is to detail Audio port protection. created by the electronic system. Sources include switching high current loads (such as the fly back transformer), pump lasers or other harsh environments. The EFT can be introduced via the power supply or inductively coupled onto a signal line. Regardless of the method of introduction, the results may be soft or hard failures similar to ESD failures. TECH The Problem Externally generated ESD pulses are introduced through the Audio jacks……