ABSTRACT
In medical electronics, there is a diversity of high amplitude sources of wide frequency range in proximity to sensitive receiving devices. The principle interference problems are currents conducted out the power and magnetic fields. There are many high energy sources found in a medical environment. The most notorious is the Electro Surgical Unit (ESU), which generates fierce broad band noise from about 100 kHz to as high as 100 MHz. Electromechanical and Radio Frequencies (RF) generators usually do not need high quality Alternate Currrent (AC) power. Provide them with a separate power source, one with adequate reserves to cope with starting transients. Typically, ultrasound units generate high frequency Megahertz (MHz) range acoustic waves, and are looking for a very low level echo. Increasingly found in the hospital environment, telemetry operates on either of three bands (approximately 160MHz, 460MHz, and 900MHz).
