Mitigating interference from switch-mode power supplies in sampling receivers

Application of sliding Mode Control to Switch-Mode Power supplies

Switch-mode power supplies represent a particular class of variable structure systems (VSS). Thus, they can take advantage of non-linear control techniques developed for this class of systems. In this paper the so called sliding mode control is reviewed and its application to switchmode power supplies is discussed. Sliding mode control extends the properties of hysteresis control to multi-varia...

Transformer Shielding Technique for Common Mode Noise Reduction in Switch Mode Power Supplies

Use of sigma-delta modulation to control EMI from switch-mode power supplies

Conducted electromagnetic interference (EMI) is a major cause of concern in switch-mode power supplies (SMPSs) which commonly use standard pulsewidth modulation (PWM). In this paper, Sigma–Delta ( ) modulation is proposed as an alternative switching technique to reduce conducted EMI from an SMPS. The result of using modulation is a spread in the spectrum of the conducted emissions so that large...

Use of Sigma-Delta Modulation to Control EM1 from Switch-mode Power Supplies

Conducted Electromagnetic Interference (EMI) is a major cause of concern in switchmode power supplies (SMPS) which commonly use standard pulsewidth modulation (PWM). In this paper, Sigma-Delta (CA) modulation is proposed as an alternative switching technique to reduce conducted EM1 from SMPS. The result of using EA modulation is a spread in the spectrum of the conducted emissions so that large ...

Electromagnetic Interference (EMI) in Power Supplies

Increasing power density, faster switching and higher currents forces designers to spend more time both considering the effects of electromagnetic interference (EMI) and debugging a design that has EMI problems but is otherwise complete. This paper explains the different types of EMI and their coupling mechanisms and the existing EMI regulations. The most frequent noise sources, transmission pa...