Linear transformation transistor-only high-order currentmode filters are presented in this Letter. Based on the systematic design procedure, we can realize high-order current-mode filters employing switched-current technique efficiently. Only two kinds of switched-current basic cells are needed in our design to obtain simple architectures. The fifth-order Chebychev lowpass filter is designed to...

Low supply voltages in modern CMOS technologies are expected to reduce the maximum resolution of analog to digital converters in voltage mode operation. This paper outlines the functionality and possibilities of switched current (SI) circuit techniques in medium accuracy DS modulators. Starting with the presentation of different kinds of switched current cells, this paper gives an overview abou...

A novel fourth-order voltage-mode switched-capacitor bandpass ∆Σ modulator, using direct-charge-transfer pseudo-N-path resonators, is described. This modulator is insensitive to component mismatches and finite opamp bandwidth, and is also less sensitive to finite opamp gain than previous bandpass ∆Σ data converters. It is therefore suitable for high-speed communications applications.

This application note, which is the first of a two-part series, explains the basics of different SMPS topologies. Applications of different topologies and their pros and cons are also discussed in detail. This application note will guide the user to select an appropriate topology for a given application, while providing useful information regarding selection of electrical and electronic compone...

The quest for increased integration, more features, and added flexibility – all under constant cost pressure – continually motivates the exploration of new avenues in power management. An area gaining significant industry attention today is the application of digital technology to power supply control. This topic attempts to clarify some of the mysteries of digital control for the practicing an...

INTRODUCTION This is the second in a series of application notes that define the fundamental behavior of MOSFETs, both as standalone devices and as switching devices implemented in a Switch Mode Power Supply (SMPS). The first application note (1) provided a basic description of the MOSFET and the terminology behind the device, including definitions and physical structure. This application note ...

Dither signals are commonly used in electronics for implementing different type of modulations in power converters, which represent a very interesting class of hybrid systems. It was recently shown that a nonsmooth dithered system can be approximated by an averaged system provided that the dither frequency is sufficiently high and that the amplitude distribution function of the dither is absolu...

The aim of this paper is to study the effect of EMI in Switched mode PWM Inverter fed AC drive. This Switched mode PWM Inverter has an inherent noise source. This noise is mitigated by a New Active Common Mode Electro Magnetic Interference Filter (ACEF) which is proposed for switched mode power supply applications. The proposed filter is based on current sensing and a compensation circuit which...

Low-dropout regulators, commonly known as LDOs, are used extensively in a wide variety of electronic applications across many different industries. An LDO is generally perceived as a simple and inexpensive way to regulate and control an output voltage that is delivered from a higher input voltage supply. However, cost and simplicity are not the only reason for their widespread use. In fact, tod...