The Electrical Engineering Handbook

4

Active Filters

Rolf Schaumann,     Department of Electrical and Computer Engineering, Portland State University, Portland, Oregon, USA

4.1. Introduction

4.2. Realization Methods........

4.2.1. Cascade Design

4.2.2. Realization of Ladder Simulations

4.2.3. Transconductance-C (OTA-C) Filters

References.........

4.1 Introduction

Electrical filters are circuits designed to shape the magnitude and/or phase spectrum of an input signal to generate a desired response at the output. Thus, a frequency range can be defined as the passband where the input signal should be transmitted through the filter undistorted and unattenuated (or possibly amplified); stopbands require transmission to be blocked or the signal to be at least highly attenuated. ...