Improved fully-differential analog filters
| Autor: | Ramon Pallas-Areny, M. Massarotto, Vittorio Ferrari, Oscar Casas |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Engineering
Frequency response business.industry law.invention Analogue filter Capacitor Common-mode rejection ratio Filter (video) Control theory law visual_art Electronic component Electronic engineering visual_art.visual_art_medium Electrical and Electronic Engineering Resistor business Instrumentation Voltage |
| Popis: | This paper proposes two novel design techniques that improve the performance of fully differential filters built by coupling two equal single-ended filters. These filters usually reach a high common-mode rejection ratio (CMRR) without using tightly matched passive components but may become unstable because of common-mode signals. Previously proposed techniques to solve these problems, based on resistor or capacitor T-networks, reduce the CMRR. The two techniques proposed overcome this tradeoff. The first technique improves the stability of the filter common-mode gain by adding damping resistors that do not modify the desired differential frequency response or the CMRR. The second technique, which is particularly valuable when a path for input bias currents must be provided, uses a resistor network to estimate the common-mode voltage of the input and uses it as common ground voltage for the filter. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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