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m718
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In a filter where 1/4 watt resistors is enough would the filter be less noisy if I use 1/2 watt or more or should I use the least wattage resistors needed?
Which Wattage Resistor is Best for a Noiseless Filter Design?
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Discussion Overview
The discussion revolves around the selection of resistor wattage in the context of designing a noiseless filter. Participants explore the relationship between resistor wattage, noise levels, and resistor composition, considering both theoretical and practical implications.
Discussion Character
- Exploratory, Technical explanation, Debate/contested
Main Points Raised
- Some participants question whether using higher wattage resistors (e.g., 1/2 watt) would result in a noiseless filter compared to using the minimum required wattage (1/4 watt).
- One participant suggests that the size of the resistor does not generally affect its noise, but the construction type (carbon composition versus metal film) may play a role.
- A participant shares a link to an article discussing resistor noise and composition, indicating interest in further exploration of the topic.
- Another participant distinguishes between two common categories of resistors: composite and metal, noting that thermal noise may dominate at low current flows, while composite resistors can become noisy under current due to their construction.
- It is mentioned that metal resistors tend to remain quieter compared to composite resistors when current is applied.
Areas of Agreement / Disagreement
Participants express differing views on the impact of resistor wattage and composition on noise levels, indicating that multiple competing perspectives remain without a clear consensus.
Contextual Notes
Participants reference specific types of resistors and their characteristics, but the discussion does not resolve the implications of these factors on noise levels in filter designs.