Help with Active Filters specifications:
General Characteristics
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| Filter Type | |||
| Your choices are... | |||
| Low Pass | Low pass filters attenuate frequencies below a particular frequency called the cut-off frequency. Frequencies below the cut-off frequency pass easily through the filter | ||
| High Pass | High pass filters attenuate frequencies above a particular frequency called the cut-off frequency. Frequencies higher than the cut-off frequency pass easily through the filter. | ||
| Band Pass | Bandpass filters are used to attenuate frequencies above and below a range of frequencies called the bandwidth or passband of the filter. Any signal with a frequency within the bandpass range passes through the filter. Any signal with a frequency outside the bandpass is reduced. | ||
| Band Reject | Band reject filters (band stop filters, notch filters) are used to attenuate a range of frequencies and allow all other frequencies to pass. | ||
| Universal / Programmable | Universal filters can be configured by the user to function as a low pass, high pass, band pass, or band stop filter. | ||
| Other | Other unlisted filter types. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
| Filter Order | |||
| Your choices are... | |||
| 1st Order | |||
| 2nd Order | |||
| 3rd order | |||
| 4th Order | |||
| 5th Order | |||
| 6th Order | |||
| 7th Order | |||
| 8th Order | |||
| Other | Other unlisted orders. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
| Filter Characteristic | |||
| Your choices are... | |||
| Bessel | Bessel filters are active filters with a passband that maximizes the group delay at zero frequency, thus showing a constant group delay in the passband. Group delay is a measurement of the time it takes for a signal to move between two points in a network. A constant group delay in the passband of filters implies that for all signals with frequencies in the passband, the time delay will be the same. This fact is important in many applications, especially audio, video and radar applications. | ||
| Butterworth | Butterworth filters are designed so that the frequency response is flat in the passband. | ||
| Chebyshev | Chebyshev filters feature a very steep roll-off, but have ripples in the passband. | ||
| Elliptic | Elliptic filters (Cauer filters) exhibit equalized ripple in both the passband and the stopband. | ||
| Other | Other unlisted filter characteristics. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
| Applications | The industrial field in which the device will be used. | ||
| Your choices are... | |||
| General | Filters are suitable for general-purpose applications. | ||
| Audio/Video | Filters are designed for audio or video applications. | ||
| Automotive | Filters are designed for automotive applications. | ||
| Avionics | Filters are designed for avionics applications. | ||
| Commercial | Filters are designed for commercial applications. | ||
| Communications | Filters are designed for communications applications. | ||
| Computers | Filters are designed for computers. | ||
| Data Acquisition | Filters are designed for data acquisition applications. | ||
| EMI Filtering | Filters are designed for electromagnetic immunity (EMI) or electromagnetic compliance (EMC) filtering systems. | ||
| Industrial | Filters are designed for industrial applications. | ||
| Medical | Filters are designed for medical equipment and medical applications. | ||
| Military | Filters are designed for military applications. | ||
| Portable Devices | Filters are designed for portable devices such as portable digital assistants (PDA), digital cameras, and cell phones. | ||
| Ripple Attenuator | Filters are designed to trim or filter the ripple voltage produced at the output of AC-DC or DC-DC converters. | ||
| Other | Other unlisted applications. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
Standards and Certifications
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| RoHS Compliant | Restriction of Hazardous Substances (RoHS) is a European Union (EU) directive that requires all manufacturers of electronic and electrical equipment sold in Europe to demonstrate that their products contain only minimal levels of the following hazardous substances: lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyl and polybrominated diphenyl ether. RoHS will become effective on July 1, 2006. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
| ELV Directive | End of Life Vehicles (ELV) Directive required that certain automotive products be free (except for trace impurities) of mercury, cadmium and lead by July 1, 2003. Lead can still be used as an alloying additive in copper, steel and aluminum; and in solderable applications. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
| Other | Other unlisted, specialized, or proprietary standard or certifications. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||