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Analog Input Channels:
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This is the maximum number of analog channel inputs. The single-ended number is specified when single-ended inputs are available as twice the number of differential inputs. Differential channels use the difference between two signals as an input; common mode is filtered out. In some systems, differential inputs are combinations of two single-ended inputs. When this is the case, twice the number of differential channels are available as single-ended inputs.
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Search Logic:
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All matching products will have a value greater than or equal to the specified value.
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Differential Channels
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Differential channels have two inputs. The signal to process is the voltage (V) difference between the two inputs. For example, if one reading is 4.93 V and the other reading is 5.16 V, the meaningful value is the 0.23 V difference between the two. Often, this applies to precision measurements where the difference between two low voltage inputs is small but critical.
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Search Logic:
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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Filter Type:
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Your choices are...
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Low Pass
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Low pass filters block or attenuate signals at frequencies above the specified cutoff frequency.
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High Pass
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High pass filters block or attenuate signals at frequencies below the specified cutoff frequency.
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Band Pass
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Band pass filters block or attenuate signals at frequencies outside of the specified low pass and high pass cutoff frequencies. This is frequently done by combining or "cascading" low-pass and high-pass filters.
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Band Stop
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Band stop filters block a portion of the frequency spectrum, allowing lower and higher frequencies to pass.
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All Pass
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All-pass filters allow all frequencies to pass; they can be used to introduce desired phase shifts in signals.
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Other
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Unlisted or specialized form of filter.
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Search Logic:
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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.
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Filter Frequency Response:
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Your choices are...
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Bessel
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Bessel filters have a relatively flat passband and slow roll-off. The stopband is fairly monotonic (ripple-free). Among the filters with the most complex circuitry.
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Butterworth
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Butterworth filters provide a very flat response. There is almost no attenuation in the passband. The roll-off rate is somewhat slower than other filters.
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Cauer (Elliptic)
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Cauer or elliptic filters provide the fastest roll-off for a given order (number of poles). The pass band and stop band will typically have ripples.
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Chebyshev
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Chebyshev filters provide a very fast roll-off, but at the expense of a rippled pass band.
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Linear Phase
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Linear phase response filters preserve the phase characteristics of a signal by time-delaying the signal components equally.
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Other
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Search Logic:
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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.
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Filter Technology:
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Your choices are...
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Analog (RC)
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An analog filter is designed with resistors and capacitors. It is used for analog signals only and is often used in low-noise requirement applications.
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Digital (FIR, IIR)
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A digital filter is designed with solid state components and is used for digital signals and quantized signals from a sample-and-hold amplifier. This category includes Finite Impulse Response (FIR) and Infinite Impulse Response (IIR) filters. Digital filtering can approach ideal bandpass characteristics.
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Search Logic:
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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.
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Number of Poles:
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Poles are a measure of complexity of the filter circuitry. In general, more poles will provide a steeper roll-off for a given filter type.
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Your choices are...
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2
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4
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6
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8
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Other
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Search Logic:
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Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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High Pass Cutoff Frequency:
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Nominal frequency above which the input signal is passed and below which the signal is blocked.
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Search Logic:
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Low Pass Cutoff Frequency:
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Nominal frequency below which input signal is passed and above which the signal is blocked.
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Search Logic:
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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