Signal filters block or decrease (attenuate) unwanted frequencies or signal wave characteristics. There are several basic types of signal filters. Low pass filters block or attenuate signals at frequencies above a specified cutoff frequency. Conversely, high pass filters block or attenuate signals at frequencies below a specified cutoff frequency. Band pass filters block or attenuate signals at frequencies outside of the specified low pass and high pass cutoff frequencies. Often, these filters combine or cascade low pass and high pass filters. Band pass filters, which block a portion of the frequency spectrum, allow both lower and higher frequencies to pass. All pass filters, which can be used to introduce desired phase shifts in signals, allow all frequencies to pass. |
Products & Services Related to Signal Filters
Bridge Conditioners
Bridge conditioners are instruments that provide excitation and support for strain gages, Wheatstone bridges, load cells, and sensors. They also include circuitry for signal conditioning, amplification, and processing.
Charge Amplifiers and Charge Converters
Charge converters and charge amplifiers convert the charge output from a piezoelectric, capacitive or other charge-producing sensor to a signal such as analog voltage or current.
Data Acquisition
Data acquisition is the digitizing and processing of multiple sensor or signal inputs for the purpose of monitoring, analyzing and/or controlling systems and processes. Signal conditioning includes the amplification, filtering, converting, and other processes required to make sensor output suitable for rereading by computer boards.
Temperature Signal Conditioners
Temperature signal conditioners accept outputs from temperature measurement devices such as resistance temperature detectors (RTDs), thermocouples, and thermistors. They then filter, amplify, and/or convert these outputs to digital signals, or to levels suitable for digitization.
Voltage-to-Frequency Converters
Voltage-to-frequency converters accept a voltage signal and convert its analog level to a signal with a corresponding frequency.
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