Filter is a useful signal can pass while the frequency of the unwanted signal suppression (or attenuation) of the electronic devices. Engineering used it as signal processing, data transmission and suppress interference. In the past the main passive components R, L and C composed of analog filters, since the sixties, integrated operational amplifier has enjoyed rapid development, and by its source filter R, C composition having no inductance, small size and weight light and so on. Furthermore, since the integrated operational amplifier open-loop voltage gain and input impedance are very high, and the output impedance is very low, but also by its active filter configuration also a certain amount of voltage amplification and buffer. Therefore, based on the amplifier and R, C active filter composed of increasingly widespread. With the development of microelectronics, it has been able to put some resistors and capacitors and integrated operational amplifier constituting Universal Active Filter (Universal Active Filter, UAF) on a single chip. This highly integrated chip, chip integration of the resistor and capacitor filter design required in the application of only very few external devices can easily constitute a source filter. UAF42 this general class of active filter BB (Burr-Brown) Corporation. It can be widely used in high-pass, low-pass and band-pass filter design. It uses a typical state variable (state-variable) analog structure, the internal integration of a reverse amplifier and two integrators. The plot includes 1000μF (± 5%) of the capacitor. Therefore, a better solution of the active filter design problem in obtaining a low loss (low-loss) capacitance.
UAF42 has the following characteristics:
● versatility, according to need to design a high pass, low pass, band pass and band-stop filter;
● design is simple. BB UAF42 company also designed a software, which can facilitate the flexibility to design a variety of different types of filters.
● high precision frequency and a high Q value;
● integrated on-chip capacitor 1000pF ± 5%.
Package included :
1 x UAF42 Universal Active Filter Adjustable Narrow Low /High Pass /Band Pass Filter
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