In a simple, accurate, reliable, stable and universal principles, use of a hierarchical design to match the idea of interconnection. The characteristics of the system is: through the analog switch to change the feedback resistor value, thus changing the amplifier gain, gain from 10dB to 60dB adjustable step to 10dB. With single-chip programmable filter AT89s52 of MAX262 chip to program, you can at the same time the input signal for two second-order low-pass, high pass, band-pass, band-stop and all-pass filter processing, filter center frequency in 15kHz ~ 50kHz frequency range of 64 to achieve adjustment program, the Q value in the range of 0.5 ~ 64 conditioning program to achieve 128.

可控放大器.doc

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