| 摘要 |
FIELD: physics. ^ SUBSTANCE: invention relates to electronics, specifically to active filters with compensation to reduce Q-enhancement. The filter (dwg 2) can include a first amplifier (202a) and a second amplifier (202b), connected to the first amplifier. The second amplifier has a negative feedback circuit, which includes (dwg 7) a buffer (702), which has several compensation resistors (RC2) and a capacitor (C2). Each of the compensation resistors has a nominal value which results in the biquad filter intrinsically having zero Q-enhancement. Biquads can be connected into a cascade to obtain higher order filters. ^ EFFECT: low Q-enhancement in the range of variation of the process, voltage and temperature. ^ 23 cl, 17 dwg |
