![operational amplifier - Active low-pass filters --- good to what frequencies? - Electrical Engineering Stack Exchange operational amplifier - Active low-pass filters --- good to what frequencies? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/RlEDZ.png)
operational amplifier - Active low-pass filters --- good to what frequencies? - Electrical Engineering Stack Exchange
![ltspice - Active low pass filter with cut-off frequency ~4250 Hz lets a 20 kHz signal through - Electrical Engineering Stack Exchange ltspice - Active low pass filter with cut-off frequency ~4250 Hz lets a 20 kHz signal through - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/kN4J2.jpg)
ltspice - Active low pass filter with cut-off frequency ~4250 Hz lets a 20 kHz signal through - Electrical Engineering Stack Exchange
![operational amplifier - Op-amp first-order low-pass filters, capacitor placement in inverting circuit - Electrical Engineering Stack Exchange operational amplifier - Op-amp first-order low-pass filters, capacitor placement in inverting circuit - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/Cbjcb.png)
operational amplifier - Op-amp first-order low-pass filters, capacitor placement in inverting circuit - Electrical Engineering Stack Exchange
![analog - How does the capacitor C1 provide filtering in this second order active low pass filter? - Electrical Engineering Stack Exchange analog - How does the capacitor C1 provide filtering in this second order active low pass filter? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/g9mSD.jpg)