Low-pass filter circuit with variable time constant

摘要: A low-pass filter circuit comprises a including series connection of first and second resistors having one end connected to an input terminal capacitor between the other ground, phase inverting amplifier connection, feed back output predetermined time constant, diode in parallel with resistor. The may be connected, cathode terminal, so that electric charge discharged. Alternatively, anode charged circuit. two diodes resistor, while terminal.