Low-pass filter

  
This circuit is useful where fast signal acquisition and high precision are required, as in electronic scales. The filter's time constant is set by the 2 ohm resistor and the 1 µ capacitor until comparator No. 1 switches. The time constant is then set by the 1.5 ohm resistor and the 1 jtF capacitor. Comparator No. 2 provides a quick reset.
Low-pass filter - schematic

The circuit settles to a final value three times as fast as a simple 1.5 ohm—1 µ¥ filter, with almost no dc error.




Leave Comment

characters left:

New Circuits

.