WIDEBAND TWO-POLE HIGH-PASS FILTER The circuit provides a 10MHz cutoff frequency. Resistor R3 ensures that the input capacitance of the amplifier does not interact with the filter response at the frequency of interest. An equivalent low pass filter is similarl ... read more>>
4.5 MHZ NOTCH FILTER Component value sensitivity is extremely critical, as are temperature coefficients and matching of the components. Best performance is attained when perfectly matched components are used and when the gain of the amplifier is ... read more>>
300-3400 HZ SECOND ORDER SPEECH FILTER Using two op amps, this filter is designed for second-order response. It has a bandpass of 300 to 3400 Hz, for applications in speech or telephone work.Schematic of 300-3400 HZ Second Order Speech Filter ... read more>>
