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EL4332C

Triple 2:1 300 MHz Mux-Amp AV =2

A Bandwidth Selectable Circuit

In Figure 5, a circuit is shown that allows three signals

to be either low pass filtered or full bandwidth.

This could be useful where an input signal is frequently

noisy. The component values shown

give a Butterworth LPF response, with a -3 dB fre-

quency of 50 MHz. Note again, the resistor values are

low, so that stray capacitance does not affect the desired

cut-off frequency.

Figure 5. Switched 50 MHz Low Pass Filter for High/Low Resolution Monitors