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Low Pass Active Filter

The low pass filter shown in Fig.4 has a DC gain of (-R2/R1) and the –3dB corner frequency is 1/2πR2C. Make

sure the filter is within the bandwidth of the amplifier. The Large values of feedback resistors can couple with

parasitic capacitance and cause undesired effects such as ringing or oscillation in high-speed amplifiers. Keep

resistors value as low as possible and consistent with output loading consideration.

Fig. 4. Low Pass Active Filter

Driving Video

The

805X can be used in video applications like in Fig.5.

Fig. 5. Typical Video Driving

8051/2/3/4