Eighth-Order Filter (CB6741E)

This low pass filter has attenuation of 5.5 dB and the frequencies depend on the values of the components in the case 1 kHz.

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Walk Talkie for 1 km (CB3826E)
This circuit using components that are still common in our market was found in a 1987...
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This circuit was obtained in a 1998 publication, but it can be easily assembled. The circuit...
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