Difference between revisions of "RF Band Pass Filters"
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| + | A band pass filter (LPF) is used at the front end of a receiver, to attenuate strong out-of-band signals. | ||
| + | Strong signals that reach the receiver’s first mixer and/or RF pre-amplifier cross-modulate and produce | ||
| + | unwanted spurious responses at the receiver output | ||
| + | |||
== Design Details == | == Design Details == | ||
Revision as of 12:04, 28 September 2021
A band pass filter (LPF) is used at the front end of a receiver, to attenuate strong out-of-band signals. Strong signals that reach the receiver’s first mixer and/or RF pre-amplifier cross-modulate and produce unwanted spurious responses at the receiver output
Design Details
- Double-tuned circuit filter
- QRP Labs design - Commercially available at reasonable cost
- Based on The double-tuned Circuit: An experimenter's tutorial
Schematic
Parts
