Logic Noise is an exploration of building raw synthesizers with CMOS logic chips. This session, we continue to abuse the 4069UB as an amplifier. We’ll turn the simple unity-gain buffer of last ...

For the bandpass, we’ll need to build up a quick highpass filter as well. Bonus! I claimed last time that the Sallen-Key lowpass would cover something like 80% of your filtering needs.

Microwave Filter Company, Inc. designs, develops, manufactures, and sells electronic filters for radio and microwave frequencies primarily in the United States. It manufactures RF filters and ...

The firm's products include XO, VCXO, TCXO, lowpass, highpass, diplexer, and bandstop. The company was founded in 1965 and is headquartered in Orlando, FL.