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Analog Devices "RFI Rectification Concepts" MT-096
Posted: Fri May 18, 2018 7:56 am
by mediatechnology
A well-known but poorly understood phenomenon in analog integrated circuits is RFI rectification, specifically as it occurs in op amps and in-amps. While amplifying very small signals these devices can rectify large-amplitude, out-of-band HF signals, i.e., RFI.
http://www.analog.com/media/en/training ... MT-096.pdf
Re: Analog Devices "RFI Rectification Concepts" MT-096
Posted: Fri May 18, 2018 8:42 am
by JR.
well known but poorly understood...
JR
"Emitter followers as Colpitts oscillators," John Dunn, EDN, July 24, 2012.
Posted: Fri May 18, 2018 9:47 am
by mediatechnology
Every follower is just one inductance away from being a Colpitts oscillator.
This is another gem I just found.
"Emitter followers as Colpitts oscillators," John Dunn, EDN, July 24, 2012.
https://www.edn.com/electronics-blogs/l ... cillators-
Base stopper resistors as a Q-reducer is a nice explanation. Even if an emitter follower is not an oscillator they may resonate out-of-band and rectify more efficiently.