biff44
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1/f noise
Was doing my morning reading of various emails and magazines I came across this Analog Devices chopper op-amp. The claim to fame is :"This architecture enables temperature drift suppression to 20 nanovolts per °C (typ) and eliminates 1/f noise. "
https://www.analog.com/en/amplifier...ils_Lowest-Power_Zero-Drift_Op_Amp/press.html
Anyone familiar with why there would be no 1/f noise in a chopper op amp? What is the mechanism?
Why I ask is, can we apply the same architecture, somehow, to microwave oscillators and eliminate their 1/f noise? Before you laugh, we already have class E microwave amplifiers, which are basically "chopper" or "digital sampling" amplifiers. Why not an oscillator too?
Rich
Was doing my morning reading of various emails and magazines I came across this Analog Devices chopper op-amp. The claim to fame is :"This architecture enables temperature drift suppression to 20 nanovolts per °C (typ) and eliminates 1/f noise. "
https://www.analog.com/en/amplifier...ils_Lowest-Power_Zero-Drift_Op_Amp/press.html
Anyone familiar with why there would be no 1/f noise in a chopper op amp? What is the mechanism?
Why I ask is, can we apply the same architecture, somehow, to microwave oscillators and eliminate their 1/f noise? Before you laugh, we already have class E microwave amplifiers, which are basically "chopper" or "digital sampling" amplifiers. Why not an oscillator too?
Rich
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