Lutz von Wangenheim

8 Questions 420 Answers 0 Followers

Questions related from Lutz von Wangenheim

The "Double-Integrator Oscillator (DIO)" - why does it oscillate?

The "Double-Integrator-Oscillator (DIO)" cannot fulfill Barkhausen´s loop gain criterion for oscillation. In a short paper I have explained why this circuit nonetheless is able to oscillate at the...

30 June 2020 1,043 7 View

Where is the "critical point" in the Nyquist plot?

I must admit that my question is a bit "provocative" because I know the answers. Yes, unfortunately, it seems that there are two possible answers. An engineer educated in control systems most...

01 February 2016 1,564 21 View

Does the Barkhausen criterion for oscillation apply for linear circuits only?

In several documents it is claimed that Barkhausens (necessary) criterion for a feedback circuit to oscillate applies to linear active circuits only...

17 August 2015 6,018 49 View

What is the difference between CFA and CFOA?

This is not a pure technical question but - more or less - a question when and how these shortcuts are commonly used. I know the meaning behind CFOA - Current Feedback Operational Amplifier. And I...

30 January 2015 5,510 13 View

How can we explain Antoniou`s GIC circuit?

The generalized impedance converter (GIC) topology introduced by A. Antoniou is known to be a very versatile functional block for realizing active filters and oscillators. My question is: How can...

13 November 2013 738 58 View

Are there self-sustaining oscillator effects outside of the field of electronics?

Inspired by * Erik Lindberg´s recent contribution (The oscillator - principle of nature), and * a discussion in RG about analogy between electrical and other technical systems I wonder if there...

07 October 2013 2,555 13 View

Are all harmonic oscillator circuits non-linear?

I must admit that my question sounds purposely a little provocative. But I accidentally came across the circuit described below, which exclusively works in the linear part of its operational...

01 January 1970 8,894 8 View

Are all harmonic oscillator circuits non-linear?

I must admit that my question sounds purposely a little provocative. But I accidentally came across the circuit described below, which exclusively works in the linear part of its operational...

01 January 1970 7,746 3 View