What's the state of the art in broadband DC-to-daylight (well, a few MHz, anyway) practical analog triangle-to-sine shapers?
Looks like the last discussion here was in 2017. Any new developments?
Here's a circuit someone posted as of April 2020:
Here's an array of lateral PNP diff-pairs, looks more suitable for as it says implementation on chip than anything discrete but idk.
Anyone know what the gist of this now gone-for-obv-reasons circuit was?