IBM has made a few analog chips like this [1]. If I remember correctly, one was even pulse time based, like neurons. https://research.ibm.com/blog/analog-ai-ch

IBM has made a few analog chips like this [1]. If I remember correctly, one was even pulse time based, like neurons. https://research.ibm.com/blog/analog-ai-chip-inference https://research.ibm.com/blog/analog-ai-chip-inference