“…We omit citing these approaches, as they typically utilize basic back-propagation, and that topic has been covered extensively in the neural network literature [1286]. However, there are also a large variety of implementations for on-chip back-propagation in neuromorphic systems [217], [575], [623], [628]- [630], [633], [641]- [644], [646], [647], [650], [657]- [659], [661], [662], [671], [691]- [697], [721], [726]- [728], [730], [738], [741], [745], [746], [759], [764], [775], [778]- [780], [784], [786], [788]- [790], [793], [795], [796], [798]- [803], [840], [843], [857], [872], [877], [896],…”