Wikipedia contributors. (2025, October 27). Bartolomeo Cristofori. In Wikipedia, The Free Encyclopedia. Retrieved 02:45, December 5, 2025, from https://en.wikipedia.org/w/index.php?title=Bartolomeo_Cristofori&oldid=1319051679
Inside the die of Intel’s 8087 coprocessor chip, root of modern floating point (righto.com) Looking inside the Intel 8087, an early floating point chip, I noticed an interesting feature on the die: the substrate bias generation circuit. In this article I explain how this circuit is implemented, using analog and digital circuitry to create a negative voltage.
Bartolomeo Cristofori (Wikipedia) Bartolomeo Cristofori di Francesco (Italian pronunciation: [bartoloˈmɛːo kriˈstɔːfori di franˈtʃesko]; May 4, 1655 – January 27, 1731) was an Italian maker of musical instruments famous for inventing the piano.