People have done this on TI calculators (& likely other systems with similarly little shielding & sufficient clock rates). No hardware support needed—just cause some long enough trace (e.g. on the data bus) to oscillate at the correct frequency. Granted, a 6 MHz Z80 can pretty much only only do AM radio (& can only be picked up right next to the radio), but the principle is not new.
Not really. Unless it's possibly ECL digital logic, where the transistors are operated in a linear region. The 'analog parts' you speak of are run in saturated switching mode, i.e. not analog.
TI calculators (Score:2)
Digital logic (Score:1)
Is built from analog parts.
Re:Digital logic (Score:1)
Not really. Unless it's possibly ECL digital logic, where the transistors are operated in a linear region. The 'analog parts' you speak of are run in saturated switching mode, i.e. not analog.