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Analog circuits have a range of voltages, rather than just two as in digital logic.

2 votes

Choosing the best FM demodulation technique

The standard technique these days is to use a PLL. You could use an IC which does everything for you, or (at that relatively low carrier frequency) you could build your own VCO and use a 74HC series …
Chromatix's user avatar
  • 798
1 vote

Cable based data transmission without common ground

The most common way of doing this today is not using a copper wire, but an optical fibre. This eliminates the need for a common electrical potential (or the complementary signal on a differential pai …
Chromatix's user avatar
  • 798