The most linear “digital-to-analog” converter is also one of the oldest. Lord Kelvin's KVD (Kelvin-Varley divider) is, in its most developed form, linear to 0.1 ppm. This manually switched device ...
High-precision, instrumentation-grade digital-to-analog conversion has undergone significant progress (see sidebar 'A history of digital-to-analog conversion'). Ten years ago, 12-bit DACs were premium ...