Asynchronous capacitive SAR ADC based on Hopfield network

This letter revisits a Hopfield network for an SAR ADC configuration, which enables low voltage, power and fast operation with small circuitry. It employs asymmetrical to avoid local minimum, it uses capacitors switches instead of very large resistors. Our N-bit N chopper-type comparators asynchronous parallel operation, is different from the conventional employing only one comparator. requires sampling clock each input data sampling; no internal high frequency required. Its AD conversion time determined by comparator delays capacitor charge/discharge settling times; hence latency or two cycles. verified SPICE simulations.