Dual DAC CTSD | Wider Bandwidth and Higher SNR — Part 1
Introduction Consider our usual continuous-time sigma-delta (CTSD) ADC: x(t) is the analog input and y[n] is the digital output and feedback signal that drives the DAC. H(s) is the loop filter and Q represents the quantizer. One of the main difficulties with continuous-time sigma-delta’s is that when the digital output does not match the analog […]