A 1-bit DAC as employed for the purpose is shown in Figure 14(a) and its exemplary output is depicted in Figure 14(b).
Caption: Figure 14: (a) 1-bit DAC and (b) output response.
So, Figure 1 presents a MEMS accelerometer-based 4th-order Sigma-Delta modulator, where the 2nd-order digital integrator H(z) is inserted between AFE and 1-bit comparator; [K.sub.1] is the quantizer gain; [Q.sub.1] is the quantization noise of 1-bit quantizer, and [K.sub.2] is the equivalent linear model of 1-bit DAC
If the period at which the 1-bit DAC
pin changes value is [T.sub.LVPECL_CLK_] then the pulse corresponding to one period duration starting at time [T.sub.o] can be represented as below.
The question that's been dogging my CD player reviews is whether 1-bit DACs
are inherently inferior to multi-bit units, or whether I've just been unlucky (or hearing things).