Patent ID: 6940444

Claim:
A method for an asynchronous analog-to digital conversion of analog signals is comprising: (1) provide an asynchronous analog-to-digital converter, wherein the conversion range of the input voltage to be converted is between a maximum voltage Vdd 1 and a minimum voltage Vdd 2 , comprising a reference voltage Vref, n-blocks according to n bits of a digital output, wherein each block comprises a comparator comparing said reference voltage with a voltage Vx being correlated to said input voltage, an arrangement of capacitors having each a unity capacitance C, and a digital output vector a(n) having n bits; (2) start a sampling phase; (3) store a charge in each block wherein said charge Qs is correlated with the unity capacitance C and the analog input voltage; (4) start a measurement phase; (5) set a block counter N to the number of blocks; (6) set the bit a(N) of the digital output to low if the comparator of the nth block detects that said voltage Vx>Vref and set to high if Vx<Vref; (7) check if block counter N equals 1 and go then to step (10) else go to step (8); (8) calibrate all following blocks until the first block with value of a(N); (9) decrease block counter N by 1 and go to step (6); and (10) all bits of output are set.