Patent ID: 7948413

Claim:
Method for analog-to-digital signal conversion with asynchronous Sigma-Delta modulation comprising modulation of an analog signal by means of an asynchronous Sigma-Delta modulator, counting periods of a reference clock during each pulse of a previously obtained square wave and making a digital word available, wherein the square wave (z(t)) obtained as a result of the modulation in the asynchronous Sigma-Delta modulator (ASDM) undergoes conversion by counting periods of the reference clock (RG) during subsequent pulses of the square wave (z(t)) using a counting module (CTM), and wherein subsequently, each digital word obtained representing the counted number of periods (T 0 ) of the reference clock (RG) during each given pulse of the square wave (z(t)) is recorded and stored in an intermediate buffer (TBUF), and at the same time, duration of serial transmission of a digital word obtained as a result of counting the periods (T 0 ) of the reference clock (RG) during the previous pulse of the square wave (z(t)) is controlled by a control module (CM), and as soon as this transmission is completed, content of the intermediate buffer (TBUF) is transferred to a transmitting buffer (TDR), and wherein subsequently, the given digital word representing the given pulse of the square wave (z(t)) is serially transmitted to a computer or to a communication network, and a cycle a described is repeated for the subsequent pulse of the square wave (z(t)).