A new method of charge-to-digital conversion

A new method of charge-to-digital conversion based on the binary-weighted charge redistribution is presented in the paper. The proposed method takes advantage of a binary search algorithm similar to the other successive approximation schemes. The novelty of presented approach consists in a lack of a digital-to-analog converter, and more importantly, also in eliminating a clock that controls converter operation. The circuit diagram for the self-timed charge-to-digital conversion that implements the proposed method of charge redistribution is discussed in detail.