All digital ADC with linearity correction and temperature compensation

While digital circuits benefit from high-density digital CMOS technology, the design of analog and mixed signal blocks in the same technology is a higher challenge at each new technology node. AD converters are an example of such blocks. A possible solution is the implementation of ADCs in digital technology using logic gates as a voltage controlled oscillator. However, the limited linearity and temperature sensitivity are known issues. In this paper, a linearity correction technique that is also able to compensate for temperature effects is used. Results indicate the feasibility of the approach.