Patent ID: 7324037

Claim:
An adaptive analog to digital (A/D) conversion device for converting an analog signal to a digital signal, comprising: a threshold generator, the threshold generator being capable of providing a first threshold signal and a second threshold signal; a comparator circuit coupled to the threshold generator, the comparator circuit being capable of comparing the analog signal with the first threshold signal and the second threshold signal and generating a digital magnitude signal, the comparator circuit also being capable of comparing the analog signal with a sign threshold signal and generating a digital sign signal; a counter coupled to the comparator circuit, the counter being capable of counting the digital magnitude signal within a predetermined period and generating an accumulation signal, the counter also being capable of comparing the accumulation signal with a percentage threshold signal and generating a bit signal; and an integrator coupled between the counter and the threshold generator, the integrator being capable of providing a control signal to the threshold generator in response to the bit signal from the counter and adjusting the first threshold signal and the second threshold signal.