Abstract
The existing schemes of analog-to-information converter (AIC) typically employ analog circuitry. However, the analog modules tend to introduce non-linearity into the system. This paper presents a new scheme of AIC with a pre-quantized random demodulator (RD) which is dominated by digital technology for overcoming non-linearity. The analog multiplier is replaced by the amplitude-to-pulse converters to achieve the multiplication of input signals with pseudo-random sequence and the conversion of voltage amplitude to pulse width. Then, only all-digital modules such as counters and subtracters are required to complete the quantization, integration, and sampling for the analog-to-information conversion, which facilitates to greatly reduce the non-linearity. The experimental results demonstrate the accuracy improvement of the analog-to-information conversion by pre-quantized RD.