2results about How to "Reduce clock cycles" patented technology

The application provides a high-speed random number generator based on a conservative chaotic system and a generation method thereof. The generated random number is subjected to two commonly used random number test standards, namely, a test suite NIST SP800-22 of The National Institute of Standards and Technology and another test suite TestU01, and experimental test results can prove that the generated random bit sequence passes the randomness test. The throughput of the high-speed random number generator can reach 19 Gbps.

The present application relates to a kind of adaptive adjustment method of quantization precision in HDR imaging process in the field of image sensor and its analog-digital converter.The adaptive adjustment method of quantization precision includes: the analog voltage signal of quantization light intensity size is amplified, and after being compared with multiple sequentially increasing threshold voltages one by one, thermometer code is formed, the most significant bit of thermometer code is set as mode control signal, according to mode control signal 1 or 0, corresponding oversampling rate is selected to carry out ΔΣ quantization to amplified analog voltage signal, form bit stream signal, and be converted into the fine quantization code value corresponding to the bit width of oversampling rate.The present application forms the most significant bit of thermometer code based on the analog voltage signal of quantization light intensity size, and the quantization precision is adaptively adjusted, and corresponding precision quantization is carried out by distinguishing high exposure overexposure pixel and low exposure effective pixel, realizes the dynamic adjustment of quantization bit width and oversampling rate.