Patent ID: 9455733
Filing Date: 2016-09-27
CPC Classification: H03M,H04L

Claim Text:
1. An analog-to-digital conversion circuit that comprises: an analog modulator configured to receive and modulate an input analog signal according to a pseudo-noise (PN) sequence; an analog-to-digital converter (ADC) core that includes a first analog input, a second analog input, and a digital output, the ADC core being configured to differentially receive the modulated input analog signal on the first and second analog inputs, and to convert the modulated input analog signal to a digital signal generated on the digital output; and a digital demodulator configured to receive and demodulate the digital signal according to the PN sequence to generate a noise-spread signal; wherein at least one of: the analog modulator modulates the input analog signal based on a plurality of switches controlled by the PN sequence; or the analog-to-digital conversion circuit removes a direct current (DC) offset from the digital signal on the digital output.