System and method for spread spectrum adc noise reduction

Abstract

Methods, systems, and apparatuses, including electrical circuits, are described for spread spectrum ADC noise reduction. An analog-to-digital converter may include an analog modulator to modulate an input analog signal according to a pseudo-noise sequence. An ADC core may convert the modulated analog input signal to a digital signal representation thereof. The digital signal may be demodulated using the pseudo-noise sequence to generate a noise-spread signal with reduced noise spectral density. The analog modulator and digital demodulator may also be configured in an analog-to-digital converter that includes a comparator and successive approximation register (SAR) logic, rather than an ADC core, in a SAR implementation. Multi-lane, interleaved analog-to-digital conversion circuits are also described using the inventive techniques. Analog-to-digital converters including DC offset components and methods performed according to the inventive techniques are also described.