Continuous-time delta-sigma ADC for a radio receiver...

Details Continuous-time delta-sigma ADC for a radio receiver... Continuous-time delta-sigma ADC for a radio receiver...

2007-07-10

2007-07-10

Jeanglaude, Jean Bruner (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S155000

Reexamination Certificate

active

11369045

ABSTRACT:
A Continuous-Time Delta-Sigma Analog-to-Digital Converter (CTΔΣADC) for a radio frequency (RF) receiver employing a 200 kHz IF realizes an optimal signal-to-noise ratio using a programmable resonator that is set to resonate at 200 kHz. The programmable resonator is operably coupled to receive both an analog input signal at a low IF of 200 kHz and an analog feedback signal. From the analog input signal and the analog feedback signal, the programmable resonator produces a resonate signal at the low IF, and provides the resonate signal to a quantizer. The quantizer produces a digital output having a digital value coarsely reflecting an amplitude of the analog input signal. The CTΔΣADC further includes at least one programmable digital-to-analog converter (DAC) operably coupled to receive the digital output and to convert the digital output into the analog feedback signal provided to the programmable resonator.

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