Near field inductive coupled tuning technique for RF bandpass ΣΔ modulators

A simple and fast wireless technique for accurate tuning of the resonators in high speed bandpass sigma delta modulators (BPSDMs) is presented. A commercially available antenna is employed to detect the radiation of on-chip resonators in the oscillation mode. The antenna is used for the calibration of the resonators at first. After adjusting the tuned frequency of resonators, it is reused as the front-end part of an RF receiver. The proposed architecture accelerates and simplifies the tuning process. Moreover, an extra oscilloscope for storing and post processing of demultiplexed data, which is typically used in GHz applications, is not required. Distinguishing between multi signal tones and disturbing tones in the spectrum is easier compared to conventional approaches.