Texas Instruments Corporation

Charls Babu

Himanshu Varshney

Visvesvaraya Appala Pentakota

Jagannathan Venkataraman

Eeshan Miglani

Nagarajan Viswanathan

Viswanathan Nagarajan

Narasimhan Rajagopal

Vinam Arora

Srinivas Kumar Naru

Shagun Dusad

Neeraj Shrivastava

Aravind Ganesan

Srinivas Kumar Reddy Naru

Ani Xavier

Prasanth K

Chirag Chandrahas Shetty

Nithin Gopinath

Rakesh Chikkanayakanahalli Manjunath

Harshit Moondra

Shivam Srivastava

Abhishek Agrawal

Aditya Kumar

In an example, a system includes an input channel and a voltage to delay converter (V2D) coupled to the input channel. The system also includes a first multiplexer coupled to the V2D and an analog-to-digital converter (ADC) coupled to the first multiplexer. The system includes a second multiplexer coupled to the input channel and an auxiliary ADC coupled to the second multiplexer. The system includes calibration circuitry coupled to an output of the auxiliary ADC, where the calibration circuitry is configured to correct a non-linearity in a signal provided by the input channel. The calibration circuitry is also configured to determine the non-linearity of the signal provided to the ADC relative to the signal provided to the auxiliary ADC.

Auxiliary ADC-based calibration for non-linearity correction of ADC

In described examples, an analog to digital converter (ADC), having an input operable to receive an analog signal and an output operable to output a digital representation of the analog signal, includes a voltage to delay (VD) block. The VD block is coupled to the input of the ADC and generates a delay signal responsive to a calibration signal. A backend ADC is coupled to the VD block, and receives the delay signal. The backend ADC having multiple stages including a first stage. A calibration engine is coupled to the multiple stages and the VD block. The calibration engine measures an error count of the first stage and stores a delay value of the first stage for which the error count is minimum.

Calibration scheme for a non-linear ADC

In described examples, a circuit includes a calibration engine. The calibration engine generates multiple input codes. A digital to analog converter (DAC) is coupled to the calibration engine, and generates a first calibration signal in response to a first input code of the multiple input codes. An analog to digital converter (ADC) is coupled to the DAC, and generates multiple raw codes responsive to the first calibration signal. A storage circuit is coupled to the ADC and stores a first output code corresponding to the first input code. The first output code is obtained using the multiple raw codes generated by the ADC.

Calibration scheme for filling lookup table in an ADC

A signal transmission system includes an equalization filter configured to filter an input signal based at least in part on a feedback signal, a slicer configured to generate data based on the filtered input signal at a plurality of different phases, a synchronizer configured to compute a phase delay between the input signal at each of the different phases and the data, and a pattern generator configured to generate the feedback signal at a phase adjusted by the phase delay.

Signal transmission system for use with eye diagram monitor

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Charls Babu