Self-calibrating delay line flash ADC and tracking circuitry

A method apparatus comprising:

• receiving an analog voltage;
• via a signal generator circuit, producing control signals to control operation of delay line analog-to-digital converter circuitry based upon the analog voltage received by the signal generator circuit, the control signals including a first control signal and a second control signal supplied to the delay line analog-to-digital converter circuitry, a magnitude of a time duration between the first control signal and the second control signal depending on a magnitude of the received analog voltage, the delay line analog-to-digital converter circuitry operative to convert samples of the analog voltage into a digital signal;
• and
• calibrating the signal generator circuit based on calibration feedback generated via conversion of the samples of the analog voltage into digital signals via the delay line analog-to-digital converter circuitry.

An apparatus comprising:

• a delay line analog-to-digital converter operable to convert an analog error voltage into a digital error voltage signal based on a first control signal and a second control signal supplied to the delay line analog-to-digital converter, a magnitude of a time duration between the first control signal and the second control signal depending on a magnitude of the analog error voltage;
• an integrator function operable to produce a digital value representative of an analog input voltage, the digital value adjusted based on samples of the digital error voltage signal generated by the delay line analog-to-digital converter;
• and
• a digital-to-analog converter operative to convert the digital value received from the integrator function into a second analog voltage, the analog error voltage being a difference between the input voltage and the second analog voltage.