IC analog debugging and calibration thereof

Details IC analog debugging and calibration thereof IC analog debugging and calibration thereof

2007-04-10

2007-04-10

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Calibration or correction system

Signal frequency or phase correction

Reexamination Certificate

active

10830881

ABSTRACT:
An analog debugging block of an integrated circuit includes a multiplexor, a buffer, and a voltage-controlled oscillator. An analog voltage signal-of-interest is selectively passed through the multiplexor to the buffer. The buffer outputs an analog control voltage dependent on the selected analog voltage signal-of-interest. The analog control voltage serves as an input to the voltage-controlled oscillator and is used to control a frequency of a digital output signal generated from the voltage-controlled oscillator. The digital output signal from the voltage-controlled oscillator is driven off-chip, whereupon a frequency of the digital output signal is determined and compared against a collection of known frequencies that correspond to particular known voltages of the analog voltage signal-of-interest, thereby resulting in a determination of the value of the selected analog voltage signal-of-interest.

REFERENCES:
patent: 6111533 (2000-08-01), Yuan et al.
patent: 6969652 (2005-11-01), Knoedgen
patent: 2001/0020875 (2001-09-01), Jansson
patent: 2002/0060638 (2002-05-01), Nishii et al.

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