Integrated circuit with tracking logic

Details Integrated circuit with tracking logic Integrated circuit with tracking logic

2008-05-30

2011-12-06

Ledynh, Bot (Department: 2858)

Electricity: measuring and testing

Magnetic

Calibration

C702S104000

Reexamination Certificate

active

08072208

ABSTRACT:
An integrated circuit including an amplifier and a first circuit. The amplifier is configured to receive a sensed signal and provide an amplified signal. The first circuit is configured to track a first signal that is based on the amplified signal. The first circuit includes a first comparator, tracking logic and a first digital to analog converter. The first comparator is configured to respond to a second signal that is based on the first signal and provide a comparator output signal. The tracking logic is configured to receive the comparator output signal and update a digital output. The first digital to analog converter is configured to receive the digital output and provide a tracking signal that is summed with the first signal to provide the second signal.

REFERENCES:
patent: 6279375 (2001-08-01), Draxelmayr
patent: 6297627 (2001-10-01), Towne et al.
patent: 6525531 (2003-02-01), Forrest et al.
patent: 2003/0225539 (2003-12-01), Motz et al.
Motz et al., A Chopped Hall Sensor With Small Jitter and Programmable “True Power-On” Function, Journal of Solid-State Circuits, vol. 40, No. 7, Jul. 2005, pp. 1533-1540.
Draxelmayr et al., A Self-Calibrating Hall Sensor IC With Direction Detection, Journal of Solid-State Circuits, vol. 38, No. 7, Jul. 2003, pp. 1207-1212.
Makinwa et al., Smart Sensor Design: The Art of Compensation and Cancellation, IEEE, 2007, pp. 76-82.

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