Texas Instruments Corporation

Srikanth Vellore Avadhanam Ramamurthy

Jerry Doorenbos

Keith Eric Sanborn

Mina Raymond Naguib Nashed

Dwight David Griffin

Dimitar Trifonov

Tony Ray Larson

In some examples, a sigma-delta analog-to-digital converter (ADC), comprises a first set of switches configured to receive a first voltage signal; a second set of switches coupled to the first set of switches at a first node and a second node, the second set of switches configured to receive a second voltage signal; an integrator including a first input sampling capacitor coupled to the first node and a second input sampling capacitor coupled to the second node, wherein the integrator configured to generate a first output signal. The sigma-delta ADC further comprises a comparator coupled to the integrator and configured to generate a second output signal based on the first output signal; and a controller unit having a first counter, a second counter, and a processor, the controller unit coupled to the first and second sets of switches, the integrator, and the comparator.

Temperature sensing with bandgap sensor input to sigma-delta ADC

Sigma-delta analog-to-digital converter with multiple counters

A first-order sigma-delta analog-to-digital converter includes an input terminal, an integrator circuit, a comparator, and control circuitry. The input terminal is configured to receive a unipolar input signal to be digitized. The integrator circuit is coupled to the input terminal. The comparator is coupled to an output of the integrator circuit. The control circuitry is coupled to the integrator circuit and the comparator. The control circuitry is configured to equalize time that an output signal generated by the integrator circuit is greater than zero and time that the output signal generated by the integrator circuit is less than zero during digitization of the unipolar input signal.

First-order sigma-delta analog-to-digital converter

Multiplier circuitry includes first multiplier circuit including a first transistor having an emitter coupled to a first conductor, a base coupled to a second conductor, and a collector coupled to a third conductor, a second transistor having an emitter coupled to the first conductor, a base coupled to a fourth conductor, and a collector coupled to a fifth conductor, a third transistor having an emitter coupled to the second conductor and a base and collector coupled to a supply voltage, and a fourth transistor having an emitter coupled to the fourth conductor and a base and collector coupled to the supply voltage. Chopper includes a first switch to provide a chopped differential signal between the second and fourth conductors and a second switch for un-chopping a first differential output signal produced between the third and fifth conductors to provide an un-chopped differential output signal between the third and fifth conductors.

Analog multiplier and method for current shunt power measurements

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Tucson, AZ, United States of America

Srikanth Vellore Avadhanam Ramamurthy