Quadrature signal decoding using a driver
AssigneeSTMicroelectronics International N.V.
InventorsRanajay Mallik, Munish Mangal
Life of this patent
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Abstract
A system and method for decoding quadrature signals includes a quadrature signal generator, a quadrature signal decoder, a key matrix and a driver. The quadrature signal generator generates quadrature signals on rotation. The quadrature signal decoder is configured to convert the quadrature signals into non-overlapping signals. The key matrix is configured to receive the non-overlapping signals. The driver is configured to scan the key matrix to decode the non-overlapping signals to generate an event update corresponding to a direction of rotation of the quadrature signal generator.
Claims20
A system comprising:
- a quadrature signal generator operative to generate quadrature signals on rotation;
- a quadrature signal decoder operative to convert the quadrature signals into non-overlapping signals;
- a key matrix operative to receive the non-overlapping signals;
- and
- a driver coupled to the key matrix and operative to decode the non-overlapping signals and generate an event update corresponding to a direction of rotation of the quadrature signal generator,
- wherein the quadrature signal generator is selected from a group of an incremental rotary encoder, an optical tachometer, and a hall effect sensor.
A system comprising:
- a quadrature signal generator operative to generate quadrature signals on rotation;
- a quadrature signal decoder operative to convert the quadrature signals into non-overlapping signals;
- a key matrix operative to receive the non-overlapping signals;
- and
- a driver coupled to the key matrix and operative to decode the non-overlapping signals and generate an event update corresponding to a direction of rotation of the quadrature signal generator,
- wherein a segment output of the driver is coupled to complementary signals of the non-overlapping signals.
A system comprising:
- a quadrature signal generator operative to generate quadrature signals on rotation;
- a quadrature signal decoder operative to convert the quadrature signals into non-overlapping signals;
- a key matrix operative to receive the non-overlapping signals;
- and
- a driver coupled to the key matrix and operative to decode the non-overlapping signals and generate an event update corresponding to a direction of rotation of the quadrature signal generator,
- wherein the key matrix receives each of the non-overlapping signals through a corresponding transistor.
A system comprising:
- a quadrature signal generator operative to generate quadrature signals on rotation;
- a quadrature signal decoder operative to convert the quadrature signals into non-overlapping signals;
- a key matrix operative to receive the non-overlapping signals;
- and
- a driver coupled to the key matrix and operative to decode the non-overlapping signals and generate an event update corresponding to a direction of rotation of the quadrature signal generator,
- wherein the driver comprises a storage element to store the event update.
Dependencies are inferred from the claim text.