The assignee for this patent, patent number 8619911, is
Reporters obtained the following quote from the background information supplied by the inventors: "Appliances, such as washing machines, audio-video players and set top boxes, include one or more quadrature signal generators on their respective user interfaces. Examples of quadrature signal generators include, but are not limited to, incremental rotary encoders and hall effect sensors.
"In general, the quadrature signal generators track motion and determine an angular position and velocity of a shaft by providing two outputs that are 90.degree. out of phase with each other. In other words, the quadrature signal generators provide quadrature signals in response to movement of the shaft. Such quadrature signals can be decoded either by a microcontroller or by an integrated circuit (IC) dedicated for the purpose.
"Generally, several bytes of memory are consumed by coding instructions, which are written in the microcontroller, to decode the quadrature signals. In addition, extra lines or cables are required to interface the microcontroller with the incremental rotary encoder. The burden becomes even more pronounced in complex applications where the microcontroller has to attend to critical tasks as well. On the other hand, ICs that are used for the purpose of decoding quadrature signals are not just complex to implement, but are also cost ineffective. In addition, the ICs occupy a substantial fraction of the board real estate."
In addition to obtaining background information on this patent, VerticalNews editors also obtained the inventors' summary information for this patent: "This summary is provided to introduce concepts related to decoding of quadrature signals using a driver, which are further described below in the detailed description. This summary is not intended to identify essential features of the claimed subject matter nor is it intended for use in determining or limiting the scope of the claimed subject matter.
"In one embodiment, the system includes a quadrature signal generator, a quadrature signal decoder, a key matrix, and a driver. The quadrature signal generator generates a plurality of quadrature signals on rotation. The quadrature signal decoder is configured to convert the plurality of quadrature signals into non-overlapping signals. The key matrix is configured to receive the non-overlapping signals. Further, the driver scans the key matrix to decode the non-overlapping signals and generate an event update corresponding to a direction of rotation of the quadrature signal generator."
For more information, see this patent: Mallik, Ranajay; Mangal, Munish. Quadrature Signal Decoding Using a Driver. U.S. Patent Number 8619911, filed
Keywords for this news article include: Microcontroller,
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