Texas Instruments Corporation

Richard Edwin Hubbard

Vijayalakshmi Devarajan

Richard Sterling Broughton

Mark Edward Wentroble

Abhijeeth Aarey Premanath

Roland Sperlich

Lokesh Kumar Gupta

Maxwell G Robertson

Dejan Radic

Sreeraman Anantharaman

Charles Michael Campbell

Wesley Ray

Terry Mayhugh

A circuit (e.g., implemented as part of a controller area network (CAN) bus receiver includes a pre-amplifier stage having first and second outputs. The circuit also includes a comparator having first and second inputs. The first input is coupled to the first output of the pre-amplifier stage, and the second input is coupled to the second output of the pre-amplifier stage. The comparator includes an input differential transistor pair, a second pair of transistors coupled to the input differential transistor pair in a cascode configuration, and a push-pull output stage coupled to the second pair of transistors.

Lower-skew receiver circuit with RF immunity for controller area network (CAN)

An integrated circuit includes an input terminal, an input buffer circuit, an interface voltage control circuit, an output voltage selection circuit, an output driver circuit, and an output terminal. The input buffer circuit is coupled to the input terminal. The interface voltage control circuit is coupled to the input terminal. The output voltage selection circuit is coupled to the interface voltage control circuit. The output driver circuit is coupled to the output voltage selection circuit. The output terminal is coupled to the output driver circuit.

Automatic input/output voltage control

An integrated circuit includes a combined serial data output and interrupt output terminal, a serial communication control circuit; an interrupt generation circuit, and an output circuit. The output circuit includes a serial data input, an interrupt input, and a combined serial data and interrupt output. The serial data input is coupled to a serial data output of the serial communication circuit. The interrupt input is coupled to an interrupt output of the interrupt generation circuit. The combined serial data and interrupt output is coupled to the combined serial data output and interrupt output terminal.

Integrated circuit with combined interrupt and serial data output

A CAN bus transceiver includes CAN bus fault detection circuitry that can provide detailed information to simplify the task of the service technician when there is a CAN bus fault. Voltage and current measurements of the CAN bus are made and from them a fault type is determined. A time-domain reflectometer monitors the CAN bus signals for transmitted and reflected signals and from them a distance to the fault is determined. Either or both values are provided to a service technician to allow error determination and correction.

Control area network (CAN) bus fault detection

Two CAN bus transceivers utilized in a single integrated circuit package with the CAN bus connections between the two transceivers being inverted. Thus, one transceiver is connected to the CAN bus high and low lines while the other transceiver is connected to the CAN bus low and high lines. Both transceivers power up in a standby condition and each transceiver is monitoring for wake up signals on the CAN bus. The transceiver that is correctly connected to the CAN bus detects wake up signals. When the wake up signals are detected at that transceiver, that transceiver is brought to full operating state and the other transceiver is placed in a full standby condition. Additional input resistance is provided with each transceiver to maintain the proper input resistance for the integrated circuit.

Control area network (CAN) transceivers with automatic polarity detection

In a segmented data path, a source is able to 'discover' whether any tunable repeater nodes are present. When one or more tunable repeaters are discovered, the source may adjust its link initialization sequence accordingly to train each 'hop' individually and thereafter individually configure each intermediary repeater.

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Allen, TX, United States of America

Richard Edwin Hubbard