Soft handover in a coupled dual-oscillator system
AssigneeTexas Instruments Incorporated
InventorsShanmuganand CHELLAMUTHU, Qunying LI, Vikram Joseph MANI
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Abstract
A system includes a sensor integrated circuit (IC), including a driver adapted to be coupled to an oscillator, the driver including first and second transistors. The sensor IC includes an amplitude control amplifier coupled to the first transistor. The sensor IC also includes a common mode control amplifier coupled to the second transistor. The sensor IC includes a handover control circuit coupled to the amplitude control amplifier and configured to hand off an operation from the sensor IC to a different sensor IC, the handover control circuit including a resistor network coupled to a switch network.
Claims20
A system, comprising:
- a sensor integrated circuit (IC), including:
- a driver adapted to be coupled to an oscillator, the driver including first and second transistors;
- an amplitude control amplifier coupled to the first transistor;
- a common mode control amplifier coupled to the second transistor;
- and
- a handover control circuit coupled to the amplitude control amplifier and configured to hand off an operation from the sensor IC to a different sensor IC, the handover control circuit including a resistor network coupled to a switch network.
A system, comprising:
- a sensor integrated circuit (IC), including:
- a driver configured to produce an oscillating waveform, the driver including a first transistor and a second transistor;
- an amplitude control amplifier coupled to the first transistor and configured to adjust a differential output voltage value of the oscillating waveform;
- a common mode control amplifier coupled to the second transistor and configured to adjust an average voltage value of the oscillating waveform;
- and
- a handover control circuit coupled to the amplitude control amplifier, wherein the handover control circuit includes a resistor network coupled to a switch network, and wherein the handover control circuit is configured to repeatedly step down a preset reference voltage provided to the amplitude control amplifier.
A method, comprising:
- providing a preset reference voltage to an amplitude control amplifier in a sensor integrated circuit (IC);
- providing an output of the amplitude control amplifier to a driver of an oscillator to adjust an amplitude of the oscillator;
- reducing the preset reference voltage provided to the amplitude control amplifier in a series of steps;
- and
- responsive to completing the series of steps, turning off the driver.
Dependencies are inferred from the claim text.