Reduction of artefacts in multi-channel systems
AssigneeCirrus Logic, Inc.
InventorsRupesh Khare, Mehul Mistry, Gautham Sathyanarayanan
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Abstract
Circuitry for driving first and second loads, the circuitry comprising: a first output signal path for supplying a first driving signal to the first load; a second output signal path for supplying a second driving signal to the second load; sequencer circuitry configured to initiate a first state change in the first output signal path and a second state change in the second output signal path, wherein the sequencer circuitry is configured to control the initiation of the first and second state changes such that the second state change is not synchronised with the first state change.
Claims13
Circuitry for driving first and second loads, the circuitry comprising:
- a first output signal path for supplying a first driving signal to the first load;
- a second output signal path for supplying a second driving signal to the second load;
- a common ground path coupled to the first and second output signal paths, the common ground path including a common resistor, wherein the first output signal path comprises a first feedback path including the common resistor and the second output signal path comprises a second feedback path including the common resistor;
- and
- sequencer circuitry configured to:
- disable an active zero-crossing detection function of the circuitry;
- and
- initiate a first state change in the first output signal path and a second state change in the second output signal path, wherein the sequencer circuitry is configured to control the initiation of the first and second state changes such that the second state change is not synchronised with the first state change.
A method for reducing artefacts in a multi-channel system during a state change, the method comprising:
- disabling an active zero-crossing detection function of the multi-channel system;
- and
- controlling initiation of the state change in each channel such that the state change in one channel is not synchronised with the state change in another channel, wherein the multi-channel system comprises a common ground path for at least the one channel and the another channel, the common ground path comprising a common resistor that is common to feedback paths of the one channel and the another channel.
Dependencies are inferred from the claim text.