Circuit and method of driving analog loads using digital signals
AssigneeOntura Holdings
InventorsMichael BRADLEY, Fred GOLESTANI
Life of this patent
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Abstract
A circuit includes a controller. A driving signal source is coupled to the controller. A first digital output line is coupled between the controller and the analog load. The first digital output line is configured to carry a first digital signal. A second digital output line is coupled between the controller and the driving signal source. The second digital output line is configured to carry a second digital signal. The controller is configured to reproduce a target output signal defined by data from the driving source. The reproduced target output signal is generated by controlling a combination of the first digital signal and the second digital signal, as an output in the analog load.
Claims20
A circuit, comprising:
- a controller;
- a first digital output line coupled between the controller and the analog load, wherein the first digital output line is configured to carry a first digital signal;
- a second digital output line coupled to the controller, wherein the second digital output line is configured to carry a second digital signal, and wherein,
- the controller is configured to reproduce a target output signal defined by data from a driving signal, wherein the reproduced target output signal is generated by controlling a combination of the first digital signal and the second digital signal, as an output in the analog load.
A method of driving a speaker, comprising:
- controlling a voltage level of a first digital signal connected to the speaker between an on state and an off state;
- controlling a voltage level of a second digital signal connected to the speaker between the on state and the off state;
- and
- controlling a duration of the first digital signal in the on state in a reciprocating relationship with a duration of the second digital signal in the on state, wherein frames of the voltage level of the first digital signal and the voltage level of the second digital signal reproduce a driving signal as output from the speaker.
A method of driving an analog load, comprising:
- receiving a driving signal or file;
- generating a first digital signal sent to the analog load;
- generating a second digital signal sent to the analog load;
- establishing a reference voltage level;
- reproducing the driving signal or file as an analog output from the analog load by:
- driving the first digital signal to a voltage state higher than the reference voltage level;
- driving the second digital signal to the voltage state higher than the reference voltage level;
- determining by a controller, a voltage level associated with a section of the driving signal or file;
- and
- pulling either the first digital signal or the second digital signal to the reference voltage state, for a time frame associated with the section of the driving signal or file.
Dependencies are inferred from the claim text.