Integrator for class D audio amplifier
First Claim
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1. An apparatus comprising:
- voltage-to-current conversion circuitry comprising a first voltage-to-current converter having a differential output and a second voltage-to-current converter, the first voltage-to-current converter comprising an input voltage-to-current converter, the second voltage-to-current converter comprising a first feedback voltage-to-current converter and a second feedback voltage-to-current converter; and
a capacitor coupled to the first voltage-to-current converter and to the second voltage-to-current converter, wherein the first voltage-to-current converter and the second voltage-to-current converter are configured to selectively charge and discharge the capacitor.
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Abstract
An apparatus includes voltage-to-current conversion circuitry comprising a first voltage-to-current converter and a second voltage-to-current converter. The apparatus also includes a capacitor coupled to the first voltage-to-current converter and to the second voltage-to-current converter.
15 Citations
20 Claims
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1. An apparatus comprising:
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voltage-to-current conversion circuitry comprising a first voltage-to-current converter having a differential output and a second voltage-to-current converter, the first voltage-to-current converter comprising an input voltage-to-current converter, the second voltage-to-current converter comprising a first feedback voltage-to-current converter and a second feedback voltage-to-current converter; and a capacitor coupled to the first voltage-to-current converter and to the second voltage-to-current converter, wherein the first voltage-to-current converter and the second voltage-to-current converter are configured to selectively charge and discharge the capacitor. - View Dependent Claims (6, 7, 8, 17, 19, 20)
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2. An apparatus comprising:
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voltage-to-current conversion circuitry comprising a first voltage-to-current converter having a differential output and a second voltage-to-current converter, the first voltage-to-current converter comprising an input voltage-to-current converter, the second voltage-to-current converter comprising a first feedback voltage-to-current converter and a second feedback voltage-to-current converter; and a capacitor coupled to the first voltage-to-current converter and to the second voltage-to-current converter, wherein the first voltage-to-current converter is configured to output a first output current to a first terminal of the capacitor and to output a second output current to a second terminal of the capacitor.
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3. An apparatus comprising:
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voltage-to-current conversion circuitry comprising a first voltage-to-current converter having a differential output and a second voltage-to-current converter, the first voltage-to-current converter comprising an input voltage-to-current converter, the second voltage-to-current converter comprising a first feedback voltage-to-current converter and a second feedback voltage-to-current converter; a capacitor coupled to the first voltage-to-current converter and to the second voltage-to-current converter; a first comparator configured to compare a voltage level at a positive terminal of the capacitor to a voltage level of a signal; and a second comparator configured to compare a voltage level at a negative terminal of the capacitor to the voltage level of the signal. - View Dependent Claims (4, 5)
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9. A method comprising:
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converting differential input voltage signals into differential input current signals; converting voltage signals from comparators into feedback current signals, the converting voltage signals comprising converting a first voltage signal from a first comparator into a first feedback current signal and converting a second voltage signal from a second comparator into a second feedback current signal; and selectively charging and discharging a capacitor based on the differential input current signals and the feedback current signals. - View Dependent Claims (10, 11)
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12. An apparatus comprising:
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means for converting input voltage signals into first current signals, the means for converting input voltage signals into first current signals having a differential output; means for converting voltage signals into second current signals, the means for converting voltage signals into second current signals comprising means for converting a first feedback voltage into one current signal and means for converting a second feedback voltage into another current signal; and means for storing energy coupled to the means for converting input voltage signals into first current signals and coupled to the means for converting voltage signals into second current signals, wherein the means for converting input voltage signals into first current signals and the means for converting voltage signals into second current signals are configured to selectively charge and discharge the means for storing energy. - View Dependent Claims (13, 14, 15, 16, 18)
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Specification