BOOST CONVERTER CONTROL FOR ENVELOPE TRACKING
First Claim
1. An apparatus comprising:
- an enable generation block configured to turn on an enable signal in response to detecting that a sum of a first headroom voltage and an enable peak of a tracking supply voltage is greater than an amplifier supply voltage; and
a target generation block configured to generate a target voltage comprising the sum of a second headroom voltage and a target peak of the tracking supply voltage;
wherein a boost converter is configurable to generate the amplifier supply voltage higher than a boost supply voltage coupled to the boost converter, and wherein the boost converter is configured to be enabled in response to the enable signal being turned on and, when enabled, to drive the amplifier supply voltage to the target voltage.
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Accused Products
Abstract
Techniques for controlling boost converter operation in an envelope tracking (ET) system. In an aspect, an enable generation block is provided to generate an enable signal for a boost converter, wherein the enable signal is turned on in response to detecting that a sum of a first headroom voltage and an enable peak of a tracking supply voltage is greater than an amplifier supply voltage of the ET system. The enable signal may be turned on for a predetermined enable on duration. In another aspect, a target generation block is provided to generate a target voltage for the boost converter, wherein the target voltage comprises the sum of a second headroom voltage and a target peak of the tracking supply voltage.
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Citations
20 Claims
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1. An apparatus comprising:
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an enable generation block configured to turn on an enable signal in response to detecting that a sum of a first headroom voltage and an enable peak of a tracking supply voltage is greater than an amplifier supply voltage; and a target generation block configured to generate a target voltage comprising the sum of a second headroom voltage and a target peak of the tracking supply voltage; wherein a boost converter is configurable to generate the amplifier supply voltage higher than a boost supply voltage coupled to the boost converter, and wherein the boost converter is configured to be enabled in response to the enable signal being turned on and, when enabled, to drive the amplifier supply voltage to the target voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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generating an amplifier supply voltage configurable to be higher than a boost supply voltage; turning on an enable signal in response to detecting that a sum of a first headroom voltage and an enable peak of a tracking supply voltage is greater than the amplifier supply voltage; generating a target voltage comprising the sum of a second headroom voltage and a target peak of the tracking supply voltage; driving the amplifier supply voltage to the target voltage in response to the enable signal being turned on. - View Dependent Claims (12, 13, 14, 15)
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16. An apparatus comprising:
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means for generating an amplifier supply voltage configurable to be higher than a boost supply voltage; means for turning on an enable signal in response to detecting that a sum of a first headroom voltage and an enable peak of a tracking supply voltage is greater than the amplifier supply voltage; means for generating a target voltage comprising the sum of a second headroom voltage and a target peak of the tracking supply voltage; means for driving the amplifier supply voltage to the target voltage in response to the enable signal being turned on - View Dependent Claims (17, 18, 19, 20)
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Specification