US 2014/0111276 A1 · BOOST CONVERTER CONTROL FOR ENVELOPE TRACKING

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.

Claims20

Dependent claims

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.

1 more element

Dependencies are inferred from the claim text.

Boost converter control for envelope tracking

Life of this patent

Boost converter control for envelope tracking

Life of this patent

Abstract

Claims20