US 9,099,961 B2 · Output impedance compensation of a pseudo-envelope follower power management system

Abstract

A switch mode power supply converter, a parallel amplifier, and a parallel amplifier output impedance compensation circuit are disclosed. The switch mode power supply converter provides a switching voltage and generates an estimated switching voltage output, which is indicative of the switching voltage. The parallel amplifier generates a power amplifier supply voltage at a power amplifier supply output based on a compensated VRAMP signal. The parallel amplifier output impedance compensation circuit provides the compensated VRAMP signal based on a combination of a VRAMP signal and a high frequency ripple compensation signal. The high frequency ripple compensation signal is based on a difference between the VRAMP signal and the estimated switching voltage output.

Claims24

Dependent claims

Circuitry comprising:

a switch mode power supply converter configured to:
provide a switching voltage;
and
generate an estimated switching voltage output, which is indicative of the switching voltage;
a parallel amplifier configured to generate a power amplifier supply voltage at a power amplifier supply output based on a compensated VRAMP signal;
and
a parallel amplifier output impedance compensation circuit configured to:
provide a high frequency ripple compensation signal based on a difference between a VRAMP signal and the estimated switching voltage output;
and
provide the compensated VRAMP signal based on a combination of the VRAMP signal and the high frequency ripple compensation signal.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/022,858Filed 10 Sep 2013 · continuation in part

Priority

19 Apr 2010

Published

US 2014/0009227 A19 Jan 2014

Granted

4 Aug 2015

Term ends

Not estimatedThe source records don’t support an estimate.

Classification28 codes

H03F 1/02
Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements: modifications of…
H02M 3/07
Using resistors or capacitors, e.g. potential divider: using capacitors charged and discharged alternately by semiconductor devices with control…
H03F 1/0244
With control of the supply voltage or current: stepped control
H03F 1/025
Stepped control: by using a signal derived from the input signal

Family

Application61/325,659Us provisional application · filed 19 Apr 2010

Application61/376,877Us provisional application · filed 25 Aug 2010

Application61/421,348Us provisional application · filed 9 Dec 2010

Application61/421,475Us provisional application · filed 9 Dec 2010

Application61/469,276Us provisional application · filed 30 Mar 2011

Application13/089,917Parent of this continuation-in-part · filed 19 Apr 2011

Application13/218,400Parent of this continuation-in-part · filed 25 Aug 2011

Application13/316,229Parent of this continuation-in-part · filed 9 Dec 2011

US 2014/0009227 A1Pre-grant publication · published 9 Jan 2014

US 8,633,766 B2Parent of this continuation-in-part

US 8,493,141 B2Parent of this continuation-in-part

US 8,519,788 B2Parent of this continuation-in-part

US 2012/0212293 A1Published application

US 2012/0293253 A1Published application

US 2012/0313701 A1Published application

US 9,099,961 B2This patent

From the US filing history. Foreign family members aren’t listed.

Output impedance compensation of a pseudo-envelope follower power management system

Life of this patent

Output impedance compensation of a pseudo-envelope follower power management system

Life of this patent

Abstract

Claims24