Back to results
US 10,992,308 B1Granted
In-situ measurement of the delay between the envelope and the RF signal in envelope-tracking systems
AssigneeQUALCOMM Incorporated
InventorsChirag Sthalekar, Leon Metreaud, Hakan Inanoglu, Xiangdong Zhang
Life of this patent
Estimating the term…
Abstract
An in-situ delay measurement is performed for an envelope-tracking power amplifier of an RF input signal. Because the delay measurement is in-situ, the delay measurement avoids the necessity to down convert and digitize a version of an RF output signal from the envelope-tracking power amplifier.
Claims26
A transmitter, comprising:
- a power amplifier configured to amplify an RF input signal to form an RF output signal;
- an envelope-tracking power supply configured to provide an envelope-tracking power supply voltage for the power amplifier;
- and
- a delay measurement circuit configured to measure a delay between an input envelope of the RF input signal and an output envelope of the RF output signal to provide a measured delay.
1 more element
A transmitter, comprising:
- a power amplifier configured to amplify an RF input signal to form an RF output signal;
- an envelope-tracking power supply configured to provide an envelope-tracking power supply voltage for the power amplifier;
- and
- a delay measurement circuit configured to measure a delay between an input envelope of the RF input signal and the envelope-tracking power supply voltage to provide a measured delay.
1 more element
A method, comprising:
- converting a digital baseband signal into an RF input signal;
- amplifying the RF input signal through an envelope-tracking power amplifier to produce an RF output signal;
- detecting a peak in an input envelope of the RF input signal and a peak in an output envelope of the RF output signal;
- measuring a delay between the peak in the input envelope and the peak in the output envelope;
- and
- delaying the digital baseband signal responsive to the delay measurement.
3 more elements
A method, comprising:
- converting a digital baseband signal into an RF input signal;
- generating an envelope-tracking power supply voltage responsive to a magnitude of the digital baseband signal;
- amplifying the RF input signal through an envelope-tracking power amplifier to produce an RF output signal while the envelope-tracking power amplifier is powered by the envelope-tracking power supply voltage;
- detecting a peak in an input envelope of the RF input signal and a peak in the envelope-tracking power supply voltage;
- measuring a delay between the peak in the input envelope and the peak in the envelope-tracking power supply voltage;
- and
- delaying the digital baseband signal responsive to the delay measurement.
4 more elements
Dependencies are inferred from the claim text.