Time alignment for an amplification stage
AssigneeNujira Limited
InventorNicholas Shute
Life of this patent
Estimating the term…
Abstract
A method of calibrating a polar amplification stage including a main signal path and a magnitude signal path, the method comprising: generating signals (108, 142) for the main signal path and the magnitude signal path for operating an amplifier (102) between a linear mode of operation and a saturated mode of operation; detecting (114) first and second peaks in a signal at the output of the amplifier (102) representing transitions between the linear and saturated modes of operation; and adjusting (124) the timing in one of the main signal path and the amplitude signal path in dependence on a relative difference between the size of the detected first and second peaks.
Claims20
A method of calibrating a polar amplification stage including a main signal path and a magnitude signal path, the method comprising:
- generating signals for the main signal path and the magnitude signal path for operating the amplifier between a linear mode of operation and a saturated mode of operation;
- detecting first and second peaks in a signal at the output of the amplifier representing transitions between the linear and saturated modes of operation;
- and adjusting the timing in one of the main signal path and the amplitude signal path in dependence on a relative difference between the size of the detected first and second peaks.
A polar amplification stage including a main signal path to an amplifier input and a magnitude signal path to the amplifier supply, the apparatus further comprising:
- a signal generator for generating signals for the main signal path and the magnitude signal path arranged to operate the amplifier between a linear mode of operation and a saturated mode of operation;
- a detector for detecting first and second peaks in a signal at the output of the amplifier representing transitions between the linear and saturated modes of operation;
- and a delay adjustment block for adjusting the timing in one of the main signal path and the amplitude signal path in dependence on a relative difference between the size of the detected first and second peaks.
Dependencies are inferred from the claim text.